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首页> 外文期刊>Environmental earth sciences >Removal of chromium(Ⅲ) from aqueous solutions by adsorption on bentonite from Gaomiaozi, China
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Removal of chromium(Ⅲ) from aqueous solutions by adsorption on bentonite from Gaomiaozi, China

机译:高庙子膨润土吸附去除水溶液中铬(Ⅲ)的研究

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摘要

The adsorption behaviors of Cr(Ⅲ) from aqueous solution by Gaomiaozi (GMZ) bentonite were studied using equilibrium batch techniques. The effects of shaking time, pH value, adsorbent dose, ionic strength and temperature on adsorption capacity of GMZ bentonite were investigated. The optimum pH value was defined to be 7.0 at temperature 293.15 K. Kinetic and isotherm experiments were carried out at the optimum pH. It was enough to reach the adsorption equilibrium at 2 h and the maximum adsorption capacity was 4.68 mg/g under the given experimental conditions. The equilibrium data were fitted to pseudo-second-order kinetic equation. The Freundlich adsorption isotherm models were conducted for the description of the adsorption process.
机译:采用平衡间歇法研究了高庙子膨润土对水溶液中Cr(Ⅲ)的吸附行为。研究了振荡时间,pH值,吸附剂量,离子强度和温度对GMZ膨润土吸附能力的影响。最佳pH值定义为在温度293.15 K下为7.0。在最佳pH下进行动力学和等温线实验。它足以在2 h达到吸附平衡,在给定的实验条件下最大吸附容量为4.68 mg / g。平衡数据拟合拟二阶动力学方程。进行了Freundlich吸附等温线模型以描述吸附过程。

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  • 来源
    《Environmental earth sciences》 |2012年第5期|p.1261-1268|共8页
  • 作者单位

    Department of Geotechnical Engineering and Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, 1239 Siping Road,Shanghai 200092, People's Republic of China;

    School of Civil Engineering and Architecture, Changsha University of Science and Technology, 960 Section II, South Wanjiali Road, Changsha 410114, People's Republic of China;

    Department of Geotechnical Engineering and Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, 1239 Siping Road,Shanghai 200092, People's Republic of China;

    School of Chemistry and Biological Engineering, Changsha University of Science and Technology, 960 Section II, South Wanjiali Road, Changsha 410114, People's Republic of China;

    School of Chemistry and Biological Engineering, Changsha University of Science and Technology, 960 Section II, South Wanjiali Road, Changsha 410114, People's Republic of China;

    Department of Geotechnical Engineering and Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, 1239 Siping Road,Shanghai 200092, People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    adsorption; Cr(Ⅲ); GMZ bentonite; pH; ionic strength; isotherms;

    机译:吸附Cr(Ⅲ);GMZ膨润土;pH值离子强度等温线;

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