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首页> 外文期刊>Journal of Hazardous Materials >Utilization of recycled charcoal as a thermal source and adsorbent for the treatment of PCDD/Fs contaminated sediment
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Utilization of recycled charcoal as a thermal source and adsorbent for the treatment of PCDD/Fs contaminated sediment

机译：利用再生木炭作为热源和吸附剂处理PCDD / Fs污染的沉积物

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摘要

A novel heat treatment process in which charcoal was used as both a thermal source and an adsorbent was investigated as a low-cost method for removal of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) from solids. Three laboratory scale experiments involving various ratios of charcoal to contaminated sediment and air superficial velocities were performed. The results indicated that the total and toxic equivalency quantities (TEQ) concentrations of PCDD/Fs decreased significantly in the treated sediment of all runs with removal efficiencies greater than 96% and 90%, which resulted in residual concentrations below the Japanese standard limit of 0.15ng-TEQ g~(-1). The charcoal/contaminated sediment ratio and air superficial velocity were determinant factors controlling the PCDD/Fs concentrations and homologue profiles in effluent. As the air superficial velocity increased and charcoal/contaminated sediment ratio decreased, more PCDD/Fs were released from the sediment as fly ash, making them less likely to remain in the treated sediment. These phenomena were likely a result of the vapor pressure of PCDD/Fs, contact time with effluent gas and amount of PCDD/Fs adsorbed by charcoal. The developed process would promise an alternative to a conventional remediation process for PCDD/Fs contaminated solids.
机译：作为一种从固体中去除多氯二苯并对二恶英（PCDDs）和多氯二苯并呋喃（PCDFs）的低成本方法，人们研究了一种以炭为热源和吸附剂的新型热处理工艺。进行了三个实验室规模的实验，涉及各种比例的木炭与受污染的沉积物以及空气表面速度。结果表明，在所有运行过程中，经处理的沉积物中PCDD / Fs的总和毒性当量量（TEQ）浓度均显着降低，去除效率分别大于96％和90％，这导致残留浓度低于日本标准限值0.15 ng-TEQ g〜（-1）。木炭/受污染的沉积物比率和空气表面速度是控制污水中PCDD / Fs浓度和同系物分布的决定性因素。随着空气表观速度的增加和木炭/污染的沉积物比率的降低，更多的PCDD / Fs以粉煤灰的形式从沉积物中释放出来，使它们不太可能残留在处理过的沉积物中。这些现象可能是由于PCDD / Fs的蒸气压，与废气的接触时间以及木炭吸附的PCDD / Fs的量所致。所开发的工艺将有望替代PCDD / Fs污染固体的常规修复工艺。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第30期|p.182-189|共8页
  • 作者

    Long Zhao; Hong Hou; Kanae Iwasaki; Akihiko Terada; Masaaki Hosomi;

  • 作者单位

    Department of Chemical Engineering, Faculty of Engineering Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan;

    State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Dayangfang 8. Beijing 100012, PR China;

    Department of Chemical Engineering, Faculty of Engineering Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan;

    Department of Chemical Engineering, Faculty of Engineering Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan;

    Department of Chemical Engineering, Faculty of Engineering Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan;

  • 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

    PCDD/Fs; charcoal; thermal source; adsorbent; low-cost;

    机译：PCDD / Fs;木炭;热源吸附剂低成本;

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