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Toxics
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Impact of Heavy Metal Contamination on Soil Environment and Advances...
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Impact of Heavy Metal Contamination on Soil Environment and Advances in Remediation Strategies

A special issue of Toxics (ISSN 2305-6304). This special issue belongs to the section "Metals and Radioactive Substances".

Deadline for manuscript submissions: closed (16 January 2024) | Viewed by 3932

Special Issue Editors

Dr. Yanan Wan

E-Mail Website
Guest Editor
College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
Interests: soil; heavy metal pollution; agronomy
Special Issues, Collections and Topics in MDPI journals
Dr. Yanyun Zhu

E-Mail Website
Guest Editor
Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Interests: heavy metal; plant physiology; antibiotic resistance

Special Issue Information

Dear Colleagues,

Soil can be contaminated with heavy metals through the disposal of high metal waste, mine tailings, synthetic fertilizers, manures, wastewater irrigation, atmospheric deposition, and sewage sludge. However, most of the inorganic pollutants in soils do not undergo chemical and microbial degradation and their concentration persists in soil for long periods of time after their application to the soil. Soil contamination of metals can cause severe problems in  living systems and damage the ecosystem, via direct ingestion of contaminated food, physical contact with polluted soil, or through the food chain. Therefore, it is urgent to consider novel and effective approaches for the removal of such heavy metals from soil–plant systems.

Therefore, this Special Issue on “Impact of Heavy Metal Contamination on Soil Environment and Advances in Remediation Strategies” seeks high quality works focusing on the latest research based on the fate and ecological effect of heavy metals in the soil environment, as well as novel strategies for reducing their risk in soil–plant systems. Relevant researchers throughout the world are invited to contribute their papers in this Special Issue. Topics include, but are not limited to:

  • Migration and transformation of heavy metals in soil-plant system.
  • The ecotoxicological process and effect of heavy-metals-contaminated soil. 
  • Source apportionment, risk assessment and prediction (models and methods) of heavy metals in soil.
  • Remediation strategies for heavy metal pollution in soil based on physico-chemical or biological methods and their applications.
  • Agronomic measures for the control of heavy metals.

Dr. Yanan Wan
Dr. Yanyun Zhu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Toxics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • heavy metal
  • ecotoxicological effects
  • food safety
  • risk assessment
  • soil amendment
  • phytoremediation
  • microorganism remediation
  • agronomic measure

Published Papers (2 papers)

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Research

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15 pages, 3063 KiB  
Article
Biochar Derived from Urban Green Waste Can Enhance the Removal of Cd from Water and Reduce Soil Cd Bioavailability
by Xiang Li, Paramsothy Jeyakumar, Nanthi Bolan, Lianxi Huang, Muhammad Saqib Rashid, Zhongzhen Liu, Lan Wei and Hailong Wang
Toxics 2024, 12(1), 8; https://doi.org/10.3390/toxics12010008 - 21 Dec 2023
Cited by 1 | Viewed by 1437
Abstract
The beneficial utilization of potentially increasing urban green waste (UGW) is critical for sustainable urban development in China. In this study, UGW was pyrolyzed at different temperatures, and the resulting biochar was used to amend Cd-contaminated soils to grow cabbage. Our results showed [...] Read more.
The beneficial utilization of potentially increasing urban green waste (UGW) is critical for sustainable urban development in China. In this study, UGW was pyrolyzed at different temperatures, and the resulting biochar was used to amend Cd-contaminated soils to grow cabbage. Our results showed that the Cd adsorption capacity of UGW-biochar was positively correlated with the surface area, O/C, and (O+N)/C value of biochar. Furthermore, UGW-biochar was incorporated into three Cd-contaminated soils, including one acidic soil and two neutral soils, to assess its impact on the availability of Cd. The most substantial reduction in the concentration of available Cd was observed in the acidic soil, of the three tested soils. In the neutral soils, a more substantial reduction was found in the heavily Cd-contaminated soil compared to the lightly Cd-contaminated soil. UGW-biochar amendments to the three Cd-contaminated soils resulted in an increase in the cabbage biomass in acidic soil, whereas in neutral soils, it increased in lightly contaminated soils but decreased in heavily contaminated soils. Additionally, the Cd bioaccumulation factor (BCF), translocation factor (TF), and removal efficiency (RE), as impacted by the biochar application, were calculated in the lightly Cd-contaminated soil–cabbage system. The BCF decreased from 5.84 to 3.80 as the dosage of the UGW-biochar increased from 0% to 3%, indicating that the UGW-biochar immobilized Cd and reduced its bioaccumulation in cabbage roots. Based on our investigations, UGW-biochar effectively immobilizes Cd by reducing its mobility and bioavailability in a lightly contaminated environment matrix. Full article
(This article belongs to the Special Issue Impact of Heavy Metal Contamination on Soil Environment and Advances in Remediation Strategies)
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Review

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17 pages, 1971 KiB  
Review
Heavy Metals in Agricultural Soils: Sources, Influencing Factors, and Remediation Strategies
by Yanan Wan, Jiang Liu, Zhong Zhuang, Qi Wang and Huafen Li
Toxics 2024, 12(1), 63; https://doi.org/10.3390/toxics12010063 - 12 Jan 2024
Cited by 4 | Viewed by 2086
Abstract
Soil heavy metal pollution is a global environmental challenge, posing significant threats to eco-environment, agricultural development, and human health. In recent years, advanced and effective remediation strategies for heavy metal-contaminated soils have developed rapidly, and a systematical summarization of this progress is important. [...] Read more.
Soil heavy metal pollution is a global environmental challenge, posing significant threats to eco-environment, agricultural development, and human health. In recent years, advanced and effective remediation strategies for heavy metal-contaminated soils have developed rapidly, and a systematical summarization of this progress is important. In this review paper, first, the anthropogenic sources of heavy metals in agricultural soils, including atmospheric deposition, animal manure, mineral fertilizers, and pesticides, are summarized. Second, the accumulation of heavy metals in crops as influenced by the plant characteristics and soil factors is analyzed. Then, the reducing strategies, including low-metal cultivar selection/breeding, physiological blocking, water management, and soil amendment are evaluated. Finally, the phytoremediation in terms of remediation efficiency and applicability is discussed. Therefore, this review provides helpful guidance for better selection and development of the control/remediation technologies for heavy metal-contaminated agricultural soils. Full article
(This article belongs to the Special Issue Impact of Heavy Metal Contamination on Soil Environment and Advances in Remediation Strategies)
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