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首页> 外文期刊>Journal of Contaminant Hydrology >Laboratory study of non-aqueous phase liquid and water co-boiling during thermal treatment
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Laboratory study of non-aqueous phase liquid and water co-boiling during thermal treatment

机译：热处理过程中非水相液体和水共沸的室内研究

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摘要

In situ thermal treatment technologies, such as electrical resistance heating and thermal conductive heating, use subsurface temperature measurements in addition to the analysis of soil and groundwater samples to monitor remediation performance. One potential indication of non-aqueous phase liquid (NAPL) removal is an increase in temperature following observations of a co-boiling plateau, during which subsurface temperatures remain constant as NAPL and water co-boil. However, observed co-boiling temperatures can be affected by the composition of the NAPL and the proximity of the NAPL to the temperature measurement location. Results of laboratory heating experiments using single-component and multi-component NAPLs showed that local-scale temperature measurements can be mistakenly interpreted as an indication of the end of NAPL-water co-boiling, and that significant NAPL saturations (1% to 9%) remain despite observed increases in temperature. Furthermore, co-boiling of multi-component NAPL results in gradually increasing temperature, rather than a co-boiling plateau. Measurements of gas production can serve as a complementary metric for assessing NAPL removal by providing a larger-scale measurement integrated over multiple smaller-scale NAPL locations. Measurements of the composition of the NAPL condensate can provide ISTT operators with information regarding the progress of NAPL removal for multi-component sources.
机译：在现场热处理技术中，例如电阻加热和导热加热，除了对土壤和地下水样品进行分析之外，还使用地下温度测量来监测修复性能。非水相液体（NAPL）去除的一个潜在迹象是观察到共沸平台之后温度升高，在此期间，地下温度随着NAPL和水共沸而保持恒定。但是，观察到的共沸温度会受到NAPL的成分以及NAPL与温度测量位置的接近程度的影响。使用单组分和多组分NAPL进行的实验室供热实验的结果表明，局部温度测量可能被误认为是NAPL-水共沸结束的指示，并且NAPL显着饱和（1％至9％ ）尽管观察到温度升高仍然存在。此外，多组分NAPL的共沸导致温度逐渐升高，而不是共沸平台。通过提供在多个较小规模的NAPL位置上集成的较大规模的测量值，天然气产量的测量值可以用作评估NAPL去除量的补充指标。对NAPL冷凝物成分的测量可以为ISTT操作员提供有关多组分源NAPL去除进度的信息。

著录项

  • 来源
    《Journal of Contaminant Hydrology》 |2014年第8期|49-58|共10页
  • 作者

    C. Zhao; K.G. Mumford; B.H. Kueper;

  • 作者单位

    Department of Civil Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada;

    Department of Civil Engineering, Queen's University, 58 University Avenue, Kingston, Ontario K7L 3N6, Canada;

    Department of Civil Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada;

  • 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

    Non-aqueous phase liquid; Multi-component; Remediation; Thermal treatment;

    机译：非水相液体;多成分;补救措施;热处理;

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