中文摘要：

通过底泥交换态重金属和砷含量的分析以及毒性浸出测试,考察磷酸氢二铵和碳酸钙对底泥中重金属和砷的稳定化处理效果。结果表明,随着磷酸氢二铵添加量的增加底泥pH值逐步降低,随着碳酸钙添加量的增加底泥pH值逐步升高。磷酸氢二铵对底泥中Pb的稳定有良好效果,然而对Zn、As却产生了极大的活化作用。碳酸钙对底泥中Pb、Cd、Zn的稳定有良好效果,但对As的稳定没有明显作用。相对而言,碳酸钙更适合用来稳定化处理重金属和砷复合污染底泥。

英文摘要：

In order to assess the effects of two chemical immobilization materials like diammonium phosphate and calcium carbonate on stabilization of heavy metal and arsenic compound contaminated sediment,the toxicity leaching test and the exchange fractionation of heavy metal and arsenic were studied.The results showed that the pH value of the sediment decreased with the treatment of diammonium phosphate,while the pH value of the sediment increased after adding calcium carbonate.The diammonium phosphate had significant effects on the stabilization of Pb,while made Zn and As greatly activated in sediment.The stabilizations of Pb,Cd and Zn were significant by adding calcium carbonate,while there was no obvious effects on As.Conclusively,calcium carbonate was more suitable for the compound pollution of heavy metal and arsenic in polluted sediment.