固化剂对Cd污染土壤的固化效果研究  

Study on Stabilizing Effects of Curing Agents on Cd-Contaminated Soil

作　　者：王金恒[1] 张凤娥[1] 董良飞[1] 

机构地区：[1]常州大学环境与安全工程学院,江苏常州213164

出　　处：《常州大学学报（自然科学版）》2017年第1期46-49,共4页Journal of Changzhou University：Natural Science Edition

基　　金：龙城英才项目(2014150)

摘　　要：为研究Cd污染土壤固化/稳定化最优的药剂配比,以Cd污染土壤为研究对象,通过正交试验向土壤中添加波特兰水泥,磷酸二氢钙,硅藻土和高岭土4种固化剂,以固化/稳定后土壤中Cd的浸出质量浓度为评价指标,确定最优的药剂配比。实验结果表明:对Cd的固化能力较好的是波特兰水泥,可减少Cd的浸出量65.9%。对Cd最佳的药剂配比为:波特兰水泥与磷酸二氢钙的用量均为8.0‰,硅藻土的用量为6.0‰,高岭土的用量为4.0‰。To study the optimal ratio of agents in solidifying/stabilizing Cd-eontaminated soil, orthogonal experiments were conducted by adding curing agents, namely, Portland cement, monocalcium phosphate, diatomite, kaolin into Cd-eontaminated soil, to determine an optimal agent mixing ratio by evaluating the leaching concentration of Cd in the solidified/stabilized soil. The main results of the experiments were as follows： Portland cement showed the best effect on reducing the leaching concentration of Cd by 65.9%. The best ratio of Cd were as follows： the amount of Portland cement, monocalcium phosphate, diatomite and kaolin were 8.0‰, 8.0‰, 6.0‰, 4. 0‰, respectively.

关 键 词：固化剂 土壤 重金属 CD 

分 类 号：X53[环境科学与工程—环境工程]