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Effect of humic acid on the Cr(VI) adsorption onto Kaolin

机译:腐殖酸对高岭土吸附Cr(VI)的影响

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摘要

The adsorption of chromate on kaolin/humic acid was studied at various conditions of initial solution pH, ionic strength, water hardness and temperatures. The increased adsorption of chromate in the presence of HA was attributed to the reducing action and complexation of HA. The addition of inorganic salts (Na~+, Ca~(2+) and Mg~(2+)) reduced the adsorption of chromate because of the high coagulation power of these ions. The Langmuir isotherm model fitted the equilibrium data well at low Cr(VI) concentrations. The saturation amounts for Cr(VI) adsorbed by kaolin were 0.14, 0.16 and 0.20 mmol Cr/g at 283 K, 293 K and 303 K, respectively. The adsorption process was endothermic.
机译:在初始溶液pH,离子强度,水硬度和温度的各种条件下研究了铬酸盐在高岭土/腐植酸上的吸附。在HA存在下铬酸盐的吸附增加归因于HA的还原作用和络合。无机盐(Na〜+,Ca〜(2+)和Mg〜(2+))的添加降低了铬酸盐的吸附,因为这些离子具有很高的凝聚力。 Langmuir等温线模型在低Cr(VI)浓度下很好地拟合了平衡数据。高岭土吸附的Cr(VI)在283 K,293 K和303 K时的饱和量分别为0.14、0.16和0.20 mmol Cr / g。吸附过程是吸热的。

著录项

  • 来源
    《Applied clay science》 |2010年第3期|p.481-484|共4页
  • 作者

    Ying Li; Qin-Yan Yue; Bao-Yu Gao;

  • 作者单位

    Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China;

    Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China;

    Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    chromate; humic acid; kaolin; adsorption;

    机译:铬酸盐;腐植酸;高岭土吸附;
  • 入库时间 2022-08-17 13:55:23

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