酸化污泥中重金属在电动力作用下的去除率研究  

Study on the Removal Efficiencies of Heavy Metals in Acidified Sewage Sludge Using Electroremediation Technique

作　　者：袁华山[1] 刘云国[1] 李欣[1] 叶菲[1] 陈朝猛[1] 张碧波[1] 

机构地区：[1]湖南大学环境科学与工程学院

出　　处：《环境卫生工程》2006年第2期5-8,共4页Environmental Sanitation Engineering

基　　金：湖南省自然科学基金项目(04JJ3013)

摘　　要：分析了长沙市某污水处理厂污泥中重金属分布。对污泥样品用HNO3进行酸化处理,酸化后pH值为3.2、1.9。分析了酸化处理后Cd、Zn、Cu在污泥中的形态分布。重点研究了酸化污泥中的Cd、Zn、Cu在电动力作用下的去除率。酸化污泥在电动力的作用下,经过5d后,Cd、Zn的去除率明显提高,Cu的去除率提高相对较少。针对我国污泥中Zn含量较高的特点,提出在污泥厌氧消化处理时,同时用电动力处理污泥中的重金属,可大大提高重金属的去除率。Heavy metal concentrations of the sewage sludge of a wastewater treatment plant in Changsha were analyzed. The sewage sludge samples were acidified with HNO3. After acidified, the pH values of the sewage sludges were 3.2 and 1, 9 respectively, and the speciations of Cd, Zn and Cu in the acidified sewage sludge were analyzed. This work focused on the removal efficiencies of Cd, Zn and Cu in the acidified sewage sludge by electrokineticremidiation, After five days electroremediation, ex- cept for Cu, the removal efficiencies of Cd, Zn in the acidified sewage sludge were enhanced obviously, According to high concentration of Zn in sewage sludge in our country. Electroremediation technique combining with anaerobic digestion treatment was put forward, and the removal efficiencies of heavy metals in sewage sludge can be enhanced greatly.

关 键 词：电动力修复 重金属 酸化污泥 

分 类 号：X703[环境科学与工程—环境工程]