基于Tessier法的土壤中不同形态镉的转化及其影响因素研究进展

土壤重金属形态分析对土壤污染修复具有重要意义。综述了几种常见的重金属形态分析方法并基于Tessier五步连续浸提法分析土壤中Cd形态转化规律，进一步总结了土壤的理化性质对Cd形态的影响。不同类型土壤中Cd形态的含量分配比不同，土壤中的可交换态Cd含量较高，迁移性较强，对生物危害较大，因此可通过改变土壤pH值、土壤有机质和土壤氧化还原条件等土壤理化性质使可交换态Cd向残渣态Cd转化，进而降低土壤中Cd对生物的毒性作用。旨在深化读者对土壤Cd污染的认识，并为土壤Cd污染治理与修复提供参考。

Research Progress of Cd Form Transformation and the Effective Environmental Factors in Soil Based on Tessier Analysis

Soil heavy metal speciation analysis is of great significance for soil pollution remediation. This study summarized the common methods for heavy metal analysis and investigated the transformation between the heavy metal Cd classified by Tessier five step continuous extraction method. Furthermore, the effects of soil physical and chemical properties on Cd forms were further summarized. The results showed that the exchangeable Cd was presented a large proportion, a high ability of migration and more harmful to organisms. Therefore, exchangeable Cd can be transformed into residual Cd by changing soil physical and chemical properties such as soil pH value, colloid content and soil redox conditions, so as to reduce the toxic impact of Cd on organisms. The purpose of this paper is to deepen readers’ understanding of soil Cd pollution, and to provide reference for the treatment and remediation of soil Cd pollution.