重金属的一般存在形态和转化方式

Review about Speciation and Transformation of Heavy Metals in Soil

本文对重金属污染土壤的常用修复方法进行统计和对比,通过优缺点比较明确化学淋洗在实际土壤修复中的优越性。文章以Tessier五步提取法为分析方法讨论和总结了重金属常见的几种存在形态、在土壤中的转化特征、影响因素和具体研究案例。本文通过总结重金属在土壤中的存在形态和形态转化的一般规律,为实际工程中重金属淋洗奠定了良好的理论基础,为重金属淋洗工艺的选择和优化提供了思路。

This study had compared and made analysis among four commonly used soil remediation methods for heavy metal pollution. According to the superiorities and inferiorities of each method, it was concluded that chemical soil washing was the first one for development land restoration. Based on Tessier 5-step sequential extraction, it has analyzed the different speciations of heavy metals and their transformation. Furthermore, conclusion and explanations has been made for three kinds of transformation including physical, chemical and biological transformation. This review could provide new ideas for the selection and improvements of soil washing application.