Environmental Science › Pollution

Heavy metals in environment

Works Count: 91698

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Description

This cluster of papers focuses on the environmental impact of heavy metal contamination, covering topics such as soil and sediment pollution, health risks associated with heavy metal exposure, remediation strategies, bioavailability of heavy metals, and the effects of urbanization on heavy metal distribution.

Keywords

Heavy Metals; Contamination; Soil; Health Risk; Remediation; Bioavailability; Sediment; Pollution; Toxicity; Urban

Trace elements in soils and plants

1985-05-01

L. L. Chyi

Improvement of the BCR three step sequential extraction procedure prior to the certification of new sediment and soil reference materials

1999-01-01

G. Rauret , José Fermı́n López-Sánchez , A. Sahuquillo +4 more

The Standards, Measurements and Testing Programme (formerly BCR) of the European Commission proposed a three-step sequential extraction procedure for sediment analysis, following extensive expert consultations and two interlaboratory studies. This … The Standards, Measurements and Testing Programme (formerly BCR) of the European Commission proposed a three-step sequential extraction procedure for sediment analysis, following extensive expert consultations and two interlaboratory studies. This scheme was recently used to certify the extractable trace element contents of a sediment reference material (CRM 601). Although this procedure offers a means to ensure the comparability of data in this field, some difficulties concerning the interlaboratory reproducibility still remain, and a new project is currently being conducted to determine the causes of poor reproducibility in the extraction scheme. The final objective of the project is the certification of new sediment and soil reference materials for their extractable contents of Cd, Cr, Cu, Ni, Pb and Zn. This paper presents the results of a small-scale interlaboratory study, which aimed to test a revised version of the extraction schemes by comparing the original and the modified protocols using the CRM 601 sample. This work offers an improvement to the BCR sequential extraction procedure through intercomparison exercises. This improved procedure will allow the obtaining of CRMs to validate analytical data in the analysis of soils and sediments, and it will also facilitate comparability of data in the European Union.

Ecological risk assessment of heavy metals in sediment and human health risk assessment of heavy metals in fishes in the middle and lower reaches of the Yangtze River basin

2011-07-29

Yujun Yi , Zhifeng Yang , Shanghong Zhang

Manual for the geochemical analyses of marine sediments and suspended particulate matter

1992-07-01

D. H. Loring , R.T.T. Rantala

A review of soil heavy metal pollution from mines in China: Pollution and health risk assessment

2013-09-25

Zhiyuan Li , Zongwei Ma , Tsering Jan van der Kuijp +2 more

Environmental Chemistry of Soils

1995-01-01

William R. Roy

Health risks of heavy metals in contaminated soils and food crops irrigated with wastewater in Beijing, China

2007-08-28

Shakeel A. Khan , Qing Cao , Yi Zheng +2 more

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Toxicity of heavy metals to microorganisms and microbial processes in agricultural soils: a review

1998-09-01

K.E. Giller , Ernst Witter , S. P. McGrath

Elemental mass-balance of material carried by major world rivers

1979-03-01

Jean‐Marie Martin , Michel Meybeck

Remediation of heavy metal(loid)s contaminated soils – To mobilize or to immobilize?

2013-12-21

Nanthi Bolan , Anitha Kunhikrishnan , Ramya Thangarajan +5 more

A review of biochars’ potential role in the remediation, revegetation and restoration of contaminated soils

2011-08-21

Luke Beesley , Eduardo Moreno‐Jiménez , Jose L. Gomez‐Eyles +3 more

Microbial heavy-metal resistance

1999-06-22

Dietrich H. Nies

Adsorption of heavy metal ions on soils and soils constituents

2004-04-26

H. Bradl

Microbial Resistance to Metals in the Environment

2000-03-01

Mark R. Bruins , Sanjay Kapil , Frederick W. Oehme

Phytoremediation of heavy metals—Concepts and applications

2013-03-07

Hazrat Ali , Ezzat Khan , Muhammad Sajad

Stabilization of As, Cr, Cu, Pb and Zn in soil using amendments – A review

2007-02-23

Jūratė Kumpienė , Anders Lagerkvist , Christian Maurice

Differenzierung der Eisenoxide des Bodens durch Extraktion mit Ammoniumoxalat-Lösung

1964-01-01

U. Schwertmann

Multivariate analysis of heavy metal contamination in urban dusts of Xi'an, Central China

2005-05-11

H YONGMING , DU Pei-xuan , Cao Junji +1 more

Toxic metal accumulation, responses to exposure and mechanisms of tolerance in plants

2006-07-27

Stephan Clemens

A global assessment of natural sources of atmospheric trace metals

1989-03-01

Jerome O. Nriagu

Heavy metal pollution in surface water and sediment: A preliminary assessment of an urban river in a developing country

2014-09-07

Md. Saiful Islam , Md. Kawser Ahmed , Mohammad Raknuzzaman +2 more

Heavy metals, occurrence and toxicity for plants: a review

2010-07-27

P. C. Nagajyoti , K. D. Lee , T.V.M. Sreekanth

Quantitative assessment of worldwide contamination of air, water and soils by trace metals

1988-05-01

Jerome O. Nriagu , Józef M. Pacyna

Contamination features and health risk of soil heavy metals in China

2015-01-23

Haiyang Chen , Yanguo Teng , Sijin Lu +2 more

Problems in the assessment of heavy-metal levels in estuaries and the formation of a pollution index

1980-03-01

D. L. Tomlinson , James G. Wilson , C. R. Harris +1 more

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Bed sediment-associated trace metals in an urban stream, Oahu, Hawaii

2000-04-18

Ross A. Sutherland

Accumulation of Pb, Cu, and Zn in native plants growing on a contaminated Florida site

2006-04-05

Joonki Yoon , Xinde Cao , Qixing Zhou +1 more

A review of heavy metal contaminations in urban soils, urban road dusts and agricultural soils from China

2009-10-05

Binggan Wei , Linsheng Yang

Heavy Metals in Contaminated Soils: A Review of Sources, Chemistry, Risks and Best Available Strategies for Remediation

2011-10-24

R. A. Wuana , F. E. Okieimen

Scattered literature is harnessed to critically review the possible sources, chemistry, potential biohazards and best available remedial strategies for a number of heavy metals (lead, chromium, arsenic, zinc, cadmium, copper, … Scattered literature is harnessed to critically review the possible sources, chemistry, potential biohazards and best available remedial strategies for a number of heavy metals (lead, chromium, arsenic, zinc, cadmium, copper, mercury and nickel) commonly found in contaminated soils. The principles, advantages and disadvantages of immobilization, soil washing and phytoremediation techniques which are frequently listed among the best demonstrated available technologies for cleaning up heavy metal contaminated sites are presented. Remediation of heavy metal contaminated soils is necessary to reduce the associated risks, make the land resource available for agricultural production, enhance food security and scale down land tenure problems arising from changes in the land use pattern.

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Speciation of Heavy Metals in Soils and Sediments. An Account of the Improvement and Harmonization of Extraction Techniques Undertaken Under the Auspices of the BCR of the Commission of the European Communities

1993-06-01

A.M. Ure , Ph. Quevauviller , H. Muntau +1 more

Abstract An account is presented of a series of investigations and collaborative studies, initiated by BCR, on current methods of metal speciation by extraction of soils and sediments with chemical … Abstract An account is presented of a series of investigations and collaborative studies, initiated by BCR, on current methods of metal speciation by extraction of soils and sediments with chemical reagents. It was established by extensive consultation with European experts that the diverse procedures used could be harmonized into agreed methods. These methods, including both single extractant and sequential extraction procedures were subjected to collaborative, interlaboratory trials and the results, presented briefly here, showed that it was both possible and desirable that reference soils and sediments, characterised by certified values for extractable contents, be prepared. As a consequence of these studies two soils have been prepared and will shortly be the subject of interlaboratory analysis with a view to certification of their EDTA and acetic acid extractable contents of some heavy metals. Following this workshop a feasibility study of the agreed sequential extraction procedure will, it is believed, shortly lead to certification of sediments for contents extractable by a defined sequential extraction procedure.

