铝镁铁三元类水滑石对Cr(VI)的吸附性能研究  

A Study of Adsorption Performance of Al/Mg/Fe Ternary Hydrotalcite-Like Compounds on Cr(VI)

作　　者：宋勇[1] 刘力[1] 王荣中[1] 颜福雄[1] 

机构地区：[1]长沙学院生物工程与环境科学系,湖南长沙410003

出　　处：《电镀与环保》2013年第4期43-45,共3页Electroplating & Pollution Control

基　　金：湖南省教育厅资助项目(10C0419);长沙市科技计划项目(K110719-11)

摘　　要：采用共沉淀法合成了铝镁铁三元类水滑石,考察了该类水滑石对水溶液中Cr(VI)的吸附性能。结果表明:在温度为20℃,初始pH值为7的条件下,吸附剂对Cr(VI)的吸附平衡时间约为15min,平衡时吸附量为8.37mg/g;吸附量随初始pH值的降低而增大,当初始pH值为2.8时吸附量达到9.55mg/g;吸附量还随着初始质量浓度的增加而增大,但当初始质量浓度超过20mg/L后吸附量反而下降。The AI/Mg/Fe ternary hydrotalcite-like compounds were synthesized by coprecipitation, and the adsorption performance of such hydrotalcite-like compounds on Cr（VI） was investigated. The results suggest that when the temperature is 20 ℃ and the initial pH value is 7, the equilibrium time of the adsorbent on Cr（VI） is 15 rain, and the equilibrium adsorption volume is 8.37 mg/g; the adsorption volume increases with the decrease of the initial pH value, the adsorption volume reaches 9.55 mg/g when initial pH value is 2. 83 the adsorption volume increases also with the increase of the initial mass concentration, but the adsorption will decline when the initial mass concentration exceeds 20 mg/L.

关 键 词：类水滑石 吸附 CR(VI) 

分 类 号：X703[环境科学与工程—环境工程]