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首页> 外文期刊>Environmental Science & Technology >Smoldering Remediation of Coal-Tar-Contaminated Soil: Pilot Field Tests of STAR
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Smoldering Remediation of Coal-Tar-Contaminated Soil: Pilot Field Tests of STAR

机译：煤焦油污染土壤的阴燃修复：STAR试验现场测试

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摘要

Self-sustaining treatment for active remediation (STAR) is an emerging, smoldering-based technology for non-aqueous-phase liquid (NAPL) remediation. This work presents the first in situ field evaluation of STAR. Pilot field tests were performed at 3.0 m (shallow test) and 7.9 m (deep test) below ground surface within distinct lithological units contaminated with coal tar at a former industrial facility. Self-sustained smoldering (i.e., after the in-well ignition heater was terminated) was demonstrated below the water table for the first time. The outward propagation of a NAPL smoldering front was mapped, and the NAPL destruction rate was quantified in real time. A total of 3700 kg of coal tar over 12 days in the shallow test and 860 kg over 11 days in the deep test was destroyed; less than 2% of total mass removed was volatilized. Self-sustaining propagation was relatively uniform radially outward in the deep test, achieving a radius of influence of 3.7 m; strong permeability contrasts and installed barriers influenced the front propagation geometry in the shallow test. Reductions in soil hydrocarbon concentrations of 99.3% and 97.3% were achieved in the shallow and deep tests, respectively. Overall, this provides the first field evaluation of STAR and demonstrates that it is effective in situ and under a variety of conditions and provides the information necessary for designing the full-scale site treatment.
机译：主动修复的自我维持处理（STAR）是一种新兴的基于阴燃的非水相液体（NAPL）修复技术。这项工作是对STAR的首次现场评估。在以前的工业设施中，在受煤焦油污染的不同岩性单元中，在地面以下3.0 m（浅层测试）和7.9 m（深层测试）下进行了现场试验。首次在水位以下展示了自持阴燃（即，井中点火加热器终止后）。绘制了NAPL阴燃锋面的向外传播，并实时定量了NAPL破坏率。在浅层试验的12天中，共消灭3700公斤煤焦油，在深层试验的11天中，共消灭860公斤煤焦油；少于所去除总质量的2％挥发。在深部测试中，自持的传播在径向上相对均匀，达到了3.7 m的影响半径。在浅层测试中，强烈的渗透率对比和安装的障碍影响了正面传播的几何形状。在浅层和深层试验中，土壤碳氢化合物浓度分别降低了99.3％和97.3％。总体而言，这提供了STAR的首次现场评估，并证明了它在各种条件下均有效，并且为设计全面的现场处理提供了必要的信息。

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  • 来源
    《Environmental Science & Technology》 |2015年第24期|14334-14342|共9页
  • 作者

    Grant C. Scholes; Jason I. Gerhard; Gavin P. Grant; David W. Major; John E. Vidumsky; Christine Switzer; Jose L. Torero;

  • 作者单位

    Savron, 130 Stone Road West, Guelph, ON, Canada N1G 3Z2;

    Department of Civil and Environmental Engineering, The University of Western Ontario, London, ON, Canada N6A 5B9;

    Savron, 130 Stone Road West, Guelph, ON, Canada N1G 3Z2;

    Savron, 130 Stone Road West, Guelph, ON, Canada N1G 3Z2;

    DuPont Corporate Remediation Group, Chestnut Run Plaza Building 730, Wilmington, Delaware 19805, United States;

    Department of Civil and Environmental Engineering, University of Strathclyde, 75 Montrose Street, Glasgow G1 1XJ, United Kingdom;

    School of Civil Engineering, University of Queensland, Brisbane 4072, Australia;

  • 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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