Assessment of heavy metal enrichment factors and the degree of contamination in marine sediments from Tamaki Estuary, Auckland, New Zealand

2007-03-16

Ghada M. S. Abrahim , R. J. Parker

Metals, minerals and microbes: geomicrobiology and bioremediation

2009-12-18

Geoffrey Michael Gadd

Microbes play key geoactive roles in the biosphere, particularly in the areas of element biotransformations and biogeochemical cycling, metal and mineral transformations, decomposition, bioweathering, and soil and sediment formation. All … Microbes play key geoactive roles in the biosphere, particularly in the areas of element biotransformations and biogeochemical cycling, metal and mineral transformations, decomposition, bioweathering, and soil and sediment formation. All kinds of microbes, including prokaryotes and eukaryotes and their symbiotic associations with each other and 'higher organisms', can contribute actively to geological phenomena, and central to many such geomicrobial processes are transformations of metals and minerals. Microbes have a variety of properties that can effect changes in metal speciation, toxicity and mobility, as well as mineral formation or mineral dissolution or deterioration. Such mechanisms are important components of natural biogeochemical cycles for metals as well as associated elements in biomass, soil, rocks and minerals, e.g. sulfur and phosphorus, and metalloids, actinides and metal radionuclides. Apart from being important in natural biosphere processes, metal and mineral transformations can have beneficial or detrimental consequences in a human context. Bioremediation is the application of biological systems to the clean-up of organic and inorganic pollution, with bacteria and fungi being the most important organisms for reclamation, immobilization or detoxification of metallic and radionuclide pollutants. Some biominerals or metallic elements deposited by microbes have catalytic and other properties in nanoparticle, crystalline or colloidal forms, and these are relevant to the development of novel biomaterials for technological and antimicrobial purposes. On the negative side, metal and mineral transformations by microbes may result in spoilage and destruction of natural and synthetic materials, rock and mineral-based building materials (e.g. concrete), acid mine drainage and associated metal pollution, biocorrosion of metals, alloys and related substances, and adverse effects on radionuclide speciation, mobility and containment, all with immense social and economic consequences. The ubiquity and importance of microbes in biosphere processes make geomicrobiology one of the most important concepts within microbiology, and one requiring an interdisciplinary approach to define environmental and applied significance and underpin exploitation in biotechnology.

Accumulators and excluders ‐strategies in the response of plants to heavy metals

1981-01-01

Alan J. M. Baker

Abstract Plants colonizing metalliferous soils have evolved physiological mechanisms which enable them to tolerate metal toxicity. These mechanisms do not generally suppress metal uptake but result in internal detoxification. Two … Abstract Plants colonizing metalliferous soils have evolved physiological mechanisms which enable them to tolerate metal toxicity. These mechanisms do not generally suppress metal uptake but result in internal detoxification. Two basic strategies of plant response are suggested, accumulators and excluders. In the former, metals can be concentrated in plant parts from low or high background levels. By contrast, differential uptake and transport between root and shoot in excluders, lead to more or less constant low shoot levels over a wide range of external concentration. 'Indicators' are seen as a further mode of response where proportional relationships exist between metal levels in the soil, uptake and accumulation in plant parts. The physiological properties of accumulator and excluder species are considered in relation to metal tolerance mechanisms.

Development of a DTPA Soil Test for Zinc, Iron, Manganese, and Copper

1978-05-01

W. L. Lindsay , W. A. Norvell

Abstract A DTPA soil test was developed to identify near‐neutral and calcareous soils with insufficient available Zn, Fe, Mn, or Cu for maximum yields of crops. The extractant consists of … Abstract A DTPA soil test was developed to identify near‐neutral and calcareous soils with insufficient available Zn, Fe, Mn, or Cu for maximum yields of crops. The extractant consists of 0.005 M DTPA (diethylenetriaminepentaacetic acid), 0.1 M triethanolamine, and 0.01 M CaCl 2 , with a pH of 7.3. The soil test consists of shaking 10 g of air‐dry soil with 20 ml of extractant for 2 hours. The leachate is filtered, and Zn, Fe, Mn, and Cu are measured in the filtrate by atomic absorption spectrophotometry. The soil test successfully separated 77 Colorado soils on the basis of crop response to Zn, Fe, and Mn fertilizers. Critical nutrient levels must be determined separately for each crop using standardized procedures for soil preparation, grinding, and extraction. The critical levels for corn using the procedures reported herein were: 0.8 ppm for Zn, 4.5 ppm for Fe, and tentatively 1.0 ppm for Mn, and 0.2 ppm for Cu. Development of the soil test was based, in part, on theoretical considerations. The extractant is buffered at pH 7.30 and contains CaCl 2 so that equilibrium with CaCO 3 is established at a CO 2 level about 10 times that of the atmosphere. Thus, the extractant precludes dissolution of CaCO 3 and the release of occluded nutrients which are normally not available to plants. DTPA was selected as the chelating agent because it can effectively extract all four micronutrient metals. Factors such as pH, concentration of chelating agent, time of shaking, and temperature of extraction affect the amount of micronutrients extracted and were adjusted for maximum overall effectiveness.

Heavy metal hyperaccumulating plants: How and why do they do it? And what makes them so interesting?

2010-09-16

Nicoletta Rascio , F. Navari‐Izzo

Trace Elements from Soil to Human

2007-01-01

Alina Kabata‐Pendias , Arun B. Mukherjee

Heavy metals in agricultural soils of the European Union with implications for food safety

2016-02-03

Gergely Tóth , Tamás Hermann , M.R. Da Silva +1 more

Soil plays a central role in food safety as it determines the possible composition of food and feed at the root of the food chain. However, the quality of soil … Soil plays a central role in food safety as it determines the possible composition of food and feed at the root of the food chain. However, the quality of soil resources as defined by their potential impact on human health by propagation of harmful elements through the food chain has been poorly studied in Europe due to the lack of data of adequate detail and reliability. The European Union's first harmonized topsoil sampling and coherent analytical procedure produced trace element measurements from approximately 22,000 locations. This unique collection of information enables a reliable overview of the concentration of heavy metals, also referred to as metal(loid)s including As, Cd, Cr, Cu, Hg, Pb, Zn, Sb. Co, and Ni. In this article we propose that in some cases (e.g. Hg and Cd) the high concentrations of soil heavy metal attributed to human activity can be detected at a regional level. While the immense majority of European agricultural land can be considered adequately safe for food production, an estimated 6.24% or 137,000 km 2 needs local assessment and eventual remediation action. • The concentration of heavy metals including As, Cd, Cr, Cu, Hg, Pb, Zn, Sb, Co and Ni in soil of the EU was assessed. • An estimated 6.24% or 137,000 km 2 agricultural land needs local assessment and eventual remediation action. • A need for a comprehensive monitoring of HM in soil in the European Union is proposed. • Establishment of harmonized screening values for soil contamination in the EU is suggested.

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Soil Contamination in China: Current Status and Mitigation Strategies

2014-12-16

Fang‐Jie Zhao , Yibing Ma , Yong‐Guan Zhu +2 more

China faces great challenges in protecting its soil from contamination caused by rapid industrialization and urbanization over the last three decades. Recent nationwide surveys show that 16% of the soil … China faces great challenges in protecting its soil from contamination caused by rapid industrialization and urbanization over the last three decades. Recent nationwide surveys show that 16% of the soil samples, 19% for the agricultural soils, are contaminated based on China’s soil environmental quality limits, mainly with heavy metals and metalloids. Comparisons with other regions of the world show that the current status of soil contamination, based on the total contaminant concentrations, is not worse in China. However, the concentrations of some heavy metals in Chinese soils appear to be increasing at much greater rates. Exceedance of the contaminant limits in food crops is widespread in some areas, especially southern China, due to elevated inputs of contaminants, acidic nature of the soil and crop species or cultivars prone to heavy metal accumulation. Minimizing the transfer of contaminants from soil to the food chain is a top priority. A number of options are proposed, including identification of the sources of contaminants to agricultural systems, minimization of contaminant inputs, reduction of heavy metal phytoavailability in soil with liming or other immobilizing materials, selection and breeding of low accumulating crop cultivars, adoption of appropriate water and fertilizer management, bioremediation, and change of land use to grow nonfood crops. Implementation of these strategies requires not only technological advances, but also social-economic evaluation and effective enforcement of environmental protection law.

