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首页> 外文期刊>Environmental Science & Technology >A Contaminant Trap as a Tool for Isolating and Measuring the Desorption Resistant Fraction of Soil Pollutants
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A Contaminant Trap as a Tool for Isolating and Measuring the Desorption Resistant Fraction of Soil Pollutants

机译：污染物阱作为隔离和测量土壤污染物抗解吸组分的工具

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摘要

Bioremediation of contaminated soils often leaves a desorption-resistant pollutant fraction behind in the soil, which in the present study was isolated with a combination of diffusive carrier and infinite diffusive sink. Such a diffusive sink was made by casting a composite of silicone and activated carbon into the bottom of a large glass. Field-contaminated soil samples were then suspended in a cyclodextrin solution and incubated in such glasses for the continuous trapping of PAH molecules during their release from the soil matrix. The PAH concentrations remaining in the soil were determined by exhaustive extraction and compared with a biodegradation experiment. The concentration decline in the first soil was faster in the contaminant trap than in the biodegradation experiment, but the halting of the biodegradation process before reaching the legal threshold level was well indicated by the contaminant trap. The PAH concentrations in the second soil hardly decreased in the traps at all, in good agreement with the biodegradation experiment. The PAHs in this soil appeared to be "stuck" by strong sorption. The contaminant trap proved to be a practical approach to the isolation and quantification of the desorption-resistant PAH fraction.
机译：受污染土壤的生物修复经常在土壤中留下抗解吸污染物部分，在本研究中，该污染物部分是由扩散载体和无限扩散池组合而成的。通过将有机硅和活性炭的复合材料浇铸到大玻璃杯的底部来制成这种扩散池。然后将现场污染的土壤样品悬浮在环糊精溶液中，并在此类玻璃瓶中孵育，以在PAH分子从土壤基质中释放期间连续捕获。通过彻底萃取确定土壤中残留的PAH浓度，并与生物降解实验进行比较。污染物捕集器中第一土壤的浓度下降比生物降解实验快，但是污染物捕集器很好地表明了在达到法定阈值水平之前生物降解过程的停止。陷阱中第二土壤中PAH的浓度几乎没有降低，这与生物降解实验非常吻合。这种土壤中的PAHs似乎被强吸附力“卡住”了。事实证明，污染物捕集器是分离和定量抗解吸PAH馏分的实用方法。

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  • 来源
    《Environmental Science & Technology》 |2011年第7期|p.2932-2937|共6页
  • 作者

    Philipp Mayer; Jannik L. Olsen; Varvara Gouliarmou; Marion Hasinger; Romana Kendler; Andreas P. Loibner;

  • 作者单位

    National Environmental Research Institute, Aarhus University, PO Box 358, 4000 Roskilde, Denmark;

    National Environmental Research Institute, Aarhus University, PO Box 358, 4000 Roskilde, Denmark,Department of Life Sciences and Chemistry, Roskilde University, PO Box 260, 4000 Roskilde, Denmark;

    National Environmental Research Institute, Aarhus University, PO Box 358, 4000 Roskilde, Denmark;

    IFA-Tulln, Department for Agrobiotechnology BOKU, University of Natural Resources and Life Sciences, Vienna 3430 Tulln, Austria;

    IFA-Tulln, Department for Agrobiotechnology BOKU, University of Natural Resources and Life Sciences, Vienna 3430 Tulln, Austria;

    IFA-Tulln, Department for Agrobiotechnology BOKU, University of Natural Resources and Life Sciences, Vienna 3430 Tulln, Austria;

  • 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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