γ-Al_2O_3固载水滑石的原位制备及其对Cr(Ⅵ)的吸附性能研究  

In Situ Preparation of γ-Al_2O_3 Supported Hydrotalcite and Treatment of Wastewater Containing Chromium(Ⅵ)

作　　者：李顺凯[1] 申延明[1] 刘东斌[1] 樊丽辉[1] 李士凤[1] 

机构地区：[1]沈阳化工大学化学工程学院,辽宁沈阳110142

出　　处：《沈阳化工大学学报》2016年第3期207-211,共5页Journal of Shenyang University of Chemical Technology

基　　金：辽宁省教育厅重点实验室项目(LS2010121);沈阳市科学计划项目(F10-205-1-61)

摘　　要：以γ-Al_2O_3为载体,水热法原位合成γ-Al_2O_3固载镁铝水滑石,并在400℃对制备的水滑石(LDH)进行焙烧,制得γ-Al_2O_3固载的Mg Al复合金属氧化物(LDO),利用水滑石的记忆效应进行吸附脱除Cr(Ⅵ)的实验研究.结果表明:原位水热反应制得的γ-Al_2O_3固载水滑石样品表面被片状水滑石覆盖;γ-Al_2O_3固载的Mg Al复合金属氧化物对Cr(Ⅵ)的吸附量远大于未焙烧的水滑石;且水滑石焙烧温度为400℃、Cr(Ⅵ)溶液p H为5时,Cr(Ⅵ)脱除性能最好;γ-Al_2O_3固载的Mg Al复合金属氧化物质量一定,Cr(Ⅵ)溶液初始浓度变大时,Cr(Ⅵ)的脱除率将降低.The investigation of utilizing the memory effect of the hydrotalcite to adsorpt and remove chromium（ Ⅵ） was carried out in this article. The hydrotalcite with γ-Al2O3 as carrier was synthesised by in situ-hydrothermal method,which was calcined 400 ℃ to prepare γ-Al2O3 supported magnesium and aluminum mixed metal oxide（ LDO）. The results show that the adsorption capacity of the γ-Al2O3 supported magnesium and aluminum mixed metal oxide is significantly better than unsupported one. The capacity of adsorption and removal of chromium（ Ⅵ） is best when the calcination temperature is 400 ℃ and the PH of chromium（ Ⅵ） solution is 5. The removal rate of chromium（ Ⅵ） will reduce when the concentration of the initial Cr（ Ⅵ） solution increases.

关 键 词：Cr(Ⅵ) 水滑石 原位制备 吸附 

分 类 号：O647.33[理学—物理化学]