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首页> 外文期刊>Materials Chemistry and Physics >Facile synthesis, characterization of a MnFe_2O_4/activated carbon magnetic composite and its effectiveness in tetracycline removal
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Facile synthesis, characterization of a MnFe_2O_4/activated carbon magnetic composite and its effectiveness in tetracycline removal

机译：MnFe_2O_4 /活性炭磁性复合材料的合成，表征及其在四环素去除中的有效性

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摘要

In this study, MnFe_2O_4/activated carbon magnetic composites with mass ratio of 1:1,1:1.5 and 1:2 were synthesized using a simple chemical coprecipitation procedure. A variety of techniques such as X-ray diffractometer, scanning electron microscope, magnetization measurements, BET surface area measurements were used to characterize the structure, morphology and magnetic performance of the prepared composite adsorbents. The results showed that the composites had good magnetic properties, which allowed their convenient magnetic separation from water. Spinel manganese ferrite was found to occur in the magnetic phase and the presence of magnetic particles of MnFe_2O_4 did not significantly affect the surface area and pore structure of the activated carbon. The magnetic composites were effective for tetracycline (TC) removal from water and the maximal adsorption capacity was 590.5 mmol kg~(-1) at pH 5.0. The TC adsorption followed pseudo-second-order kinetic model and its removal decreases gradually with an increase in pH value, whereas the removal rate was over 60% even at pH 9.0. The TC adsorption process is endothermic and the increase of temperature is favoring its removal. All these results indicated that the prepared composites had the potential to be used as adsorbents for the removal of TC from water or wastewater.
机译：本研究采用简单的化学共沉淀法合成了质量比为1：1、1：1.5和1：2的MnFe_2O_4 /活性炭磁性复合材料。使用各种技术（例如X射线衍射仪，扫描电子显微镜，磁化强度测量，BET表面积测量）来表征制备的复合吸附剂的结构，形态和磁性能。结果表明，该复合材料具有良好的磁性，可以方便地与水分离。发现尖晶石锰铁氧体存在于磁性相中，并且MnFe_2O_4磁性颗粒的存在对活性炭的表面积和孔结构没有明显影响。磁性复合材料有效去除水中的四环素，在pH 5.0时最大吸附量为590.5 mmol kg〜（-1）。 TC吸附遵循伪二级动力学模型，并且随着pH值的增加，其去除率逐渐降低，而即使在pH 9.0时，去除率也超过60％。 TC吸附过程是吸热的，温度升高有利于其去除。所有这些结果表明，所制备的复合材料具有用作从水或废水中去除TC的吸附剂的潜力。

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  • 来源
    《Materials Chemistry and Physics》 |2012年第1期|16-24|共9页
  • 作者

    Lina Shao; Zongming Ren; Gaosheng Zhang; Linlin Chen;

  • 作者单位

    Key Laboratory of Coastal Environment Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;

    Key Laboratory of Coastal Environment Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China;

    Key Laboratory of Coastal Environment Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China;

    Key Laboratory of Coastal Environment Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    activated carbon; magnetic composite; tetracycline; magnetic separation; adsorption;

    机译：活性炭;磁性复合材料四环素;磁选;吸附;

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