ZnAl类水滑石吸附Cr(VI)性能研究  

Studies on adsorption of Cr ( VI ) from aqueous solutions onto Zn/Al -layered double hydroxides

作　　者：潘国祥[1] 倪哲明[1] 李丹[1] 方彩萍[1] 王力耕[1] 程晶波[1] 

机构地区：[1]浙江工业大学化学工程与材料学院,浙江杭州310032

出　　处：《浙江工业大学学报》2005年第3期334-336,共3页Journal of Zhejiang University of Technology

摘　　要：对影响ZnAl-LDO吸附Cr(VI)性能的各因素(溶液pH值、温度、搅拌和沉降时间、初始Cr(VI)浓度、Zn/Al比)进行探讨,并考察了材料再生后的吸附性能.研究结果表明,控制溶液pH值是提高ZnAl-LDO吸附Cr(VI)性能的关键点;在最佳吸附条件下,Zn2Al-LDO对Cr(VI)的饱和吸附量高达73.83mg/g;吸附材料可再生,循环使用3次,吸附性能无明显变化.<Abstrcat> The performances of ZnAl-LDO for adsorption and desorption of hexavalent chromium was investigated. The influence of stir and subside time, solution pH, initial chromium concentration and temperature, the ratio Zn/Al has been tested. The results indicated that strictly controlling solution pH in the reaction was the key of enhanceing adsorption. Under the best adsorption conditions, the adsorption capacity of Zn_2Al-LDO reached 73.83 mg/g. Materials can reuse through desorption in the sodium carbonate solution,and the adsorption efficient had not changed markedly after three cycles.

关 键 词：类水滑石 结构重组 六价铬 

分 类 号：O611.4[理学—无机化学] O643.36[理学—化学]