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Selective enrichment of low concentration Au(III) from acidic chloride media by poly ionic liquid sorbent

机译:聚离子液体吸附剂从酸性氯化物培养基中选择性富集低浓度Au(III)

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摘要

Hydrophilic ionic liquid (imidazolium chloride, imCl)-polyvinyl chloride ionomer (imCl-PVC) as a green sorbent to recover precious gold from acidic chloride solution was characterized by SEM, FTIR, XPS and NMR. Potential rate controlling steps of the adsorption process are modeled by the best-fit of the kinetic curve (pseudo-second-order), and isotherm (Langmuir) parameters. The wide range of pH (1-6), competing heavy metals (Cu, Cd, Co, Cr, Ni, and Mn) and the high Cl- concentration showed least interference. The results of XPS analysis showed that the Au(III) ion sorption was an electrostatic attraction-reduction process. Moreover, a stripping agent (thiourea) desorbed 88% of ionic gold. The spent adsorbent could be regenerated well and retained above 64% of the recovery efficiency at the end of the fifth cycle. The performance characteristics of imCl-PVC to enrich gold can be applied in the treatment of gold-contaminated water.
机译:通过SEM,FTIR,XPS和NMR,将亲水离子液体(Imcazolium氯化物,IMCL) - 聚氯乙烯离聚物(IMCL-PVC)作为酸性氯化物溶液中贵重的金。 吸附过程的潜在速率控制步骤由动力学曲线(伪二阶)和等温(Langmuir)参数的最佳拟合进行建模。 竞争重金属(Cu,Cd,Co,Cr,Ni和Mn)和高Cl浓度的宽的pH(1-6),呈现最小干扰。 XPS分析的结果表明,Au(III)离子吸附是静电吸引还原过程。 此外,剥离剂(硫脲)解吸了88%的离子金。 在第五循环结束时,可以良好地再生吸附吸附剂并保留高于恢复效率的64%。 IMCL-PVC的性能特征可以应用于染色污染水的处理。

著录项

  • 来源
    《RSC Advances》 |2016年第67期|共8页
  • 作者

    Gui Wenjun; Zhu Xuan; Yang Ying;

  • 作者单位

    Lanzhou Univ Dept Chem &

    Chem Engn Lanzhou 730000 Peoples R China;

    Lanzhou Univ Dept Chem &

    Chem Engn Lanzhou 730000 Peoples R China;

    Lanzhou Univ Dept Chem &

    Chem Engn Lanzhou 730000 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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