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首页> 外文期刊>Clean technologies and environmental policy >Investigation of sorbents synthesised by mechanical-chemical reaction for sorption of As(Ⅲ) and As(Ⅴ) from aqueous medium
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Investigation of sorbents synthesised by mechanical-chemical reaction for sorption of As(Ⅲ) and As(Ⅴ) from aqueous medium

机译：机械化学反应合成吸附剂从水介质中吸附As（Ⅲ）和As（Ⅴ）的研究

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摘要

Efficiency of Fe_2O_3 and mixture of Fe_2O_3 and MnO_2 nanoparticles synthesised by mechanical-chemical reaction for inorganic As(Ⅲ) and As(Ⅴ) sorption was examined. Sorbents (Fe_2O_3 and mixture Fe_2O_3:MnO_2 = 3∶1) synthesised by mechanical-chemical treatment in planetary ball mile with different milling times were tested by batch experiments. Experimental data were fitted both to Freundlich and Langmuir adsorption models. Efficiency of sorption was in good correlation with the time of milling in case of pure oxide. There were small differences in sorption between As(Ⅲ) and As(Ⅴ). In the case of mixture of oxides results were different. The best results were obtained by 30 min of milling. With prolonged milling, the sorption decreased to 3 h and after that increased again. These results were explained by phase transition. Sorption kinetics, influence of pH and the presence of other anions were examined for mixture of oxides with highest sorption capacity. The bioavailability of sorbed arsen was tested using modified Tessier procedure.
机译：考察了通过机械化学反应合成的Fe_2O_3以及Fe_2O_3和MnO_2纳米粒子的混合物对无机As（Ⅲ）和As（Ⅴ）的吸附效率。通过分批实验测试了在不同研磨时间的行星球英里中通过机械化学处理合成的吸附剂（Fe_2O_3和Fe_2O_3：MnO_2的混合物= 31：1）。实验数据都适用于Freundlich和Langmuir吸附模型。在纯氧化物的情况下，吸附效率与研磨时间密切相关。 As（Ⅲ）和As（Ⅴ）之间的吸附差异很小。在混合氧化物的情况下，结果是不同的。研磨30分钟可获得最佳结果。长时间研磨后，吸附量减少至3小时，此后再次增加。通过相变解释了这些结果。考察了吸附动力学，pH值的影响以及其他阴离子的存在，以确定具有最高吸附能力的氧化物混合物。使用改良的Tessier程序测试吸附砷的生物利用度。

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  • 来源
    《Clean technologies and environmental policy》 |2014年第2期|395-403|共9页
  • 作者

    I. Andjelkovic; J. Nesic; D. Stankovic; D. Manojlovic; M. B. Pavlovic; C. Jovalekic; G. Roglic;

  • 作者单位

    Innovation Center of the Faculty of Chemistry, University of Belgrade, Studentski Trg 12-16, Belgrade, Serbia;

    Innovation Center of the Faculty of Chemistry, University of Belgrade, Studentski Trg 12-16, Belgrade, Serbia;

    Innovation Center of the Faculty of Chemistry, University of Belgrade, Studentski Trg 12-16, Belgrade, Serbia;

    Faculty of Chemistry, University of Belgrade, Studentski Trg 12-16, Belgrade, Serbia;

    Faculty of Electrical Engineering, University of Belgrade, B. Kralja Aleksandra 73, Belgrade, Serbia;

    Institute for Multidisciplinary Research, University of Belgrade, Kneza Viseslava la, 11000 Belgrade, Serbia;

    Faculty of Chemistry, University of Belgrade, Studentski Trg 12-16, Belgrade, Serbia;

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

    Arsenic removal; Adsorption; Kinetics; Isotherms;

    机译：除砷;吸附;动力学;等温线;

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