Journal article
Nickel in soil and water: Sources, biogeochemistry, and remediation using biochar
Journal of Hazardous Materials, Vol.419, pp.1-16
05/10/2021
PMID: 34171670
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Source: InCites
Abstract
Nickel (Ni) is a potentially toxic element that contaminates soil and water, threatens food and water security, and hinders sustainable development globally. Biochar has emerged as a promising novel material for remediating Ni-contaminated environments. However, the potential for pristine and functionalized biochars to immobilize/adsorb Ni in soil and water, and the mechanisms involved have not been systematically reviewed. Here, we critically review the different dimensions of Ni contamination and remediation in soil and water, including its occurrence and biogeochemical behavior under different environmental conditions and ecotoxicological hazards, and its remediation using biochar. Biochar is effective in immobilizing Ni in soil and water via ion exchange, electrostatic attraction, surface complexation, (co)precipitation, physical adsorption, and reduction due to the biogeochemistry of Ni and the interaction of Ni with surface functional groups and organic/inorganic compounds contained in biochar. The efficiency for Ni removal is consistently greater with functionalized than pristine biochars. Physical (e.g., ball milling) and chemical (e.g., alkali/acidic treatment) activation achieve higher surface area, porosity, and active surface groups on biochar that enhance Ni immobilization. This review highlights possible risks and challenges of biochar application in Ni remediation, suggests future research directions, and discusses implications for environmental agencies and decision-makers.
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•Ni occurrence and biogeochemistry, and remediation using biochar are reviewed.•Biochar affects redox-mediated transformations and reduces Ni availability.•Negative-charged acidic functional groups act as electron donors, enhance Ni removal.•Competitive adsorption on binding sites on biochar may impair Ni remediation.•Biochars should be fabricated and designed for Ni remediation.
Details
- Title
- Nickel in soil and water: Sources, biogeochemistry, and remediation using biochar
- Creators
- Ali El-Naggar - Zhejiang A & F UniversityNaveed Ahmed - Mehran University of Engineering and TechnologyAhmed Mosa - Mansoura UniversityNabeel Khan Niazi - University of Agriculture FaisalabadBalal Yousaf - Middle East Technical UniversityAnket Sharma - Zhejiang A & F UniversityBinoy Sarkar - Lancaster UniversityYanjiang Cai - Zhejiang A & F UniversityScott X Chang - Zhejiang A & F University
- Publication Details
- Journal of Hazardous Materials, Vol.419, pp.1-16
- Publisher
- Elsevier B.V
- Grant note
- This study was supported by the National Natural Science Foundation of China (42050410315, 41877085, 41877088), the Research and Development Fund of Zhejiang A&F University (2018FR005, 2018FR006), the Open Research Fund Program of the State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University (ZY20180301, ZY20180205), and the Zhejiang Postdoctoral Research Program (20120200001).
- Identifiers
- 991012951196502368
- Copyright
- © 2021 Elsevier B.V. All rights reserved.
- Academic Unit
- School of Environment, Science and Engineering; Science; Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article