中文摘要：

在实验室内,以矿区Cu污染的红壤R1,人工污染的红壤R2和黄棕壤R3为供试土壤,选用己二胺二硫代氨基甲酸盐（DTC）改性的膨润土为修复材料,以欧共体标准物资局（European Communities Bureau of Reference）改进的三步连续提取法（BCR）分析污染土壤中Cu的形态,并研究矿物材料用量、土壤类型、p H和土壤含水量等因素对土壤中Cu形态转化的影响.研究结果表明：改性膨润土对Cu污染的土壤具有一定的修复效果,可使酸溶态和还原态含量大大降低,氧化态和残渣态含量大大升高;且其修复效果随矿物用量、p H值的增加而升高,随电解质浓度的增加而降低,淹水时不利于土壤修复.

英文摘要：

In the laboratory,three kinds of soil samples,the copper contaminated soil（ R1） collected from mining areas of Daye city,Hubei Province,artificially-polluted red soil（ R2）,and yellow brown soil（ R3） with exogenous copper,were selected to be remediated by modified bentonite with diethyidithiocarbamate（ DTC）. Four kinds of copper forms were analyzed with the modified BCR sequential extraction procedures. Additionally,impacts of the mineral material dosage,soil type,p H,soil moisture and other factors on Cu transformation in soil were systematically investigated. Results from this study show that the modified benotinite has the ability to repair the soils contaminated by copper,with the content of soluble and reduced copper states markedly reduced,and that of the oxidation and residual states significantly increased. The reparation effect on the soil samples contaminated by copper was enhanced with an increased bentonite dosage and p H values. Conversely,the reparation effect was reduced with an increased electrolyte concentration. However,we found that the flooding condition was disadvantageous to soil remediation.