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Study on the adsorption of Hg(II) by one-pot synthesis decorated with a Fe3O4 microsphere nanocomposite

机译：用Fe3O4微球纳米复合材料用1罐合成吸附HG（II）的研究

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摘要

An easy one-pot solvothermal strategy approach has been reported on the preparation of ethylenediamine (EDA) decorated with magnetite/graphene oxide (EDA-Fe3O4/GO) nanocomposites and employed as a recyclable adsorbent for Hg(II) in aqueous solution. Taking advantage of the combined benefits of graphene and magnetic nanoparticles, these EDA-Fe3O4/GO nanocomposites exhibit an excellent adsorption capacity (127.23 mg g(-1)) much higher than that of Fe3O4 microspheres and rapid separation from aqueous solution by an external magnetic field. The adsorption isotherm data and the kinetics of the adsorption process were fitted using the Langmuir equation and a pseudo-second-order kinetic model. The results of the thermodynamic parameters Delta H, Delta S and Delta G showed that the adsorption process was endothermic and spontaneous. The graphene oxide (GO) sheets could not only prevent agglomeration of the Fe3O4 microspheres and enable a good dispersion of these oxide microspheres, but also substantially enhance the specific surface area of the composite. Therefore, the EDA-Fe3O4/GO nanocomposites may be a promising sorption material for the separation and preconcentration of heavy metal ions from aqueous solutions in environmental pollution cleanups.
机译：已经报道了一种易于一罐溶剂热策略方法，用于制备用磁铁矿/石墨烯（EDA-FE3O4 / GO）纳米复合材料装饰的乙二胺（EDA），并用作水溶液中HG（II）的可回收吸附剂。利用石墨烯和磁性纳米颗粒的组合益处，这些EDA-Fe3O4 / Go纳米复合材料表现出优异的吸附能力（127.23mg（-1））远高于Fe3O4微球的吸附容量，并通过外部磁性从水溶液的快速分离场地。使用Langmuir方程和伪二阶动力学模型配合吸附等温数据和吸附过程的动力学。热力学参数Delta H，Delta S和Delta G的结果表明，吸附过程是吸热和自发的。石墨烯（GO）片材不仅可以防止Fe3O4微球的附聚并且能够良好地分散这些氧化物微球，而且还基本上增强了复合材料的比表面积。因此，EDA-Fe3O4 / Go纳米复合材料可以是来自环境污染清洁中的水溶液的重金属离子的分离和前浓缩的有希望的吸附材料。

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  • 来源
    《RSC Advances》 |2016年第88期|共14页
  • 作者

    Liu Mingqiang; Tao Zhongan; Wang Huicai; Zhao Fei; Sun Qiang;

  • 作者单位

    Tianjin Polytech Univ Sch Environm &

    Chem Engn Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Sch Environm &

    Chem Engn Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Sch Environm &

    Chem Engn Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Sch Environm &

    Chem Engn Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Sch Environm &

    Chem Engn Tianjin 300387 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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