土壤重金属污染原位钝化修复及效果评价进展研究

近年来土壤重金属污染越来越严重,各种土壤重金属污染修复技术中,原位钝化修复技术由于成本低、操作简单易行、并且修复效率高,对于中轻度浓度污染土壤的修复具有较好的应用前景,已经成为研究的热点.本文对原位钝化修复的机理机制进行讨论,指出影响钝化修复的因素包括土壤水分、土壤酸碱度、土壤有机质含量和生长的植物类型.结合了最近的研究发现将钝化剂分为无机钝化剂、有机钝化剂、微生物钝化剂和新型钝化剂和生物炭.阐述了修复后的评价方法,就钝化剂技术的局限性和应用前景给出了方向.

Advances in Research on in Situ immobilization of Heavy Metal in Contaminated Soil and Its Effect Evaluation

Heavy metal contaminated in the soil is increasingly serious in recent years. All kinds of soil heavy metal pollution remediation techniques, in situ remediation technology, because of its low cost, simple operation and easy, and high repair effi-ciency and better application prospect for repair of mild concentration contaminated soil, has become a research hotspot. The mechanism of in situ remediation were discussed, pointed out that the factors affecting repair of passivation included soil moisture, soil pH, soil organic matter content and growth of plant type. Combined with the recent research findings, passivates were divided into inorganic passivation agent, organic passivation, inactivate microorganisms agent and new passivation agent and biological carbon. The method of evaluation repaired after were expounded, the limitations of passivation technology and application pros-pects were put forward.