重金属污染农田土壤化学钝化修复的稳定性研究进展

Remediation Stability of in Situ Chemical Immobilization of Heavy Metals Contaminated Soil: A Review

化学钝化修复是一种应用广泛的重金属污染农田土壤修复方法,但钝化修复只是暂时降低了土壤中重金属的移动性和生物有效性,随着时间的推移被固定的重金属有可能重新释放到土壤中,因此钝化修复重金属污染土壤的稳定性是重金属污染土壤原位钝化修复成功的关键。本文探讨了钝化修复剂的种类、修复机制、修复稳定性的影响因素以及修复稳定性的研究方法,深入分析了钝化修复稳定性的研究现状和存在问题,并提出今后应加强钝化修复稳定性机制和修复稳定性预测模型的研究,建立和完善科学的钝化修复稳定性的研究方法。

In suit chemical immobilization has been considered as a low-cost and widely used technology in the remediation of heavy metal contaminated farmland soil, but this technology only temporarily reduces the mobility and bioavailability of heavy metals. Along with time, the immobilized heavy metals may be released back into the soil. Thus, the remediation stability is the key to the success of chemical immobilization of heavy metals contaminated soil. This paper summarized the present researches about the kinds of immobilization amendments, immobilization mechanisms, the influence factors and research methods of immobilization stability, deeply analyzed the research situation and existing problems of immobilization stability. The prospects and limitations of chemical immobilization remediation were also discussed. Future work should focus on the study of immobilization mechanisms, the prediction model of immobilization stability and the improvement of scientific approach of in suit chemical immobilization stability.