A review of soil heavy metal pollution from industrial and agricultural regions in China: Pollution and risk assessment

2018-06-14

Qianqi Yang , Zhiyuan Li , Xiaoqiong Lu +3 more

Heavy metals in food crops: Health risks, fate, mechanisms, and management

2019-02-10

Prabhat Kumar , Sang Soo Lee , Ming Zhang +2 more

Food security is a high-priority issue for sustainable global development both quantitatively and qualitatively. In recent decades, adverse effects of unexpected contaminants on crop quality have threatened both food security … Food security is a high-priority issue for sustainable global development both quantitatively and qualitatively. In recent decades, adverse effects of unexpected contaminants on crop quality have threatened both food security and human health. Heavy metals and metalloids (e.g., Hg, As, Pb, Cd, and Cr) can disturb human metabolomics, contributing to morbidity and even mortality. Therefore, this review focuses on and describes heavy metal contamination in soil–food crop subsystems with respect to human health risks. It also explores the possible geographical pathways of heavy metals in such subsystems. In-depth discussion is further offered on physiological/molecular translocation mechanisms involved in the uptake of metallic contaminants inside food crops. Finally, management strategies are proposed to regain sustainability in soil–food subsystems.

Environmental Chemistry and Ecotoxicology of Hazardous Heavy Metals: Environmental Persistence, Toxicity, and Bioaccumulation

2019-03-05

Hazrat Ali , Ezzat Khan , Ikram Ilahi

Heavy metals are well-known environmental pollutants due to their toxicity, persistence in the environment, and bioaccumulative nature. Their natural sources include weathering of metal-bearing rocks and volcanic eruptions, while anthropogenic … Heavy metals are well-known environmental pollutants due to their toxicity, persistence in the environment, and bioaccumulative nature. Their natural sources include weathering of metal-bearing rocks and volcanic eruptions, while anthropogenic sources include mining and various industrial and agricultural activities. Mining and industrial processing for extraction of mineral resources and their subsequent applications for industrial, agricultural, and economic development has led to an increase in the mobilization of these elements in the environment and disturbance of their biogeochemical cycles. Contamination of aquatic and terrestrial ecosystems with toxic heavy metals is an environmental problem of public health concern. Being persistent pollutants, heavy metals accumulate in the environment and consequently contaminate the food chains. Accumulation of potentially toxic heavy metals in biota causes a potential health threat to their consumers including humans. This article comprehensively reviews the different aspects of heavy metals as hazardous materials with special focus on their environmental persistence, toxicity for living organisms, and bioaccumulative potential. The bioaccumulation of these elements and its implications for human health are discussed with a special coverage on fish, rice, and tobacco. The article will serve as a valuable educational resource for both undergraduate and graduate students and for researchers in environmental sciences. Environmentally relevant most hazardous heavy metals and metalloids include Cr, Ni, Cu, Zn, Cd, Pb, Hg, and As. The trophic transfer of these elements in aquatic and terrestrial food chains/webs has important implications for wildlife and human health. It is very important to assess and monitor the concentrations of potentially toxic heavy metals and metalloids in different environmental segments and in the resident biota. A comprehensive study of the environmental chemistry and ecotoxicology of hazardous heavy metals and metalloids shows that steps should be taken to minimize the impact of these elements on human health and the environment.

Phytoremediation: A Promising Approach for Revegetation of Heavy Metal-Polluted Land

2020-04-30

An Yan , Yamin Wang , Swee Ngin Tan +3 more

Heavy metal accumulation in soil has been rapidly increased due to various natural processes and anthropogenic (industrial) activities. As heavy metals are non-biodegradable, they persist in the environment, have potential … Heavy metal accumulation in soil has been rapidly increased due to various natural processes and anthropogenic (industrial) activities. As heavy metals are non-biodegradable, they persist in the environment, have potential to enter the food chain through crop plants and eventually may accumulate in human body through biomagnification. Due to their toxic nature, heavy metal contamination has posed a serious threat to human health and the ecosystem. Therefore, remediation of land contamination is of paramount importance. Phytoremediation is an eco-friendly approach that could be a successful mitigation measure to revegetate heavy metal-polluted soil in a cost effective way. To improve the efficiency of phytoremediation, a better understanding of the mechanisms underlying heavy metal accumulation and tolerance in plant is indispensable. In this review, we describe the mechanisms of how heavy metals are taken up, translocated and detoxified in plants. We focus on the strategies applied to improve the efficiency of phytostabilization and phytoextraction, including the application of genetic engineering, microbe-assisted and chelate-assisted approaches.

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Heavy metal pollution in the environment and their toxicological effects on humans

2020-09-01

Jessica Briffa , Emmanuel Sinagra , Renald Blundell

Environmental pollution of heavy metals is increasingly becoming a problem and has become of great concern due to the adverse effects it is causing around the world. These inorganic pollutants … Environmental pollution of heavy metals is increasingly becoming a problem and has become of great concern due to the adverse effects it is causing around the world. These inorganic pollutants are being discarded in our waters, soils and into the atmosphere due to the rapidly growing agriculture and metal industries, improper waste disposal, fertilizers and pesticides. This review shows how pollutants enter the environment together with their fate. Some metals affect biological functions and growth, while other metals accumulate in one or more different organs causing many serious diseases such as cancer. The pharmacokinetics and toxicological processes in humans for each metal is described. In summary, the review shows the physiological and biochemical effects of each heavy metal bioaccumulation in humans and the level of gravity and disquieting factor of the disease.

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Heavy Metals and Pesticides Toxicity in Agricultural Soil and Plants: Ecological Risks and Human Health Implications

2021-02-25

Ahmed Alengebawy , Sara Taha Abdelkhalek , Sundas Rana Qureshi +1 more

Environmental problems have always received immense attention from scientists. Toxicants pollution is a critical environmental concern that has posed serious threats to human health and agricultural production. Heavy metals and … Environmental problems have always received immense attention from scientists. Toxicants pollution is a critical environmental concern that has posed serious threats to human health and agricultural production. Heavy metals and pesticides are top of the list of environmental toxicants endangering nature. This review focuses on the toxic effect of heavy metals (cadmium (Cd), lead (Pb), copper (Cu), and zinc (Zn)) and pesticides (insecticides, herbicides, and fungicides) adversely influencing the agricultural ecosystem (plant and soil) and human health. Furthermore, heavy metals accumulation and pesticide residues in soils and plants have been discussed in detail. In addition, the characteristics of contaminated soil and plant physiological parameters have been reviewed. Moreover, human diseases caused by exposure to heavy metals and pesticides were also reported. The bioaccumulation, mechanism of action, and transmission pathways of both heavy metals and pesticides are emphasized. In addition, the bioavailability in soil and plant uptake of these contaminants has also been considered. Meanwhile, the synergistic and antagonistic interactions between heavy metals and pesticides and their combined toxic effects have been discussed. Previous relevant studies are included to cover all aspects of this review. The information in this review provides deep insights into the understanding of environmental toxicants and their hazardous effects.

