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首页> 外文期刊>Environmental Monitoring and Assessment >Removal of 8-quinolinecarboxylic acid pesticide from aqueous solution by adsorption on activated montmorillonites
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Removal of 8-quinolinecarboxylic acid pesticide from aqueous solution by adsorption on activated montmorillonites

机译:通过吸附在活性蒙脱土上去除水溶液中的8-喹啉羧酸农药

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摘要

Sodium montmorillonite (Na-M), acidic montmorillonite (H-M), and organo-acidic montmorillonite (Org-H-M) were applied to remove the herbicide 8-quinolinecarboxylic acid (8-QCA). The montmorillonites containing adsorbed 8-QCA were investigated by transmission electron microscopy, FT-BR spectrosco-py, X-ray diffraction analysis, X-ray fluorescence thermogravimetric analysis, and physical adsorption of gases. Experiments showed that the amount of adsorbed 8-QCA increased at lower pH, reaching a maximum at pH 2. The adsorption kinetics was found to follow the pseudo-second-order kinetic model. The Langmuir model provided the best correlation of experimental data for adsorption equilibria. The adsorption of 8-QCA decreased in the order Org-H-M > H-M > Na-M. Isotherms were also used to obtain the thermodynamic parameters. The negative values of ΔG indicated the spontaneous nature of the adsorption process.
机译:应用蒙脱土钠(Na-M),酸性蒙脱土(H-M)和有机酸性蒙脱土(Org-H-M)去除除草剂8-喹啉羧酸(8-QCA)。通过透射电子显微镜,FT-BR光谱,X射线衍射分析,X射线荧光热重分析和气体的物理吸附研究了吸附有8-QCA的蒙脱石。实验表明,在较低的pH值下,吸附的8-QCA的量增加,在pH值为2时达到最大值。发现吸附动力学遵循伪二级动力学模型。 Langmuir模型为吸附平衡提供了最佳的实验数据相关性。 8-QCA的吸附量按Org-H-M> H-M> Na-M的顺序降低。等温线也用于获得热力学参数。 ΔG的负值表示吸附过程的自发性。

著录项

  • 来源
    《Environmental Monitoring and Assessment》 |2013年第12期|10365-10375|共11页
  • 作者单位

    Laboratoire de Chimie Organique, Macromoleculaire et des Materiaux, Universite de Mascara, Bp 763, Mascara 29000, Algeria;

    Laboratoire de Chimie Organique, Macromoleculaire et des Materiaux, Universite de Mascara, Bp 763, Mascara 29000, Algeria;

    Laboratoire de Chimie Organique, Macromoleculaire et des Materiaux, Universite de Mascara, Bp 763, Mascara 29000, Algeria;

    Departamento de Ingenieria Textil y Papelera, Universitat Politecnica de Valencia, Pza Ferrandiz i Carbonel, 03801 Alcoy, Alicante, Spain;

    Departamento de Quimica Fisica e Instituto Universitario de Materiales, Universidad de Alicante, Apartado 99, 03080 Alicante, Spain;

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

    Adsorption isotherms; 8-Quinolinecarboxylic acid; Activated montmorillonite; Kinetics; Thermodynamic data;

    机译:吸附等温线;8-喹啉羧酸;活化蒙脱石;动力学;热力学数据;

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