Heavy metals discharged into the environment by natural and human activities may have harmful consequences on human health,ecological environment,economy and society,so the remediation of the soil con-taminated with heavy metal has attracted much attention in recent years.Among several techniques for remedia-tion of heavy metal-contaminated soil(physical remediation,chemical remediation and biological remediation),the metal stabilization technology using soil improvers has received considerable attention and is a promising method for soil remediation.In this paper,the research progress of soil improvers in remediation of heavy metal-contaminated soil in recent years was reviewed,including inorganic materials such as clay minerals,phosphorus-containing materials,metals and metal oxides,organic materials such as organic matter,municipal solid waste and biochar,and some combined application of organic and inorganic materials in remediation of heavy metal-con-taminated soil.These improvers effectively reduce the bioavailability of heavy metals in soil through various re-pair processes such as adsorption,complexation,precipitation and REDOX.Finally,the prospect of future re-search is put forward,and the basic theoretical research should be strengthened to clarify the chemical stabiliza-tion process and heavy metal repair mechanism,so as to broaden the development of this field.It provides a valu-able reference for the study and practice of the stability of heavy metals in polluted soil.
关键词
重金属污染修复/土壤改进剂/稳定材料/无机材料/有机材料
Key words
heavy metal pollution/soil remediation/stabilization materials/inorganic materials/organic ma-terials
维普
万方数据