粉煤灰及膨润土对Ni^(2+),Zn^(2+),Pb^(2+),Cd^(2+)的吸附  

Removal of Ni^(2+),Zn^(2+),Pb^(2+),Cd^(2+) by Adsorption on Fly Ash and Bentonite

作　　者：席永慧[1] 赵红[2] 刘建航[3] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]同济大学混凝土材料研究国家重点实验室,上海200092 [3]上海市市政工程管理局,上海200092

出　　处：《建筑材料学报》2003年第3期291-295,共5页Journal of Building Materials

基　　金：上海市科技发展基金资助项目(022312202)

摘　　要：研究了粉煤灰从溶液中去除有毒金属离子Ni2+,Zn2+,Pb2+,Cd2+的能力,并与膨润土进行了对比.介绍了一种有效的求平衡吸附率的计算方法.试验结果表明:粉煤灰除了对Zn2+的吸附能力和膨润土相当外,其余均大于膨润土.粉煤灰对Pb2+(初始浓度为2000mg/L)的平衡吸附率达83%;对Ni2+,Zn2+,Cd2+(初始浓度均为800mg/L)的平衡吸附率分别为61%,60%,94%.Removal of Ni2+,Zn2+,Pb2+,Cd2+ from aqueous solution by adsorption process on fly ash was investigated. The results of fly ash were compared with those of bentonite. An effective method of calculating equilibrium uptake was introduced. The results show that the uptakes of Ni2+,Zn2+,Pb2+,Cd2+ by adsorption on fly ash were equal to or larger than those on bentonite. The equilibrium uptake of Pb2+ which had the initial concentration of 2 000 mg/L by adsorption on fly ash was 83%. The equilibrium percentage uptake of Ni2+,Zn2+,Cd2+ which had the initial concentration of 800 mg/L were 61%, 60% and 94% respectively.

关 键 词：粉煤灰 膨润土 吸附 吸附率 平衡吸附率 

分 类 号：X773[环境科学与工程—环境工程]