阴离子粘土吸附As(Ⅴ)的动力学研究  

Adsorption kinetics of As(Ⅴ) from aqueous solutions by anionic clay

作　　者：彭书传[1] 陈天虎[1] 崔康平[1] 杨远盛[1] 王诗生[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《地球化学》2006年第3期280-284,共5页Geochimica

基　　金：国家自然科学基金(40472026)

摘　　要：利用共沉淀水热法制备镁铝阴离子粘土材料,研究了其吸附水中As(Ⅴ)的动力学。结果表明,在初始浓度为20.42～60.88mg/L及温度为298～323K的范围内,阴离子粘土对水中As(Ⅴ)的吸附动力学数据均符合拟二级速率方程。吸附表观活化能为14.40kJ/mol,说明温度对此吸附的影响并不显著。Mg-Al anionic clay was prepared employing coprecipitation and hydrothermal method, and the adsorption kinetics of As （ V ） from aqueous solutions by anionic clay was investigated. The results show that kinetics data for the adsorption of As （ V ） from aqueous solutions were in good agreement with pseudo-second rate equation within the initial concentration of 20.42-60.88 mg/L and experimental temperature of 298-323 K. The apparent adsorption activation energy is as low as 14.40 kJ/mol, suggesting that the experimental temperature has no marked influence on the adsorption of As （ V ） onto anionic clay.

关 键 词：阴离子粘土 吸附 AS(V) 动力学 

分 类 号：P595[天文地球—地球化学] X142[天文地球—地质学]