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PHYTOREMEDIATION

2005-01-11

Elizabeth A. H. Pilon‐Smits

Phytoremediation, the use of plants and their associated microbes for environmental cleanup, has gained acceptance in the past 10 years as a cost-effective, noninvasive alternative or complementary technology for engineering-based … Phytoremediation, the use of plants and their associated microbes for environmental cleanup, has gained acceptance in the past 10 years as a cost-effective, noninvasive alternative or complementary technology for engineering-based remediation methods. Plants can be used for pollutant stabilization, extraction, degradation, or volatilization. These different phytoremediation technologies are reviewed here, including their applicability for various organic and inorganic pollutants, and most suitable plant species. To further enhance the efficiency of phytoremediation, there is a need for better knowledge of the processes that affect pollutant availability, rhizosphere processes, pollutant uptake, translocation, chelation, degradation, and volatilization. For each of these processes I review what is known so far for inorganic and organic pollutants, the remaining gaps in our knowledge, and the practical implications for designing phytoremediation strategies. Transgenic approaches to enhance these processes are also reviewed and discussed.

Phytoremediation of Contaminated Soil and Water

1999-09-24

Norman Terry , Gary S. Bañuelos

Field Demonstrations of Phytoremediation of Lead Contaminated Soils Phytoremediation by Constructed Wetlands Factors Influencing Field Phytoremediations of Selenium-Laden Soils Phytoremediation of Selenium-Polluted Soils and Waters by Phytovolitization Metal Hyperaccumulator Plants: … Field Demonstrations of Phytoremediation of Lead Contaminated Soils Phytoremediation by Constructed Wetlands Factors Influencing Field Phytoremediations of Selenium-Laden Soils Phytoremediation of Selenium-Polluted Soils and Waters by Phytovolitization Metal Hyperaccumulator Plants: a Review of the Ecology and Physiology of a Biological Resource For Phytoremediation Of Metal-Polluted Soils - Potential for Phytoextraction of Zinc and Cadmium from Soils Using Hyperaccumulator Plants Improving Metal Hyperaccumulator Wild Plants to Develop Commercial Phytoextraction Systems: Approach and Progress Physiology of Zn Hyperaccumulation in Thlaspi caerulescens Metal-Specific Patterns of Tolerance, Uptake, and Transport of Heavy Metals in Hyperaccumulating and Non-Hyperaccumulating Metallophytes The Role of Root Exudates in Nickel Hyperaccumulation and Tolerance in Accumulator and Nonaccumulator Species of Thlaspi Engineered Phytoremediation of Mercury Pollution in Soil and Water Using Bacterial Genes Metal Tolerance in Plants: The Role of Phytochelatins and Metallothioneins The Genetics of Metal Tolerance and Accumulation in Higher Plants Ecological Genetics and the Evolution of Trace Element Hyperaccumulation in Plants The Role of Bacteria in the Phytoremediation of Heavy Metals Microphyte-Mediated Biogeochemistry and Its Role in In Situ Selenium Bioremediation In Situ Gentle Remediation Measures For Heavy Metal Polluted Soils In Situ Metal Immobilization and Phytostabilization of Contaminated Soils Phytoextraction or In-Place Inactivation (Phytostabilization): Technical, Economic, and Regulatory Considerations of the Soil-Lead Issue NTI/Sales Copy

Heavy Metal Contamination Along the Duhok-Zakho Highway Soils: Spatial analysis, Risks, and Ecological Implications

2025-06-25

Naveed Ul Hassan , Al Mizan , Basim S. A. Al Sulivany +1 more | Soil and Sediment Contamination An International Journal

Evaluation of Biochar, Sepiolite, and Their Composites for Immobilization Remediation of Cadmium Contamination Soil: Insights From Batch Experiments and Field Trials

2025-06-25

Chao Wang , Shan Gao , Tao Sun +3 more | Water Air & Soil Pollution

Application of Phosphogypsum and Manure for Reclaiming Saline-Sodic Soils in Tunisia: Geochemical Effects on Soil Properties and Leachate Composition

2025-06-25

Wiem Mezlini , Rim Ben Amor , Roua Gmati +4 more | Earth Systems and Environment

Variations in microbial community structure and extracellular enzyme stoichiometry in heavy metal-contaminated soil under different fertilization regimes

2025-06-25

Xian Huang , Shuting Tang , Xiaofei Xin +5 more | Applied Soil Ecology

Sustainable forest soil management for remediation of heavy metals contamination: integrating technologies and ecosystem health

2025-06-24

Abiodun Yusuff Moshood , Mukhtar Iderawumi Abdulraheem , Linze Li +6 more | Antonie van Leeuwenhoek

Remediation of polymetallic soils using biochar and earthworms: assessing heavy metal speciation, soil microbiological activities and earthworms’ responses

2025-06-24

Iteb Boughattas , Haifa Mannai , Lina Chebbi +7 more | Journal of Environmental Management

ASSESSMENT OF HEAVY METAL POLLUTION IMPACT ON SOIL CONDITIONS OF AKTOBE CITY

2025-06-24

Dauda Musa , B. Tussupova , L.S. Kurbanova +2 more | Geography and water resources

This article presents the results of a study on soil contamination levels in several districts of Aktobe – Kurmysh, Moscow, AFP (Aktobe Ferroalloy Plant), Aviakalashyk, and the 41st siding – … This article presents the results of a study on soil contamination levels in several districts of Aktobe – Kurmysh, Moscow, AFP (Aktobe Ferroalloy Plant), Aviakalashyk, and the 41st siding – by heavy metals such as zinc (Zn), cadmium (Cd), lead (Pb), and copper (Cu). The coefficients of anthropogenic concentration (Kc) and total pollution (Zc) were calculated. Soil samples from various areas were analyzed using atomic absorption spectrometry. In certain districts, particularly Kurmysh and Moscow, zinc and cadmium concentrations were found to exceed the maximum permissible concentrations (MPC). However, the total pollution index across all areas remained below Zc < 16, indicating a low overall level of contamination. The study highlights the need to implement measures aimed at reducing the toxic load on soils and restoring ecological balance.

Fabrication of nanocomposite zeolite granules for cadmium stabilization in contaminated soils

2025-06-24

Yu.V. Bondar , Vladislav Chrastný , Adéla Šípková +1 more | Environmental Pollutants and Bioavailability

Anthropogenic Dominance and Secondary Processes Drive Aerosol Iron Solubility in Asian Continental Outflow: Insights from Spring Qingdao, China

2025-06-24

Wenshuai Li , Yuxuan Qi , Guanru Wu +7 more | ACS ES&T Air

Which trace elements are accumulated in fronds of the Athyrium filix-femina fern? a study from the Czech Republic

2025-06-24

Ivan Suchara , Václav Procházka , Julie Sucharová +1 more | Environmental Monitoring and Assessment

Efficient Inorganic Stabilization Materials for Chromium and Arsenic Pollution in Water and Soil

2025-06-23

Anqi Wang , Zhiwen Dang , Yibo Wang +2 more | Applied Sciences

Chromium and arsenic, as prevalent heavy metal contaminants in water environments, pose significant threats to ecological systems and public health, necessitating urgent remediation measures. Conventional remediation techniques face challenges including … Chromium and arsenic, as prevalent heavy metal contaminants in water environments, pose significant threats to ecological systems and public health, necessitating urgent remediation measures. Conventional remediation techniques face challenges including high costs, prolonged remediation cycles, limited durability, and secondary contamination risks. While stabilization materials have emerged as promising solutions, the complex stabilization mechanisms for chromium and arsenic remain diverse and have not yet been fully elucidated. With reference to previous research, this paper systematically reviews inorganic stabilization materials for chromium and arsenic contamination remediation, with particular emphasis on elucidating their stabilization mechanisms and influencing factors. This review extensively evaluates various material types to inform practical applications, while highlighting investigations into novel composite materials, which advance technological innovation in water environmental remediation. It offers novel perspectives for addressing chromium and arsenic pollution challenges, potentially driving the development of more sustainable remediation strategies.

