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首页> 外文期刊>Applied Surface Science >Organosilane grafted acid-activated beidellite clay for the removal of non-ionic alachlor and anionic imazaquin
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Organosilane grafted acid-activated beidellite clay for the removal of non-ionic alachlor and anionic imazaquin

机译：有机硅烷接枝的酸活化贝得石粘土，用于去除非离子型甲草胺和阴离子型咪唑喹

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摘要

Clay adsorbents were prepared via two-step method to remove nonionic alachlor and anionic imazaquin herbicides from water. Firstly, layered beidellite clay, a member of smectite family, was treated with acid in hydrothermal process; secondly, common silane coupling agents, 3-chloro-propyl trimethoxysilane or triethoxy silane, were grafted on the acid treated samples to prepare adsorbent materials. The organically modified clay samples were characterized by powder X-ray diffraction, N_2 gas adsorption, and FT1R spectroscopy. It was found that the selective modification of clay samples displayed higher adsorption capacity for herbicides compared with acid activated clay. And the amount of adsorption is increased with increasing the grafting amount of silane groups. Clay grafted with 3-chloro-propyl trimethoxysilane is an excellent adsorbent for both alachlor and imazaquin but triethoxy (octyl) silane grafted clay is more efficient only for alachlor removal.
机译：通过两步法制备粘土吸附剂，以从水中去除非离子型甲草胺和阴离子型咪唑喹除草剂。首先，对蒙脱石族的层状贝得石粘土进行了水热法酸处理。其次，将普通的硅烷偶联剂3-氯丙基三甲氧基硅烷或三乙氧基硅烷接枝到酸处理过的样品上以制备吸附材料。通过粉末X射线衍射，N_2气体吸附和FT1R光谱对有机改性的粘土样品进行表征。发现与酸性活化粘土相比，粘土样品的选择性改性显示出对除草剂的更高吸附能力。并且吸附量随硅烷基团的接枝量的增加而增加。用3-氯-丙基三甲氧基硅烷接枝的粘土是对甲草胺和伊马喹喹的极佳吸附剂，但三乙氧基（辛基）硅烷接枝的粘土仅对除去甲​​草胺更有效。

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  • 来源
    《Applied Surface Science》 |2011年第13期|p.5552-5558|共7页
  • 作者

    Blain Paul; Wayde N. Martens; Ray L Frost;

  • 作者单位

    Discipline of Chemistry, Queensland University of Technology, Brisbane, Qld 4001, Australia;

    Discipline of Chemistry, Queensland University of Technology, Brisbane, Qld 4001, Australia;

    Discipline of Chemistry, Queensland University of Technology, Brisbane, Qld 4001, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    adsorption; beidellite; silanation; herbicide removal;

    机译：吸附;贝得石;硅化;除草剂的去除;

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