湖南大学学报（自然科学版）2011，Vol.38Issue(6)：64-68,5.
蒙脱石对喹诺酮类抗生素的吸附平衡及动力学特征
Adsorption Equilibrium and Kinetics of Quinolone Antibiotics on Montmorillonite
摘要
Abstract
A static adsorption experiment was carried out to investigate the influence of initial concentration, pH, and cationic strength on adsorption of two kinds of quinolone antibiotics (ciprofloxacin and norfloxacin) on montmorillonite. The results showed that the adsorption process of ciprofloxacin and nor-floxacin were consistent with pseudo-second-order kinetics, and the adsorption rate constants were 0. 063 and 0.024 kg · mg-1 · h-1 respectively. Adsorption isotherms were well described by Freundlich equation, and the high lgKf showed strong adsorption ability. When the solution pH was less than the pKa2 of ciprofloxacin and norfloxacin, the adsorption capacity was higher. The adsorption capacity decreased sharply when the solution pH was above the pKa2. Both cationic and zwitterionic forms of ciprofloxacin and norfloxacin could be adsorbed significantly. At higher pH, the complexation of anion on the montmorillonite surface might become the main mechanism. The concentration of Ca2+ had a great influence on adsorption.The higher the concentration, the lower the adsorption capacity of ciprofloxacin and norfloxacin.关键词
抗生素/喹诺酮类/水污染/蒙脱石/吸附/去除/动力学Key words
antibiotics/ quinolones/ water pollution/ montmorillonite/ adsorption/ removal/ kinetics分类
资源环境引用本文复制引用
莫测辉,黄显东,吴小莲,李彦文,邹星,高鹏..蒙脱石对喹诺酮类抗生素的吸附平衡及动力学特征[J].湖南大学学报（自然科学版）,2011,38(6):64-68,5.基金项目
国家自然科学基金资助项目(30671208,40773062) （30671208,40773062）
中央高校基本科研业务费专项资金资助项目(21610410,21609709) （21610410,21609709）
广东省自然科学基金重点资助项目(07117909) （07117909）
广东省科技计划资助项目(2005B20801002,2006B20601003,2010B020311006) （2005B20801002,2006B20601003,2010B020311006）
广东省高校高层次人才项目 （）
广州市科技计划资助项目(10A82070466) （10A82070466）
东莞市科技计划资助项目(2007108101110) （2007108101110）
惠州市科技研究计划资助项目(2009B010001009) （2009B010001009）
