The remediation of soil contaminated with heavy metals is an ongoing environmental concern. Paddy soils contaminated with Cd and Zn were collected from around abandoned metals mines in Korea. Limestone and steel slag were mixed with the collected soil, as amendments for Cd and Zn immobilization. Sequential extraction, lettuce cultivation and five single extraction methods were carried out to assess the effects on Cd and Zn immobilization using amendments. The exchangeable fraction of Cd and Zn was decreased and Fe–Mn oxides fraction increased by stabilization using amendments. In addition, the accumulation of Cd and Zn in lettuce decreased in treated soil and indicated the Cd and Zn immobilization effect in soil by the amendments. The extractable Cd and Zn by CaCl₂ and Mehlich-3 in the untreated soils were higher than that of treated soils, whereas Cd and Zn extraction by ethylenediaminetetraacetic acid (EDTA), diethylene tetramine penta-acetic acid (DTPA) and toxicity characteristic leaching procedure (TCLP) has a small or no difference between the untreated and treated soils. The extraction results by CaCl₂ and Mehlich-3 methods present reasonable results for Cd and Zn immobilization in soil than EDTA, DTPA and TCLP methods. Therefore, the choice of appropriate extraction method is very important when there is the assessment of Cd and Zn immobilization efficiency.

对被重金属污染的土壤的修复一直是环境问题。从韩国附近的废弃金属矿山中收集了被镉和锌污染的稻田土壤。将石灰石和钢渣与收集的土壤混合，以固定Cd和Zn。进行了顺序提取，生菜栽培和五种单一提取方法，以评估使用修正对Cd和Zn固定化的影响。通过使用修正剂进行稳定化处理，可减少Cd和Zn的交换分数，并增加Fe-Mn氧化物的分数。此外，处理后的土壤中生菜中Cd和Zn的积累减少了，表明该改良剂对土壤中Cd和Zn的固定作用。CaCl ₂萃取镉和锌未经处理的土壤中的Mehlich-3和Mehlich-3高于处理过的土壤，而乙二胺四乙酸（EDTA），二亚乙基四胺五乙酸（DTPA）和毒性特征浸出程序（TCLP）萃取镉和锌的作用很小或没有未经处理的土壤与未经处理的土壤之间的差异。与EDTA，DTPA和TCLP方法相比，CaCl ₂和Mehlich-3方法的提取结果为土壤中Cd和Zn的固定化提供了合理的结果。因此，在评估Cd和Zn固定效率时，选择合适的提取方法非常重要。