Green Amendments for the Remediation of Potentially Toxic Elements in Soil and Water

A special issue of Toxics (ISSN 2305-6304). This special issue belongs to the section "Toxicity Reduction and Environmental Remediation".

Deadline for manuscript submissions: 13 December 2024 | Viewed by 1236

Special Issue Editors


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Guest Editor
Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
Interests: soil and water remediation; potentially toxic elements; environmental remediation; soil amendments; immobilization; adsorption; soil and water chemistry; environmental impact assessment; bioremediation; phytoremediation; biochar; functional biochar
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Guest Editor
College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan
Interests: soil remediation; heavy metal remediation; environmental remediation; soil amendments; immobilizations; food safety; environmental impact assessment; Cd accumulation; abiotic stresses; bioremediation; phytoremediation; biochar; rhizosphere

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Guest Editor
School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi’an, China
Interests: synthesized programmable carbon nanosheets derived from agriculture wastes (crop residues) via top-down approaches (ball-milling, ultrasonication, liquid-phase and chemical exfoliation) and applied as adsorbent/amendment in metal-contaminated water and soil matrices; on remediation of heavy metal-contaminated water and soil using exfoliated biochar; development and use of crop-residue-based biochars for MCDI electrode manufacture (desalination)

Special Issue Information

Dear Colleague,

The developments in the agricultural sector, as well increased urbanization and inadequate environmental protective measures, have resulted in a notable increase in environmental degradation, specifically in terms of soil pollution and water contamination with potentially toxic elements (PTEs). Mainly, PTEs are considered an issue when they are recorded in excessive amounts in soil or water. In addition, they have demonstrated their potential to pass through the food chain by accumulating in dietary components, hence presenting a significant risk to human health and environmental safety. Therefore, to reduce the availability of PTEs to humans, viable and environmentally friendly materials should be developed. In this regard, green components, such as organic manure, biochar, functional biochar, compost, etc., can serve as viable strategies to reduce PTE availability and to increase environmental sustainability. This Special Issue aims to collect original research and review articles on all aspects of green remediation techniques for soil and water remediation that are contaminated with PTEs. Each article will describe the specific green materials and the mechanisms behind their potential role in alleviating PTEs in the soil and water systems.

Dr. Yasir Hamid
Dr. Qi Tao
Dr. Muhammad Haris
Guest Editors

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Keywords

  • potentially toxic elements
  • soil pollution
  • water pollution
  • remediation
  • green amendments
  • functional materials
  • complexation
  • environmental sustainability

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Published Papers (1 paper)

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Research

15 pages, 2113 KiB  
Article
Predictive Machine Learning Model to Assess the Adsorption Efficiency of Biochar-Heavy Metals for Effective Remediation of Soil–Plant Environment
by Xiang Li, Bing Chen, Weisheng Chen, Yilong Yin, Lianxi Huang, Lan Wei, Mahrous Awad and Zhongzhen Liu
Toxics 2024, 12(8), 575; https://doi.org/10.3390/toxics12080575 - 7 Aug 2024
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Abstract
Biochar is crucial for agricultural output and plays a significant role in effectively eliminating heavy metals (HMs) from the soil, which is essential for maintaining a soil–plant environment. This work aimed to assess machine learning models to analyze the impact of soil parameters [...] Read more.
Biochar is crucial for agricultural output and plays a significant role in effectively eliminating heavy metals (HMs) from the soil, which is essential for maintaining a soil–plant environment. This work aimed to assess machine learning models to analyze the impact of soil parameters on the transformation of HMs in biochar–soil–plant environments, considering the intricate non-linear relationships involved. A total of 211 datasets from pot or field experiments were evaluated. Fourteen factors were taken into account to assess the efficiency and bioavailability of HM–biochar amendment immobilization. Four predictive models, namely linear regression (LR), partial least squares (PLS), support vector regression (SVR), and random forest (RF), were compared to predict the immobilization efficiency of biochar-HM. The findings revealed that the RF model was created using 5-fold cross-validation, which exhibited a more reliable prediction performance. The results indicated that soil features accounted for 79.7% of the absorption of HM by crops, followed by biochar properties at 17.1% and crop properties at 3.2%. The main elements that influenced the result have been determined as the characteristics of the soil (including the presence of different HM species and the amount of clay) and the quantity and attributes of the biochar (such as the temperature at which it was produced by pyrolysis). Furthermore, the RF model was further developed to predict bioaccumulation factors (BAF) and variations in crop uptake (CCU). The R2 values were found to be 0.7338 and 0.6997, respectively. Thus, machine learning (ML) models could be useful in understanding the behavior of HMs in soil–plant ecosystems by employing biochar additions. Full article
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