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Solidification/stabilization of soil heavy metals by alkaline industrial wastes: A critical review
Environmental Pollution ( IF 7.6 ) Pub Date : 2022-09-03 , DOI: 10.1016/j.envpol.2022.120094
Qi Jiang 1 , Yongmei He 1 , Yonglin Wu 1 , Bo Dian 1 , Jilai Zhang 1 , Tianguo Li 1 , Ming Jiang 1
Affiliation  

Solidification/stabilization technology is one of the most desirable technologies for the remediation of heavy metal contaminated soils due to its convenience and effectiveness. The annual production of alkaline industrial wastes in China is in the hundreds of millions of tons. Alkaline industrial wastes have the potential to replace conventional stabilizers because of their cost effectiveness and performance in stabilizing heavy metals in soils. This paper systematically summarizes the use of four alkaline industrial wastes (soda residue, steel slag, carbide slag, and red mud) for the solidification/stabilization of heavy metal contaminated soils and provides a comprehensive analysis of the three mechanisms of action (hydration, precipitation, and adsorption) and factors that influence the process. In addition, the environmental risks associated with the use of alkaline industrial wastes are highlighted. We found that soda residues, steel slag and carbide slag are appropriate for solidification/stabilization of Pb, Cd, Zn and Cu, while red mud is a potential passivation agent for the stabilization of As in soils. However, implementation of remediation methods using alkaline industrial wastes has been limited because the long-term effectiveness, synergistic effects, and usage in soils containing multiple heavy metals have not been thoroughly studied. This review provides the latest knowledge on the mechanisms, risks, and challenges of using alkaline industrial wastes for solidification/stabilization of heavy metal contaminated soils.



中文翻译:

碱性工业废物对土壤重金属的固化/稳定化:批判性综述

固化/稳定化技术因其便利性和有效性而成为重金属污染土壤修复最理想的技术之一。我国每年产生的碱性工业废物达数亿吨。碱性工业废物具有取代传统稳定剂的潜力,因为它们具有成本效益和稳定土壤中重金属的性能。本文系统总结了四种碱性工业废物(碱渣、钢渣、电石渣和赤泥)用于重金属污染土壤的固化/稳定化,并对三种作用机制(水化、沉淀)进行了综合分析。和吸附)和影响过程的因素。此外,强调了与使用碱性工业废物有关的环境风险。我们发现苏打渣、钢渣和电石渣适用于 Pb、Cd、Zn 和 Cu 的凝固/稳定化,而赤泥是稳定土壤中 As 的潜在钝化剂。然而,使用碱性工业废物的修复方法的实施受到限制,因为尚未彻底研究含有多种重金属的土壤的长期有效性、协同效应和使用。本综述提供了有关使用碱性工业废物固化/稳定重金属污染土壤的机制、风险和挑战的最新知识。钢渣和电石渣适用于 Pb、Cd、Zn 和 Cu 的凝固/稳定化,而赤泥是稳定土壤中 As 的潜在钝化剂。然而,使用碱性工业废物的修复方法的实施受到限制,因为尚未彻底研究含有多种重金属的土壤的长期有效性、协同效应和使用。本综述提供了有关使用碱性工业废物固化/稳定重金属污染土壤的机制、风险和挑战的最新知识。钢渣和电石渣适用于 Pb、Cd、Zn 和 Cu 的凝固/稳定化,而赤泥是稳定土壤中 As 的潜在钝化剂。然而,使用碱性工业废物的修复方法的实施受到限制,因为尚未彻底研究含有多种重金属的土壤的长期有效性、协同效应和使用。本综述提供了有关使用碱性工业废物固化/稳定重金属污染土壤的机制、风险和挑战的最新知识。使用碱性工业废物的修复方法的实施受到限制,因为尚未彻底研究含有多种重金属的土壤的长期有效性、协同效应和使用。本综述提供了有关使用碱性工业废物固化/稳定重金属污染土壤的机制、风险和挑战的最新知识。使用碱性工业废物的修复方法的实施受到限制,因为尚未彻底研究含有多种重金属的土壤的长期有效性、协同效应和使用。本综述提供了有关使用碱性工业废物固化/稳定重金属污染土壤的机制、风险和挑战的最新知识。

更新日期:2022-09-07
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