砷污染土壤的固化/稳定化修复研究进展

Research Progress on Solidification/Stabilization Remediation of Arsenic Contaminated Soil

砷具有很强的毒性,环境污染风险高,传播途径广泛。当前,砷污染土壤修复广泛应用固化/稳定化技术。常用的固化/稳定化剂有3种,即零价铁、铁(氢)氧化物和铁盐,砷污染土壤的固化/稳定化修复机制有吸附、沉淀/共沉淀和氧化/还原。固化/稳定化技术是我国污染地块环境风险管控的有效措施,砷污染土壤修复后,要开展修复效果评估。未来,要结合实际修复工程应用存在的问题,明确研究重点,最终使其更好地服务砷污染土壤修复。

Arsenic has strong toxicity,high risk of environmental pollution,and a wide range of transmission pathways.Currently,solidification/stabilization technology is widely used in the remediation of arsenic contaminated soil.There are three commonly used solidification/stabilization agents,namely zero valent iron,iron(hydrogen)oxides and iron salts,and the solidification/stabilization remediation mechanisms of arsenic contaminated soil include adsorption,precipitation/co precipitation,and oxidation/reduction.Solidification/stabilization technology is an effective measure for environmental risk control of polluted land in China,after the remediation of arsenic contaminated soil,an assessment of the remediation effect should be carried out.In the future,it is necessary to combine the problems existing in practical remediation engineering applications,clarify the research focus,and ultimately better serve the remediation of arsenic contaminated soil.