Assessing Tree Species for Monitoring and Mitigating Strontium Pollution in Urban Environments

2025-06-23

Şemsettin Kulaç , Ayşe ÖZTÜRK PULATOĞLU , İsmail Koç +2 more | Water Air & Soil Pollution

Abstract Air pollution, particularly heavy metal contamination, has emerged as a critical global issue, posing significant human and environmental health risks over the past century. Strontium (Sr), a highly hazardous … Abstract Air pollution, particularly heavy metal contamination, has emerged as a critical global issue, posing significant human and environmental health risks over the past century. Strontium (Sr), a highly hazardous heavy metal, even at small concentrations, is classified as a priority contaminant by international organizations due to its potential adverse effects. This study aimed to specify the most appropriate plant species for observing and mitigating Sr contamination. Samples were collected from Pseudotsuga menziesii (Douglas fir), Tilia tomentosa (Silver linden), and Fraxinus excelsior (European ash or common ash) growing in Düzce, Türkiye, one of the five most unclean towns in European countries according to the 2021 World Air Pollution Report. Variations in Sr concentrations over the past 60 years were analyzed based on tree species, tree organs, direction, and age group. The findings reveal that these species are unsuitable as biomonitors for tracking Sr pollution trends. However, all three species demonstrated the ability to accumulate significant levels of Sr in their wood, making them viable candidates for phytoremediation efforts. Among the species studied, European ash trees were the most effective in reducing Sr contamination, with the highest Sr accumulation in wood (11.36 mg/kg).

Potentially toxic elements pollution in the Musa Estuary: Ecological and human health implications

2025-06-23

Farahnaz Kianersi , Mehrnaz Shirmohammadi , Fereidoon Owfi +2 more | Marine Pollution Bulletin

The Musa Estuary ("Khur-e-Musa") in the northwestern Persian Gulf is a vital coastal ecosystem increasingly impacted by anthropogenic activities, including industrial discharge, maritime operations, and urban runoff. This study assesses … The Musa Estuary ("Khur-e-Musa") in the northwestern Persian Gulf is a vital coastal ecosystem increasingly impacted by anthropogenic activities, including industrial discharge, maritime operations, and urban runoff. This study assesses the seasonal distribution, bioaccumulation patterns, and ecological and human health risks associated with six potentially toxic elements (Cu, Pb, Cr, Ni, Zn, and Hg) across water, sediment, and selected marine organisms. Seasonal samples were collected and analyzed using flame atomic absorption spectrophotometry. Muscle tissues from four fish species (Platycephalus indicus, Euryglossa orientalis, Sillago sihama, and Chirocentrus nudus) and one shrimp species (Metapenaeus affinis) were examined. Nickel was the most abundant metal across all matrices. Concentrations of Cu in water, Hg in sediment, and Ni in both exceeded established environmental quality guidelines. Among the biota, P. indicus and E. orientalis exhibited the highest bioaccumulation levels (excluding Cu), whereas S. sihama showed the lowest. The bioaccumulation factor for Hg exceeded 1 in most species. Human health risk assessments indicated low estimated daily intake (EDI), target hazard quotient (THQ), and hazard index (HI), suggesting minimal non-carcinogenic risk (HI < 1). However, the carcinogenic risk (TCR) from Ni exposure exceeded acceptable thresholds (TCR > 10-4) in most species, particularly for adult consumers. These findings highlight nickel pollution as a critical environmental and public health concern in the Musa Estuary. Enhanced regulatory control and continuous monitoring are recommended to mitigate contamination and protect ecosystem and food safety.

Lowering pH enhances copper toxicity: A novel strategy for controlling harmful algal blooms and off-flavors

2025-06-23

Ashley V. Hennessey , Michael McDonald , Philip J. Johnson +7 more | Ecotoxicology and Environmental Safety

Pig manure-derived DOM enhances soil Cd adsorption to reduce Cd accumulation in rice organs

2025-06-23

Xiaobo Huang , Wenjian Liu , Juanli Yun +7 more | International Journal of Phytoremediation

ABSTRACTSDissolved organic matter (DOM) has different functions that affect the absorption and resolution behavior of soil Cd. We investigated two exogenous DOM (pig manure and rice straw) in soils, analyzed … ABSTRACTSDissolved organic matter (DOM) has different functions that affect the absorption and resolution behavior of soil Cd. We investigated two exogenous DOM (pig manure and rice straw) in soils, analyzed their structural features, and explored their effect on Cd behavior in soil. Our results showed that the two exogenous DOM contain similar functional groups, including carboxylic acids, alcohols, alkanes, phenols, and polysaccharides. The molecular weight of DOM in F2 to F4 (3 kD-30 kD) have the effect of activating and migration of Cd. Pot and field experiments demonstrate that DOM from pig manure is more effective in enhancing soil Cd adsorption and reduces the exchangeable Cd in soil during the seedling stage of rice. Under the treatment of pig manure and straw, the Cd in the roots, stems and leaves of rice decreased by 14%, 11%, 10%, and 8%, 14%, 10%, respectively. It indicates that pig manure application reduces Cd accumulation in rice roots, and straw application reduces it in rice stems. Overall, after applying pig manure and rice straw, Cd concentration in rice grains decreased by 36% and 17%, respectively. This study is conducive to a further understanding the behavior and morphological changes of Cd in paddy soil.

Identification of hydrogen oxidation coupled with antimonate reduction, a novel antimony biogeochemical cycling, in two contrasting antimony-contaminated environments

2025-06-23

Y.-W. Wang , Xiaoxu Sun , Yubo Cao +7 more | Microbiome

Antimony (Sb) contamination is a serious environmental problem owing to its extensive production worldwide. High concentration of Sb is often detected in mining-contaminated environments, leading to the risk of contamination … Antimony (Sb) contamination is a serious environmental problem owing to its extensive production worldwide. High concentration of Sb is often detected in mining-contaminated environments, leading to the risk of contamination to the downstream environments through waterflow. Microorganisms play an important role in the fate and transport of Sb. Microbially mediated Sb(V) reduction performs an important environmental service because it can reduce the mobility of Sb and prevent the transport of Sb to downstream. As a commonly found intermediate in mining and aquatic environments, molecular hydrogen (H2) may serve as an electron donor to drive Sb(V) reduction, although this biogeochemical process has not yet been reported. In this study, Sb(V) reduction coupled with H2 oxidation (HOSbR) was identified in two contrasting Sb-contaminated habitats, i.e., oligotrophic tailings and organic-rich river sediments. DNA-stable isotope probing identified Azospirillum and Hydrogenophaga spp. as the bacteria potentially responsible for HOSbR in oligotrophic tailings and organic-rich river sediments, respectively. Further, Azospirillum spp. were identified as keystone taxa in tailings. The causal inference framework suggested that Azospirillum spp. may contribute to the increased nitrogenase activity in oligotrophic tailings during HOSbR. These results suggest that bacteria responsible for HOSbR may play various important ecological roles including reducing the mobility of Sb and improving nutrient conditions in oligotrophic habitats. Video Abstract.

