Influence of rain on tetrachloroethylene’s multiphase migration in soil

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• 作者：Yong Qian ; Jingli Shao ; Zhaoji Zhang ; Yuhong Fei ; Chunxiao Wang…
• 关键词：volatile organic pollution ; soil water migration ; tetrachloroethylene (PCE) ; gas phase
• 刊名：Journal of Earth Science
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：26
• 期：3
• 页码：453-460
• 全文大小：403 KB
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• 作者单位：Yong Qian (1) (2) (3)
  Jingli Shao (1)
  Zhaoji Zhang (2)
  Yuhong Fei (2) (3)
  Chunxiao Wang (2)
  Xiangxiang Cui (2) (3)
  Suhua Meng (2) (3)
  
  1. School of Water Resources & Environment, China University of Geosciences, Beijing, 100083, China
  2. The Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, 050061, China
  3. Hebei Key Laboratory of Groundwater Remediation, Shijiazhuang, 050061, China
  
• 刊物主题：Earth Sciences, general; Geotechnical Engineering & Applied Earth Sciences; Biogeosciences; Geochemistry; Geology;
• 出版者：Springer Berlin Heidelberg
• ISSN：1867-111X

文摘

For the increasingly serious soil and groundwater pollution by volatile organic compounds, tetrachloroethylene (PCE) was selected as the research object in this study. With the in-situ soil column physical simulation experiments, migration law of PCE in soil under rain conditions was studied by monitoring precipitation and soil parameter as well as sampling and analyzing soil and soil gas, and influence of rain on the multiphase migration process of PCE was preliminarily discussed. Research shows that migrations of PCE and soil moisture were not synchronous, and the rate of the former was speeded up by the latter caused by rain. Preliminary analysis indicates that migration of volatile chlorohydrocarbon in soil was not only driven by soil moisture, but also controlled by the nature of volatility of their own, that is to say, volatilization into gas phase was an important way of migrating and diffusing in pore medium, and the rate of migration and diffusion of gaseous PCE was faster than that of solid, resulting in more abroad distribution of gas phase than that in solid phase.