Effect of pH and Ionic Strength on the Adsorption of Antimony(Ⅲ) on Kaolinite

摘要：

The present work investigated the adsorption and mobility (desorption) of Sb(Ⅲ) on kaolinite using batch experiments. The adsorption of Sb(Ⅲ) on kaolinite was studied as a function of contact time, pH, ionic strength (I) and initial Sb(Ⅲ) concentration. Kinetic studies suggest that the equilibrium is achieved within 24 h. The adsorption of Sb(Ⅲ) was strongly affected by changes in I at low ionic strength and unaffected at high ionic strength. The adsorption is strongly dependent on pH and decreases with increasing of pH. Desorption depends on the original suspension pH. The adsorption data fit well the Freundlich isotherm. The thermodynamic parameters determined were the equilibrium constant, Keq=0.0755, and the Gibb’s free energy, △G0=6.403.

关键词： Sb(Ⅲ) adsorption kaolinite ionic strength pH

作者: XI Jianhong HE Mengchang

作者单位: State Key Laboratory of Water Environment Simulation,School of Environment,Beijing Normal University State Key Laboratory of Water Environment Simulation,School of Environment,Beijing Normal University

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: 431-435

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）