Pb^(2+)的磷酸盐高效稳定化方法及模拟  

Phosphate immobilization of Pb^(2+)

作　　者：杜雪娟[1] 蒋建国[1] 王军[1] 张妍[2] 许鑫[1] 

机构地区：[1]清华大学环境科学与工程系,北京100084 [2]北京师范大学环境学院,北京100075

出　　处：《清华大学学报（自然科学版）》2007年第12期2149-2152,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高技术项目(2002AA644010);国家"十五"科技攻关项目(2003BA604A-11-07)

摘　　要：为减少铅污染废物对环境和人体健康的影响,研究经济快速高效且对pH适应能力强的Pb2+稳定化方法。考察了3种磷酸盐CaHPO4、Ca(H2PO4)2、Na3PO4对水溶液中Pb2+的稳定化效果,比较了反应时间和初始Pb2+浓度变化对稳定化效果的影响,并采用Visual Minteq软件对反应进行模拟。结果表明:这3种磷酸盐均可通过生成沉淀的方式迅速完成Pb2+的稳定化,溶液中Pb2+去除率分别达96.9%、97.5%和100%。3种磷酸盐对Pb2+稳定化效率随着初始Pb2+浓度增加而升高,且Na3PO4处理效果最优。溶液pH升高有利于Pb2+的磷酸盐稳定化。The immobilization of aqueous Pb^2＋ by three phosphates, CaHPO4, Ca（H2PO4）2 and Na3PO4, was studied to reduce the impact of lead contamination on the environment and public health. The objective was to find a highly economical Pb^2＋ immobilization method that was effective over a wide pH range. The studies evaluated the effects of reaction time and initial Pb^2＋ concentration. The Visual Minteq code was used to model the reactions. The results show that the immobilization of Pb^2＋ by CaHPO4, Ca（H2PO4）2, and Na3PO4 were all completed rapidly by precipitation, with removal rates of 96.9%, 97.5,%, and 100% of the total Pb^2＋. The immobilization efficiency increases with increasing initial Pb^2＋ concentration and increasing pH. Na3PO4 was the most effective phosphate.

关 键 词：固体废物处理 PB^2+ 磷酸盐 稳定化 

分 类 号：X705[环境科学与工程—环境工程]