Remediation of heavy metal-contaminated soils by washing with green compost humic substances

2025-06-23

Ilwan Meignant , Lavinia M. Stancampiano , Mariavittoria Verrillo +5 more | Environmental Chemistry Letters

Water quality, heavy metal contamination, and ecological risk assessment in Asejire reservoir, Nigeria

2025-06-23

Oluwafemi A. Olowojuni , Folasade Damilola Amulejoye , Bamijoko B. Ikuesan +3 more | Journal of Freshwater Ecology

External drivers of heavy metal bioavailability and probabilistic ecological risk in water-level-fluctuating wetlands

2025-06-23

Huan Zeng , Mingjun Ding , Hua Zhang +7 more | Ecological Indicators

Effects of wheat straw and sulfate application at different levels on the uptake and accumulation of cadmium in brown rice under different cadmium stress

2025-06-23

Yifei Li , Xianlin Ke , Yanhua Qiu +4 more | Chemical and Biological Technologies in Agriculture

Highly reactive iron in Ross Sea surface sediments: Spatial heterogeneity, environmental controls and implications for Antarctic shelf deposition

2025-06-23

Wenhao Huang , Jun Zhao , Xiaoze Guo +6 more | Science China Earth Sciences

Mitigation of heavy metal contamination by organo-alkaline amendments and phytoremediation of abandoned mine sites

2025-06-22

Tenindja Louise Coulibaly , Laila Mandi , Abdessamed Hejjaj +4 more | Environmental Technology

The research study investigates a remediation technique that combines phytoremediation with organo-alkaline amendments on a laboratory scale to address heavy metal contamination in waste from the Kettara mine in Marrakech, … The research study investigates a remediation technique that combines phytoremediation with organo-alkaline amendments on a laboratory scale to address heavy metal contamination in waste from the Kettara mine in Marrakech, Morocco. The experiment involved pots filled with mine tailings mixed with various alkaline inorganic amendments (marble, snail shell, phosphate sludge), with and without organic amendments (sheep manure) in different combinations with Tagetes erecta L. (Aztec Marigold) culture. Key physicochemical parameters and trace metals (copper, lead, zinc) were measured in the tailings before and after treatment, and the metal content of the harvested plants was also analysed. The translocation factor (TF), bioconcentration factor (BCF), and enrichment coefficient (ECf) were evaluated. Results indicated that the initially extremely acidic pH of the tailings (1.23) was neutralised to 7.82 after treatment with alkaline inorganic amendments, enhancing plant viability in the pots. After rehabilitation, the concentrations of copper, zinc, and lead metals were significantly reduced, particularly with the combination of snail shell and phytoremediation, compared to mine tailings alone, which did not encourage any plant growth. Most extracted metals accumulate in the plant's roots, making Tagetes erecta L. (Aztec Marigold) a suitable candidate for phytostabilization of these contaminants.

Assessment of human health risk associated with heavy metals from the consumption of Swiss chard ( <i>Beta vulgaris</i> L.) exposed to low-quality irrigation water of different types

2025-06-22

Bahati J. Manegabe , Titus A.M. Msagati , Marie-Médiatrice Kikongo Ntabugi +1 more | International Journal of Environmental Health Research

Population growth requires food production and supports wastewater reuse for irrigation, practice which introduces toxic metals into soil, severely affecting plant and human health. Water/vegetables/soil samples were analyzed for As, … Population growth requires food production and supports wastewater reuse for irrigation, practice which introduces toxic metals into soil, severely affecting plant and human health. Water/vegetables/soil samples were analyzed for As, Cd, Co, Cu, Cr, Pb, Zn, Mn, and Fe utilizing ICP-MS. Adults and children health risk was evaluated using hazard quotient (HQ). Electrical conductivity, pH, and organic matter varied according to irrigation water and soil samples. Heavy metals between 0.05 and 781.97 mg/kg were present at lower concentrations in vegetables irrigated with tap water (TV1), whereas heavy metals between 1275 and 47 mg/kg exhibited reduced concentrations in soil exposed to tap water (TS1). All the heavy metal concentrations between 0.03 and 219.7 mg/L were lower in tap water. HQ associated with 77.8% metals intake via TV1 was lower in both children and adults. While the HQ of almost 85% metal consumption by adults through vegetables was below one, HQ of nearly 83% of metals consumption exceeded one. This implies that the risk associated with heavy metals in children was almost 100% high than adults. Therefore, remediation technology using volcanic adsorbent rocks is suggested to remove toxic metals from water used to irrigate vegetables to unsure food security and human health.

Synergistic enhancement of heavy metals removal and soil nutrients for agricultural soils using novel agro-waste biomass derived washing agents

2025-06-22

Shuai Yang , Chen Tu , Guoming Liu +7 more | Environmental Technology & Innovation

Propagation of Atriplex halimus (Mediterranean Saltbush) in Multi-Contaminated Mine Tailings by Unrooted Cuttings

2025-06-22

Marta Canu , Stefano Milia , Stefano Ubaldini +3 more | Applied Sciences

Phytotechnologies offer sustainable solutions for remediating mine residues by combining site rehabilitation with the potential recovery of secondary and critical raw materials (SRMs and CRMs, respectively), contributing to resource efficiency … Phytotechnologies offer sustainable solutions for remediating mine residues by combining site rehabilitation with the potential recovery of secondary and critical raw materials (SRMs and CRMs, respectively), contributing to resource efficiency strategies. This study explored the direct propagation of Atriplex halimus unrooted cuttings into metal-contaminated mine tailings, assessing survival, biomass production, and trace metal accumulation. Treatments were carried out on mine tailings, with and without the addition of organic and inorganic amendments, and on commercial soil as a control. After an 8-week preliminary trial, Atriplex halimus demonstrated moderate survival and growth without phytotoxic symptoms, despite elevated trace metal concentrations. Significant accumulation of zinc, lead, and cadmium as model contaminants in the biomass of Atriplex halimus (up to 495.4, 31.9, and 1.2 mg kg−1, respectively), as well as magnesium and manganese as model CRMs (2081 and 87.8 mg kg−1, respectively) was observed in aerial tissues, comparable with traditional, though more labor-intensive propagation methods. Plants’ ability to accumulate metals was high in the presence of amendments added to promote biomass growth. These results highlight the significance of direct propagation by unrooted cuttings as a promising, low-cost strategy to initiate site restoration in metal-contaminated areas and warrant further investigation under field conditions and over longer durations.

Spatial Distribution and Management of Trace Elements in Arid Agricultural Systems: A Geostatistical Assessment of the Jordan Valley

2025-06-21

Mamoun A. Gharaibeh , Bernd Marschner , Nicolai Moos +1 more | Land

Sustainable land management in arid regions such as the Jordan Valley (JV) is essential as climate pressures and water shortages intensify. The extended use of treated wastewater (TWW) for irrigation, … Sustainable land management in arid regions such as the Jordan Valley (JV) is essential as climate pressures and water shortages intensify. The extended use of treated wastewater (TWW) for irrigation, while necessary, brings potential risks related to the accumulation of trace elements and their impact on soil health and food safety. This study examined the spatial distribution, variability, and potential sources of five trace elements (Co, Hg, Mo, Mn, and Ni) in agricultural soils across a 305 km2 area. A total of 127 surface soil samples were collected from fields irrigated with either TWW or freshwater (FW). Trace element concentrations were consistently higher in TWW-irrigated soils, although all values remained below WHO/FAO recommended thresholds for agricultural use. Spatial modeling was conducted using both ordinary kriging (OK) and empirical Bayesian kriging (EBK), with EBK showing greater prediction accuracy based on cross-validation statistics. To explore potential sources, semivariogram modeling, principal component analysis (PCA), and hierarchical clustering were employed. PCA, spatial distribution patterns, correlation analysis, and comparisons between TWW and FW sources suggest that Co, Mn, Mo, and Ni are primarily influenced by anthropogenic inputs, including TWW irrigation, chemical fertilizers, and organic amendments. Co exhibited a stronger association with TWW, whereas Mn, Mo, and Ni were more closely linked to fertilizer application. In contrast, Hg appears to originate predominantly from geogenic sources. These findings provide a foundation for improved irrigation management and fertilizer application strategies, contributing to long-term soil sustainability in water-limited environments like the JV.

