Cr(Ⅵ)在Mg-Al型类水滑石上的脱附性能研究  

Desorption of chromium(Ⅵ) from Mg-Al hydrotalcite-like compounds

作　　者：臧运波[1] 侯万国[2] 

机构地区：[1]商丘师范学院化学系,商丘476000 [2]山东大学胶体与界面化学教育部重点实验室,济南250100

出　　处：《环境工程学报》2012年第1期218-221,共4页Chinese Journal of Environmental Engineering

基　　金：国家"973"重大基础研究计划项目(2004CB418504);国家自然科学基金资助项目(20573065);河南省教育厅自然科学研究计划项目(2010B150021)

摘　　要：研究了Cr(Ⅵ)在带结构正电荷的Mg-Al型类水滑石(HTlc)上的脱附性质,考察了多种脱附剂的脱附性能,研究了脱附剂种类、浓度、pH值和脱附时间等因素的影响。实验表明,脱附平衡时间比吸附平衡时间稍长,不同的脱附剂脱附效果不一样,对同一种脱附剂来说,随着脱附剂浓度的增大,脱附量增大;随着pH值的升高,脱附量总体呈上升趋势。Desorption of Cr（Ⅵ） from Mg-Al hydrotalcite-like compounds（HTlc） was studied with different desorption agents.The effects of electrolyte concentrations,pH,time and the varieties of desorption agents on the desorption performance were investigated.It was found that the time for desorption equilibrium was longer than that for sorption equilibrium.Different desorption agents had various desorption capacities.For one desorption agent,the desorption amount increased with the increase of concentrations.Furthermore,the increases of pH values can enhance the desorption amounts in general.

关 键 词：类水滑石 双层金属氢氧化物 铬(Ⅵ) 脱附 

分 类 号：X781.1[环境科学与工程—环境工程]