Influence of Rain on Tetrachloroethylene's Multiphase Migration in Soil

作     者：Yong Qian Jingli Shao Zhaoji Zhang Yuhong Fei Chunxiao Wang Xiangxiang Cui Suhua Meng 

作者机构：School of Water Resources & Environment China University of Geosciences The Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological Sciences Hebei Key Laboratory of Groundwater Remediation 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2015年第26卷第3期

页      面：453-460页

核心收录：

学科分类：083001[工学-环境科学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the National Program on Key Basic Research Project (973 Program) (No. 2010CB428804-1) the National Natural Science Foundation of China (No. 41402230) the Key Laboratory Open Founda-tion of Chinese Academy of Geological Sciences (No. SYS1305) Groundwater Science and Engineering Experimental Site in field of Ministry of Land and Resources of China for providing site and the site workers’ support 

主　　题：volatile organic pollution soil water migration tetrachloroethylene(PCE) gas phase 

摘      要：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.