Adsorption and desorption effect of modified bentonite on soil heavy metal Pb/Cd and the feasibility assessment of reducing the ecotoxicity

2025-06-21

Yang Xue , Yuancheng Li , Min Gan +6 more | Environmental Sciences Europe

Metal contamination along the French Mediterranean coast: From background to current status

2025-06-21

Daniel Santos Mulholland , Marcus Vinicius Sousa Conceição , Nicolas Briant +2 more | Marine Pollution Bulletin

The French Mediterranean coast has a long history of anthropogenic metal contamination, yet current contamination levels remain largely unquantified. This study aims to provide a comprehensive overview of metal accumulation … The French Mediterranean coast has a long history of anthropogenic metal contamination, yet current contamination levels remain largely unquantified. This study aims to provide a comprehensive overview of metal accumulation along the coastline by establishing natural background levels, identifying spatial contamination patterns, and assessing associated ecological risks. Major elements (Al, Fe) and trace metals (Mn, Pb, Zn, Cd, Cu) were measured in surface sediments from 74 sites and in three sediment cores using ICP-MS, while mercury (Hg) was analyzed using an AMA instrument. Natural background concentrations were determined based on the depth layers of three sediment cores that predate the year 1917. This timeframe has been recognized as the pre-industrial period by applying multivariate change point analysis. Approximately 60 % of sediment samples exhibited a Pollution Load Index (PLI) above 1, indicating significant anthropogenic enrichment across the coast. The Mean Effects Range Median Quotient (m-ERM-Q) exceeded 1 only at Cortiou and Toulon, suggesting a localized ecological risk. At Cortiou, Cd (2.85 mg/kg) and Cu (212.0 mg/kg) were between Effect Range-Low (ERL) and Effect Range-Median (ERM) thresholds, while Pb (264.0 mg/kg), Hg (6.73 mg/kg), and Zn (654.0 mg/kg) were above ERM, due to wastewater discharge. In Toulon Bay, Pb (79.34 mg/kg) and Cu (50,00 mg/kg) were between the ERL and ERM, while Hg (5.57 mg/kg) exceeded the ERM, linked with long-term naval and industrial activities. These findings demonstrate pervasive metal enrichment and ecological risks driven by different sources and highlight the urgent need for targeted mitigation strategies.

Effects of citric acid on Cd speciation in biochar-amended contaminated soils

2025-06-21

Bingyao Xu , Jiayu Xu , Meiqi Wang +4 more | Environmental Geochemistry and Health

Application of Biochar in the Remediation of Heavy Metal Pollution in Agricultural Soils

2025-06-20

Lin Ma | Scientific Journal of Technology

As industrialization progresses, heavy metal contamination in agricultural soils has become a pressing concern, threatening the safety of food crops, the balance of ecosystems, and human well-being. This environmental issue … As industrialization progresses, heavy metal contamination in agricultural soils has become a pressing concern, threatening the safety of food crops, the balance of ecosystems, and human well-being. This environmental issue has garnered significant attention due to its widespread impact. Major contributors to soil contamination include the release of industrial effluents, air emissions, solid waste, and the excessive application of chemical fertilizers and pesticides. The ongoing accumulation of heavy metals compromises soil health and hinders plant development. Biochar, an emerging soil amendment, has demonstrated great potential in addressing heavy metal pollution in agricultural environments. Its distinctive characteristics—such as high porosity and extensive surface area—enable it to effectively adsorb and stabilize heavy metal ions. Moreover, biochar contributes to improving soil fertility, enhancing moisture retention, optimizing soil structure, and promoting microbial diversity, thereby supporting healthier crop growth. This study investigates the role of biochar in remediating heavy metal-contaminated agricultural soils and aims to provide innovative and sustainable strategies for environmental restoration.

Adaptive mechanisms of moss (Campylopus schmidii) to Cr(Ⅵ) stress in pyrite-mining polluted ecosystems: Integrating biochemical, structural, and molecular perspectives

2025-06-20

Huayan Huang , Xin Zheng , Tao Shan +7 more | Environmental Pollution

Potentially toxic metal contamination in semi-arid agricultural soils: sources, risk analysis, and spatial distribution

2025-06-20

Manjit Kaur , Jaskaran Kaur , Anil K. Sood +7 more | Environmental Monitoring and Assessment

Multivariate analysis and seasonal dynamics of toxic trace elements and antibiotics in shrimp (Penaeus vannamei, boon, 1931) aquaculture: Impacts on human and environmental health

2025-06-20

Ulaganathan Arisekar , R. Jeya Shakila , Rajendran Shalini +7 more | Marine Pollution Bulletin

Modeling and interpreting the probability of soil heavy metal contamination in China

2025-06-20

Bin Zhang , Yudan Zhao | Human and Ecological Risk Assessment An International Journal

Elements pollution and ecological risk assessment of coastal sediments along the Nile Delta

2025-06-20

Mohamed A. Hassaan , Amr G. Dardeer , Ahmed El Nemr | Scientific Reports

Abstract The Nile Delta coastal area surface sediments were evaluated for twenty-five elements. Inductively coupled plasma-mass spectroscopy (ICP-MS method) was used to analyze the digested solutions, previously filtered using discrete … Abstract The Nile Delta coastal area surface sediments were evaluated for twenty-five elements. Inductively coupled plasma-mass spectroscopy (ICP-MS method) was used to analyze the digested solutions, previously filtered using discrete 0.2 μm PTFE syringe filters according to USEPA protocols. Potentially toxic elements (PTEs) and pollution levels were estimated using several indices. Pollution guides such as the enrichment factor (EF), contamination degree ( C d ), geoaccumulation index ( I geo ), and pollution load index (PLI) are mainly determined by actually toxic elements such as Cr, Co, Cd, Hg and Pb, while Principal component analysis (PCA), concerned with the distribution of all elements in sediment to determine the sources of elements. The following is the order of the EF values: Mn < Cu < Zn < Ni < Pb < Cr. The areas under investigation showed no pollution with Cr, Cu, Mn, Ni, Pb, or Zn, as indicated by their ( I geo ≤0) values and C d (< 1.5). Significant connections between Mn, Fe, Cr, Co, and Ni values were observed, indicating comparable origins. In the current study, the children’s Hazard Quotient (HQ) results for the dermal exposure pathway are low, but adult values are 3–4 times higher. The chronic daily intake (CDI Dermal ) and carcinogenic risk ( CR Dermal ) through dermal absorption were also investigated.

Enhancing cadmium stress resilience in rice seedlings via Bacillus pseudomycoides: modulation of heavy metal transporters and physiological responses for sustainable agriculture

2025-06-20

Al Imran , Md. Ariful Islam , Suvro Biswas +7 more | Environmental Science and Pollution Research

Advancing Phytoremediation: A Review of Soil Amendments for Heavy Metal Contamination Management

2025-06-20

Ahmed A. Tamma , Krzysztof Lejcuś , W. Fialkiewicz +1 more | Sustainability

Heavy metal (HM) contamination poses a major threat to environmental health, agriculture and human well-being, requiring effective and sustainable remediation strategies. Phytoremediation, an eco-friendly and cost-effective approach, is widely used … Heavy metal (HM) contamination poses a major threat to environmental health, agriculture and human well-being, requiring effective and sustainable remediation strategies. Phytoremediation, an eco-friendly and cost-effective approach, is widely used for the remediation of HM-contaminated soils. Although phytoremediation holds considerable potential in the extraction, stabilisation and degradation of HMs, its effectiveness is often constrained by limited metal bioavailability, plant stress under toxic conditions and slow metal uptake rates. To address these limitations, this review examines the integration of various soil amendments—the application of biochar, compost, plant exudates, microbial agents and chelating agents—to enhance phytoremediation efficiency. This review critically evaluates empirical evidence on the effectiveness, scalability, economic feasibility and environmental impact of these amendments. By synthesising recent studies, this review advances the understanding of amendment-assisted phytoremediation as a viable solution for treating HM-contaminated soils. In addition, this review identifies practical applications, discusses limitations and explores the potential synergies of these amendments to optimise phytoremediation strategies, ultimately contributing to more effective and sustainable environmental cleanup efforts.

