Effect of pH and Ionic Strength on the Adsorption of Antimony(Ⅲ) on Kaolinite
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.
Sb(Ⅲ) adsorption kaolinite ionic strength pH
XI Jianhong HE Mengchang
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
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
431-435
2009-06-02(万方平台首次上网日期,不代表论文的发表时间)