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Aminodextran Magnetic Colloidal Particles for Heavy Metals Removal

机译：氨基葡聚糖磁性胶体颗粒用于重金属去除

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摘要

Submicron aminodextran coated-magnetic poly(divinylbenzene) nanoparticles (AD-MPDVBs) have been prepared as magnetic adsorbents for removal of Cu(ll), Pb(ll) and Zn(!l) ions from aqueous solutions. AD-MPDVBs were prepared in two steps; the first step depends on the encapsulation of magnetic emulsion nanoparticles by the crosslinked poly(divinylbenzene) shell, followed by electrostatic adsorptions of aminodextran on their surface. The successful formation of AD-MPDVBs was evidenced by transmission electron microscope (TEM), zeta potential measurements and thermal gravimetric analysis (TGA). In addition, particle size and size distribution, magnetic content and magnetic properties of AD-MPDVBs were also investigated. The key parameters which can affect metal ions uptake efficiency of AD-MPDVBs including contact time, initial metal ion concentration and pH of the solution has been studied. The obtained results showed that AD-MPDVBs exhibited high and fast adsorption of Cu(ll), Pb(ll), and Zn(ll) ions, and the equilibrium was achieved within 30 min. Furthermore, for equilibrium studies, two isotherm models were used in this study; Freundlich and Langmuir models. The equilibrium studies showed that the adsorption of Cu(ll), Pb(ll), and Zn(ll) follows Langmuir isotherm model and the maximum sorption capacity of AD-MPDVBs was found to be 11.62, 100 and 40 mg/g for Cu~(2+), Pb~(2+) and Zn~(2+), respectively. In addition, the adsorption process could be described by pseudo-second-order kinetic model, and the mechanism of Cu(ll), Pb(ll), and Zn(ll) ions sorption onto AD-MPDVBs was tentatively proposed. Furthermore, a comparison study was carried out between maximum sorption capacity of the prepared AD-MPDVBs and those obtained by using various magnetic/polymer hybrids in the literature. The prepared AD-MPDVBs showed promising results which make them convenient to serve as effective adsorbents for removal of heavy metal ions from wastewater.
机译：已经制备了亚微米的氨基葡聚糖涂覆的磁性聚（二乙烯基苯）纳米颗粒（AD-MPDVBs）作为磁性吸附剂，用于从水溶液中去除Cu（II），Pb（II）和Zn（III）离子。 AD-MPDVB分为两个步骤：第一步取决于交联的聚（二乙烯基苯）壳对磁性乳液纳米颗粒的封装，然后将氨基葡聚糖静电吸附在其表面上。透射电子显微镜（TEM），ζ电位测量和热重分析（TGA）证明了AD-MPDVB的成功形成。另外，还研究了AD-MPDVB的粒度和粒度分布，磁含量和磁性能。研究了影响AD-MPDVBs金属离子吸收效率的关键参数，包括接触时间，初始金属离子浓度和溶液的pH值。获得的结果表明，AD-MPDVBs表现出对Cu（II），Pb（II）和Zn（II）离子的快速吸附，并且在30分钟内达到平衡。此外，对于平衡研究，本研究使用了两个等温线模型。 Freundlich和Langmuir模型。平衡研究表明，Cu（II），Pb（II）和Zn（II）的吸附遵循Langmuir等温模型，AD-MPDVBs对Cu的最大吸附容量为11.62、100和40 mg / g 〜（2 +），Pb〜（2+）和Zn〜（2+）。此外，吸附过程可以用拟二级动力学模型来描述，并初步提出了Cu（II），Pb（II）和Zn（II）离子吸附在AD-MPDVBs上的机理。此外，在制备的AD-MPDVBs的最大吸附能力与通过文献中使用各种磁性/聚合物杂化剂获得的最大吸附能力之间进行了比较研究。制备的AD-MPDVBs显示出令人鼓舞的结果，使其方便用作从废水中去除重金属离子的有效吸附剂。

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  • 来源
    《Science of advanced materials》 |2013年第7期|854-864|共11页
  • 作者

    Amel Chaabouni; Zied Marzougui; Boubaker Elleuch; Mohamed M. Eissa; Abdelhamid Elaissari;

  • 作者单位

    Laboratoire Eau Energie et Environnement, Ecole Nationale d'lngenieurs de Sfax, B.P. 1173, 3038, Sfax-Tunisia;

    Laboratoire Eau Energie et Environnement, Ecole Nationale d'lngenieurs de Sfax, B.P. 1173, 3038, Sfax-Tunisia;

    Laboratoire Eau Energie et Environnement, Ecole Nationale d'lngenieurs de Sfax, B.P. 1173, 3038, Sfax-Tunisia;

    University of Lyon, F-69622, Lyon, France, Lyon 1 University, Villeurbanne,LAGEP, UMR 5007, CNRS, CPE, F-69622 Villeurbanne, France,Department, National Research Centre, Dokki, Giza 12622, Egypt;

    University of Lyon, F-69622, Lyon, France, Lyon 1 University, Villeurbanne,LAGEP, UMR 5007, CNRS, CPE, F-69622 Villeurbanne, France;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Aminodextran; Nanoparticles; Metal Ions Uptake; Magnetic Separation;

    机译：氨基葡聚糖;纳米颗粒;金属离子吸收;磁选;

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