应用生态学报2011，Vol.22Issue(3)：816-824,9.
重金属污染土壤稳定/固化修复技术研究进展
Recent advance in solidification/stabilization technology for the remediation of heavy metals contaminated soil
摘要
Abstract
Remediation of heavy metals-contaminated soil is still a difficulty and a hotspot of international research projects. At present. the technologies commonly adopted for the remediation of contaminated sites mainly include excavation. solidification/stabilization ( S/S) . soil washing, soil vapor extraction ( SVE) . thermal treatment. and bioremediation. Based on the S/S technical guidelines of Unite State Environmental Protection Agency ( EPA) and United Kingdom Environment Agency ( EA) and the domestic and foreign patents, this paper introduced the concepts of S/S and its development status at home and abroad, and discussed its future development directions. Solidification refers to a process that binds contaminated media with a reagent, changing the media' s physical properties via increasing its compressive strength, decreasing its permeability, and encapsulating the contaminants to form a solid material. Stabilization refers to the process that involves a chemical reaction which reduces the leachability of a waste. chemically immobilizes the waste and reduces its solubility, making the waste become less harmful or less mobile. S/S technology includes cement solidification, lime pozzolanic solidification, plastic materials stabilization. vitrification. and regent-based stabilization. Stabilization ( or immobilization) treatment processes convert contaminants to less mobile forms through chemical or thermal interactions. In stabilization technology, the aim of adding agents is to change the soil physical and chemical properties through pH control technology, redox potential technology, precipitation techniques, adsorption technology, and ion-exchange technology that change the existing forms of heavy metals in soil. and thus. reduce the heavy metals bioavailability and mobility. This review also discussed the S/S evaluation methods. highlighted the need to enhance S/S technology in the molecular bonding, soil polymers. and formulation of China ' s S/S technical guidelines.关键词
土壤/重金属/污染/固定化/稳定化分类
资源环境引用本文复制引用
郝汉舟,陈同斌,靳孟贵,雷梅,刘成武,祖文普,黄莉敏..重金属污染土壤稳定/固化修复技术研究进展[J].应用生态学报,2011,22(3):816-824,9.基金项目
国家自然科学基金项目(40772155)、中国科学院知识创新工程重大项目(kzcxl-yw-06-03)、湖北省自然科学基金项目(2009CDZ028)和湖北省教育厅科研项目(Q20102803)资助. （40772155）
