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首页> 外文期刊>RSC Advances >Properties and mechanism for selective adsorption of Au(iii) on an ionic liquid adsorbent by graftingN-methyl imidazole onto chloromethylated polystyrene beads
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Properties and mechanism for selective adsorption of Au(iii) on an ionic liquid adsorbent by graftingN-methyl imidazole onto chloromethylated polystyrene beads

机译：通过将丙烯甲基咪唑胶甲基化聚苯乙烯珠子在离子液体吸附剂上选择性和机制对离子液体吸附剂的选择性和机制

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摘要

To recover Au(iii) from an acidic chloride-containing solution efficiently, an ionic liquid absorbent (CMPS-IL) was synthesized by graftingN-methyl imidazole onto chloromethylated polystyrene beads (CMPS). The adsorption capacity, selectivity, and reusability were systematically evaluated by a series of adsorption experiments. The maximum adsorption capacity reached up to 516.5 mg g(-1)at 318 K. The adsorbent can selectively recover Au(iii) from binary system solutions with a higher separation factor beta(Au/M)(10(4)-10(6)). Moreover, the adsorption-desorption cycles (7 cycles) showed that the CMPS-IL maintained a stable adsorption performance and high adsorption efficiency. Finally, the adsorption mechanism of CMPS-IL for Au(iii) was investigated by SEM, TEM, XPS, and FT-IR, then proposed with a combination of electrostatic interactions and d-pi interaction between imidazolium and AuCl4-. This study provides an easily-prepared and economical adsorbent for Au(iii) with high selectivity and large adsorption capacity to boost its practical applications.
机译：为了有效地从含酸性氯化物的溶液中回收Au（III），通过将离子液体吸收剂（CMPS-IL）通过胶合肼 - 甲基咪唑在氯甲基化的聚苯乙烯珠（CMPS）上合成。通过一系列吸附实验系统地评估吸附容量，选择性和可重用性。在318k的318k下最大吸附容量达到516.5mg g（-1）。吸附剂可以选择性地从二元体系溶液中回收Au（iii），具有较高的分离因子β（au / m）（10（4）-10（ 6））。此外，吸附 - 解吸循环（7个循环）表明CMPS-IL保持稳定的吸附性能和高吸附效率。最后，通过SEM，TEM，XPS和FT-IR研究了AU（III）的CMPS-IL的吸附机理，然后提出了咪唑鎓和AuCl4-之间的静电相互作用和D-Pi相互作用的组合。本研究为AU（III）提供了一种易于准备和经济的吸附剂，具有高选择性和大吸附能力，以提高其实际应用。

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  • 来源
    《RSC Advances》 |2020年第34期|共11页
  • 作者

    Kou Xin; Ma Bowen; Zhang Rui; Cai Miaomiao; Huang Yong; Yang Ying;

  • 作者单位

    Lanzhou Univ Key Lab Nonferrous Met Chem &

    Resources Utilizat Sch Chem &

    Chem Engn Lanzhou 730000 Peoples R China;

    Lanzhou Univ Key Lab Nonferrous Met Chem &

    Resources Utilizat Sch Chem &

    Chem Engn Lanzhou 730000 Peoples R China;

    Lanzhou Univ Key Lab Nonferrous Met Chem &

    Resources Utilizat Sch Chem &

    Chem Engn Lanzhou 730000 Peoples R China;

    Lanzhou Univ Key Lab Nonferrous Met Chem &

    Resources Utilizat Sch Chem &

    Chem Engn Lanzhou 730000 Peoples R China;

    Lanzhou Univ Key Lab Nonferrous Met Chem &

    Resources Utilizat Sch Chem &

    Chem Engn Lanzhou 730000 Peoples R China;

    Lanzhou Univ Key Lab Nonferrous Met Chem &

    Resources Utilizat Sch Chem &

    Chem Engn Lanzhou 730000 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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