铝镁铁三元类水滑石对Cr(Ⅵ)的吸附分析  

Analysis on Adsorption Mechanism of Cr(Ⅵ) from Aqueous Solutions onto Al/Fe/Mg-Hydrotalcite-Like Compounds

作　　者：宋勇[1] 颜福雄[1] 欧阳雄武[1] 王荣中[1] 余取民[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：《湘潭大学自然科学学报》2013年第1期84-87,共4页Natural Science Journal of Xiangtan University

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,对水滑石对水溶液中Cr(Ⅵ)的吸附进行了分析.结果表明,温度对该类水滑石吸附Cr(Ⅵ)的影响不大;该类水滑石对Cr(Ⅵ)的吸附更遵循Freundlich等温线;吸附动力学符合拟二级动力学模型,相关性达0.999;热力学分析说明该吸附过程是吸热反应.Al/Mg/Fe/-hydrotalcite-like compounds were synthesized by coprecipitation. This hydrotal- cite-like compounds were used to adsorb Cr（Ⅵ）. The results suggested that the experimental data fitted well to Freundlich models. Pseudo-second-order model was found to explain the kinetics of Cr（Ⅵ） adsorp- tion most effectively, the correlation is 0. 999. Thermodynamic analysis showed the adsorption process is endothermie reaction.

关 键 词：水滑石 吸附 Cr(Ⅵ) 

分 类 号：X703[环境科学与工程—环境工程]