四川大学学报：工程科学版2012，Vol.44Issue(1)：159-165,7.
焙烧态MgAl-CO_3双羟基层状金属化合物去除水中痕量高氯酸盐
Treatment of Trace Perchlorate from Water by Calcined MgAl-CO_3 Layered Double Hydroxides
摘要
Abstract
MgAl-CO3 hydrotalcites with different Mg/Al mole ratios were prepared by co-precipitation method,and calcined to get the calcined samples.The adsorption capacity of trace perchlorate ion from water on calcined samples was measured,the influence of initial perchlorate concentration,varying pH of solution,temperature,particle size,and co-existed anions concentration on the adsorption capacity of calcined samples were studied,kinetic parameters were obtained.Results showed that the best synthesis conditions to maximize the perchlorate adsorption capacity of the calcined MgAl-CO3 layered double hydroxides are the calcination temperature of 550 ℃ and n（Mg2＋）/n（Al3＋）,which fit well with second-order kinetic equation and Freundlich isotherm model.It could be used as a buffer.in a wide range of pH But in strong acid conditions,the calcined hydrotalcite may be dissolved,while in strong alkali condition,the perchlorate removal was lower as a consequence of the competition between OH-and ClO4-.关键词
MgAl-CO3双羟基层状金属化合物/焙烧态水滑石/高氯酸盐/吸附Key words
MgAl-CO3 layered double hydroxides/calcined hydrotalcites/perchlorate/adsorption分类
资源环境引用本文复制引用
杨一琼,高乃云,郭洪光,马艳..焙烧态MgAl-CO_3双羟基层状金属化合物去除水中痕量高氯酸盐[J].四川大学学报：工程科学版,2012,44(1):159-165,7.基金项目
国家自然科学基金资助项目 （）
国家科技重大专项资助项目 （）