Machine Learning-Based Analysis of Heavy Metal Migration Under Acid Rain: Insights from the RF and SVM Algorithms

2025-06-19

Jie Yao , Jianping Qian , Dongru Ji | Minerals

Acid rain alters soil chemistry significantly and is a key driver of heavy metal pollution. This study investigates the environmental impact of acid rain-induced heavy metal migration in the Siding … Acid rain alters soil chemistry significantly and is a key driver of heavy metal pollution. This study investigates the environmental impact of acid rain-induced heavy metal migration in the Siding Lead–Zinc mining area in south China. Tailings, surrounding soils, and riverbed sediments were examined through simulated acid rain soil column leaching experiments. Leachate parameters—including pH, redox potential (Eh), total dissolved solids (TDSs) and heavy metal concentrations—were used to develop machine learning models (Random Forest and Support Vector Machine) to quantify the influence of environmental factors on metal migration. The results showed that leachates were generally alkaline and reductive after leaching, with Cd, Pb, and Zn as the dominant migrating metals. Leachates from tailings and nearby soils exceeded safe drinking water standards, with significantly higher cumulative metal release than other samples. The RF model outperformed the SVM model in predicting heavy metal concentrations. Feature importance analysis revealed that, beyond sample characteristics, pH and Eh were critical factors driving metal migration. Zn and Cd showed strong sensitivity to these parameters, with pH and Eh contributing over 80% to their migration. The findings highlight that acid rain can enhance the solubility and migration of heavy metals, posing a serious threat to the quality of surrounding water and underscoring the requirement for effective mitigation strategies to protect the ecological environment in mining areas.

Vvmrp1, Vvmt1, and Vvmt2 Co-Expression Improves Cadmium Tolerance and Reduces Cadmium Accumulation in Rice

2025-06-19

Hongjuan Han , Yu Wang , Cen Qian +2 more | Agronomy

Cadmium (Cd) contamination in agricultural soils severely threatens rice production and food safety. To address this issue, this study developed transgenic rice lines co-expressing three Vitis vinifera genes: the ABCC … Cadmium (Cd) contamination in agricultural soils severely threatens rice production and food safety. To address this issue, this study developed transgenic rice lines co-expressing three Vitis vinifera genes: the ABCC transporter Vvmrp1 and metallothioneins Vvmt1 and Vvmt2. AlphaFold computational modeling confirmed the conserved ABCC-type transporter domain in VvMRP1. Under hydroponic conditions, transgenic rice showed remarkable Cd tolerance, surviving 30 mM Cd (lethal to wildtype, WT) without growth penalties, and exhibited 62.5% survival at 1 mM Cd vs. complete wild-type mortality. Field-relevant Cd exposure (1 mM) reduced Cd accumulation to 35.8% in roots, 83% in stems, and 76.8% in grains compared to WT. Mechanistic analyses revealed that Vvmrp1 mediates cellular Cd efflux while Vvmt1 and 2 chelate free Cd ions, synergistically inhibiting Cd translocation. Transgenic plants also maintained better Fe, P, and Mg homeostasis under Cd stress. This study pioneers the co-expression of a transporter with metallothioneins in rice, demonstrating their complementary roles in Cd detoxification without pleiotropic effects from endogenous gene modification. The findings provide an effective genetic strategy for cultivating low-Cd rice in contaminated soils, offering significant implications for food safety and sustainable agriculture.

Multi-factor interaction perspective: machine learning-based analysis of Ni2⁺ adsorption onto soil

2025-06-19

Yingdong Wu , Yu Jiang , Zixin Zeng +7 more | Environmental Geochemistry and Health

Integrated Deterministic and Probabilistic Methods Reveal Heavy Metal-Induced Health Risks in Guizhou, China

2025-06-19

Qinju Li , Dashuan Li , Zelan Wang +3 more | Toxics

Due to high geological background and intensive mining activities, soils are prone to heavy metals (HMs) accumulation and ecological fragility in Guizhou Province, China. A total of 740 topsoil samples … Due to high geological background and intensive mining activities, soils are prone to heavy metals (HMs) accumulation and ecological fragility in Guizhou Province, China. A total of 740 topsoil samples were therefore collected, and aimed to determine the concentrations of As, Cd, Cr, Hg, and Pb, estimate the ecological pollution, and evaluate the carcinogenic and non-carcinogenic health risks to humans. Results showed As (1.08%) and Cd (24.46%) in soil exceeded standards. The Igeo showed that Cr (1.49%) and Hg (31.62%) in soil were at light pollution levels; single factor pollution index (PI) showed that Cd (21.35%) in soil was mildly polluted; risk index (RI) as at a low risk level. Notably, both deterministic and Monte Carlo analyses revealed unacceptable carcinogenic risks for As and Cr in children, with traditional methods potentially underestimating As risks. Moreover, Target-Organ Toxicity Dose (TTD) revealed soil HMs as a higher risk to hematological health, with notable health risks posed by Pb in children. It is noted that spatial distribution analysis suggested that the southwestern region of Guizhou Province should be prioritized for health risk management and control. By integrating the uniqueness of geological environments, multi-dimensional health risk assessments, and spatial distributions, the present study provides a scientific basis for assessing HMs pollution risks and soil health risks in the karst regions.

The Effect of Native Plant Diversity on the Success of Invasive Species in Polluted Soils

2025-06-19

Qaiser Javed , Jianfan Sun , Marko Černe +7 more | Ecotoxicology

Heavy metal contamination and ecological risk assessment in drainage channel sediments from urban and agricultural areas

2025-06-19

Radovan Savić , Milica Stajić , Ema Kostešić +4 more | Journal of Environmental Management

Element concentrations in sediments and marine bivalves (clam Tivela mactroides and oyster Crassostrea rhizophorae) from the central Venezuelan coasts: a comparative study

2025-06-19

José Azócar , Juan A. Alfonso , Abrahan Mora | Marine Pollution Bulletin

Physiological performance of Linum usitatissimum (Flax) in coal tailing-amended soils

2025-06-18

P. Mhlanga , M. Le Roux , J.M. Berner | Research Square (Research Square)

<title>Abstract</title> Coal tailings (CT), a by-product of coal mining, pose environmental risks due to their acidity and heavy metal content. This study assessed the potential of using coal tailings as … <title>Abstract</title> Coal tailings (CT), a by-product of coal mining, pose environmental risks due to their acidity and heavy metal content. This study assessed the potential of using coal tailings as a soil amendment for growing <italic>Linum usitatissimum</italic> (flax), focusing on germination, biomass production, and photosynthetic efficiency. Two coal tailings from the Witbank coalfield in Mpumalanga, South Africa (Coal A and Coal B) were tested individually and in combination with soil, with and without organic fertilizer. Pure CT treatments significantly reduced germination and seedling survival possibly due to high concentrations of lead and arsenic. However, mixing CT with soil improved germination (up to 80%) and seedling establishment by reducing metal toxicity. Chlorophyll <italic>a</italic> fluorescence analyses revealed improved photosynthetic performance in soil-amended and fertilized treatments, particularly where Coal A was mixed with soil. Fertilization enhanced biomass accumulation and photosystem II efficiency, with the highest performance indices observed in fertilized Coal A + Soil. These findings suggest that soil amendments and fertilization can partially mitigate CT toxicity, offering a potential strategy for CT reuse in vegetation establishment.

Biomass production and heavy metal uptake by crops grown in two contrasting soils amended with sewage sludge

2025-06-18

Laura Arló , Andrés Beretta , Virginia Takata +3 more | Discover Soil.

Assessment of heavy metal pollution from flooded rice farms in Hadejia LGA of Jigawa State Nigeria: an impact of climate change

2025-06-18

J Simon , Efiong A. Ibanga , E. P. Inyang +4 more | Environmental Monitoring and Assessment

Arsenic, cadmium, copper and zinc in two marlin species from the southern Gulf of California: risk assessment and variations with environmental factors

2025-06-18

J. Ruelas-Inzunza , Brigitte Dimelsa Gil-Manrique , María Mercedes Meza‐Montenegro +6 more | Regional Studies in Marine Science