期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 419, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.126421
关键词
Charcoal; Immobilization; Soil contamination; Sorption; Toxic trace element; Wastewater
资金
- National Natural Science Foundation of China [42050410315, 41877085, 41877088]
- Research and Development Fund of Zhejiang AF University [2018FR005, 2018FR006]
- Open Research Fund Program of the State Key Laboratory of Subtropical Silviculture, Zhejiang AF University [ZY20180301, ZY20180205]
- Zhejiang Postdoctoral Research Program [20120200001]
Biochar is an effective material for remediating Ni-contaminated environments, with the potential to immobilize Ni in soil and water through various mechanisms, such as ion exchange, electrostatic attraction, and surface complexation. Physical and chemical activation of biochar can enhance its efficiency for Ni removal.
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据