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首页> 外文期刊>Environmental Pollution >Fabrication of magnetic biochar 'as a treatment medium for As(V) via pyrolysis of FeCl3-pretreated spent coffee ground
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Fabrication of magnetic biochar 'as a treatment medium for As(V) via pyrolysis of FeCl3-pretreated spent coffee ground

机译:通过FeCl3预处理的废咖啡渣的热解制备磁性生物炭作为As(V)的处理介质

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摘要

This study investigated the preparation of magnetic biochar from N-2- and CO2-assisted pyrolysis of spent coffee ground (SCG) for use as an adsorption medium for As(V), and the effects of FeCl3 pretreatment of SCG on the material properties and adsorption capability of the produced biochar. Pyrolysis of FeCl3-pretreated SCG in CO2 atmosphere produced highly porous biochar with its surface area 70 times greater than that produced in N-2 condition. However, despite the small surface area, biochar produced in N-2 showed greater As(V) adsorption capability. X-ray diffraction and X-ray photoelectron spectrometer analyses identified Fe3C and Fe3O4 as dominant mineral phases in N-2 and CO2 conditions, with the former being much more adsorptive toward As(V). The overall results suggest functional biochar can be facilely fabricated by necessary pretreatment to expand the applicability of biochar for specific purposes. (C) 2017 Elsevier Ltd. All rights reserved.
机译:这项研究调查了由N-2-和CO2辅助的废咖啡渣(SCG)的热解制备磁性生物炭(用作As(V)的吸附介质),以及FeCl3预处理SCG对材料性能和性能的影响。产生的生物炭的吸附能力。 FeCl3预处理的SCG在CO2气氛中的热解产生了高度多孔的生物炭,其表面积是N-2条件下产生的表面积的70倍。但是,尽管表面积很小,但在N-2中产生的生物炭显示出更高的As(V)吸附能力。 X射线衍射和X射线光电子能谱仪分析确定,Fe3C和Fe3O4是N-2和CO2条件下的主要矿物相,前者对As(V)的吸附性强。总体结果表明,可以通过必要的预处理来方便地制备功能性生物炭,以扩大生物炭在特定目的上的适用性。 (C)2017 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Environmental Pollution》 |2017年第10期|942-949|共8页
  • 作者单位

    Sejong Univ, Dept Environm & Energy, Seoul 05006, South Korea;

    Sejong Univ, Dept Environm & Energy, Seoul 05006, South Korea;

    Sejong Univ, Dept Environm & Energy, Seoul 05006, South Korea;

    Univ Kalyani, Dept Ecol Studies, Pollut Ecotoxicol & Ecotechnol Res Unit, Nadia 741235, W Bengal, India;

    Sejong Univ, Dept Environm & Energy, Seoul 05006, South Korea;

  • 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);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Reactive gas; Mineral phase change; Magnetic biochar; Adsorption; As(V);

    机译:活性气体;矿物相变;磁性生物炭;吸附;As(V);

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