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首页> 外文期刊>Environmental Science & Technology >A Novel Combination of Anaerobic Bioleaching and Electrokinetics for Arsenic Removal from Mine Tailing Soil
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A Novel Combination of Anaerobic Bioleaching and Electrokinetics for Arsenic Removal from Mine Tailing Soil

机译：厌氧生物浸出与电动动力学相结合的矿山尾矿除砷新方法

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摘要

This study provides evidence that a hybrid method integrating anaerobic bioleaching and electrokinetics is superior to individual methods for arsenic (As) removal from mine tailing soil. Bioleaching was performed using static reactors in batch tests and flow conditions in column test, and each test was sequentially combined with electrokinetics. In the bioleaching, indigenous bacteria were stimulated by the injection of carbon sources into soil, leading to the mobilization of As with the concurrent release of Fe and Mn. Compared with the batch-type bioleaching process, the combined process showed enhanced removal efficiency in the equivalent time. Although the transport fluid bioleaching conditions were inadequate for As removal, despite long treatment duration, when followed by electrokinetics the combined process achieved 66.5% removal of As from the soil. The improvement of As removal after the combined process was not remarkable, compared with single electrokinetics, whereas a cost reduction of 26.4% was achieved by the reduced duration of electrokinetics. The As removal performance of electrokinetics was significantly dependenton the chemical species of As converted via microbial metal reduction in the anaerobic bioleaching. The synergistic effect of the combined process holds the promise of significant time and cost savings in As remediation.
机译：这项研究提供了证据，表明结合了厌氧生物浸出和电动动力学的混合方法优于从尾矿土壤中去除砷（As）的单个方法。在批次测试中使用静态反应器进行生物浸出，在柱测试中使用流动条件进行生物浸出，然后将每个测试顺序与电动学结合。在生物浸出过程中，通过向土壤中注入碳源来刺激本地细菌，从而导致As的迁移，同时释放Fe和Mn。与分批式生物浸出工艺相比，组合工艺在相同时间内显示出更高的去除效率。尽管运输液的生物浸出条件不足以去除砷，但是尽管处理时间长，但在进行电动动力学后，联合过程实现了从土壤中去除66.5％的砷。与单次电动化相比，组合工艺后去除砷的效果并不显着，而通过缩短电动化持续时间可将成本降低26.4％。电动势对砷的去除性能显着取决于厌氧生物浸出中通过微生物金属还原而转化的砷的化学种类。组合过程的协同效应有望在As修复中节省大量时间和成本。

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  • 来源
    《Environmental Science & Technology》 |2009年第24期|9354-9360|共7页
  • 作者

    KEUN-YOUNG LEE; IN-HO YOON; BYUNG-TAE LEE; SOON-OH KIM; KYOUNG-WOONG KIM;

  • 作者单位

    Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Republic of Korea;

    Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Republic of Korea;

    Department of Chemistry and Geochemistry, Colorado School of Mines, 1500 Illinois Street, Golden, Colorado 80401;

    Department of Earth and Environmental Sciences and Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, Republic of Korea;

    Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Republic of 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);
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