Kinetics and Thermodynamics of Adsorption of Hezavalent Chromium from Aqueous Solution Using Microspheres Prepared by Rectorite and Humic Acid.

摘要：

Rectorite (REC) and humic acid (HA) were used to prepare microsphere-shape adsorbent. The kinetics and thermodynamics of adsorption of hexavalent Chromium ions onto the microspheres were investigated. The results show that the adsorption equilibrium can be carried out during 150 min under optimum conditions. The adsorption kinetics conforms to pseudo-first-order equation. The adsorption process is jointly controlled by outer and inner diffusion. The isothermal adsorption law can be well described by Freundlich, Langmruir and Temkin models. The adsorption process is spontaneous, endothermic and out-of-order. The whole adsorption process is mainly controlled by entropies. The adsorption can be classified as chemical adsorption.

关键词： rectorite humic acid microsphere Chromium adsorption kinetics thermodynamics

作者: TANG Yubin YU Fang CHEN Fangyan

作者单位: School of Biotechnology & Environmental Engineering School of Materials Science & Engineering,Jiangsu University of Science & Technology,Zhenjiang 21201

会议类型: 国际会议

会议名称: 2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)

会议地点: 上海

会议语种:英文

页码: 1337-1342

在线出版日期: 2009-06-02（万方平台首次上网日期，不代表论文的发表时间）