Influence of Rain on Tetrachloroethylene’s Multiphase Migration in Soil

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 monit...

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Bibliographic Details
Published in:Journal of earth science (Wuhan, China) China), 2015-06, Vol.26 (3), p.453-460
Main Authors: Qian, Yong, Shao, Jingli, Zhang, Zhaoji, Fei, Yuhong, Wang, Chunxiao, Cui, Xiangxiang, Meng, Suhua
Format: Article
Language:English
Subjects:
Atmospheric precipitations
Biogeosciences
Diffusion rate
Dye dispersion
Earth and Environmental Science
Earth Sciences
Environmental monitoring
Geochemistry
Geology
Geotechnical Engineering & Applied Earth Sciences
Groundwater
Groundwater pollution
Migration
Multiphase
Organic compounds
Physical simulation
Precipitation
Rain
Simulation
Soil
Soil analysis
Soil columns
Soil conditions
Soil gas
Soil gases
Soil moisture
Soil pollution
Soils
Tetrachloroethylene
VOCs
Volatile organic compounds
Volatility
Volatilization
四氯乙烯
土壤湿度
土壤物理
多相
挥发性有机化合物
挥发性氯代烃
迁移过程
降雨条件
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Summary: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.
ISSN:1674-487X
1867-111X
DOI:10.1007/s12583-015-0547-6