某典型污染场地土壤中氯代烃类污染的空间分布与污染成因  

SPATIAL DISTRIBUTION AND CAUSES OF CHLORINATED HYDROCARBONS POLLUTION IN SOIL IN A TYPICAL CONTAMINATED SITE

作　　者：牛真茹 李飞飞[2] 张有军[1] 曲为贵 从辉 刘仕刚[1] 张佳 NIU Zhenru;LI Feifei;ZHANG Youjun;QU Weigui;CONG Hui;LIU Shigang;ZHANG Jia(Tianjin North China Geological Exploration General Institute,Tianjin 300170,China;Beijing Urban Construction Exploration&Surveying Design Research Institute Co.,Ltd,Beijing 100089,China;China University of Geosciences(Beijing),Beijing 100089,China)

机构地区：[1]天津华北地质勘查总院,天津300170 [2]北京城建勘测设计研究院有限责任公司,北京100089 [3]中国地质大学(北京),北京100089

出　　处：《环境工程》2022年第3期94-101,228,共9页Environmental Engineering

基　　金：国家重点研发项目“典型卤代有机污染物土壤-水多介质多过程反应迁移模型”(2020YFC1807002);科研项目“天津某典型污染场地土壤和地下水中氯代烃类的迁移转化数值模拟研究”(HK2020-B9)。

摘　　要：针对氯代烃类污染物在天津海陆交互相沉积成因第四系中的空间分布与成因研究,选取了生产历史长达19年的某农药原料提纯污染场地,通过地质勘察、监测采样与测试分析等手段查明了该场地土壤中氯代烃类污染的空间分布与污染成因。结果表明:该场地内超标的氯代烃类包括三氯甲烷、1,1-二氯乙烷、1,2-二氯乙烷、四氯化碳、氯乙烯,污染分别以西部车间、中部车间、北部化工库、东部办公室、中部车间与东部仓库之间位置为中心向四周展开运移,污染物含量整体上先随深度增加逐渐升高至峰值,后随深度增加而大幅降低,含量峰值主要积聚于陆相层粉质黏土(4)_(2)层的中部及底部,以及海相层粉质黏土(6)_(1)层或粉土(6)_(3)层的上部,表明粉质黏土(4)_(2)层与粉质黏土(6)_(1)层在一定程度上有效阻滞了污染运移,这与其黏粒粉粒含量高、砂粒含量低和渗透性差等特性有关。Based on the study of the spatial distribution and genetic research of chlorinated hydrocarbon pollutants in the quaternary of marine and continental interdeposition in Tianjin,this paper selected a pollution site,a pesticide raw material purification workshop with a production history of 19 years,and investigated the spatial distribution of chlorinated hydrocarbon pollution and the cause of pollution in site soil through geological survey,monitoring sampling,and test analysis.Results showed that:the over-standard chlorinated hydrocarbons in the site include chloroform,1,1-dichloroethane,1,2-dichloroethane,carbon tetrachloride and vinyl chloride;the pollution spread around the core area consisted of the workshop in the west and middle of the site,the chemical warehouse in the north,the office in the east,and the area between the workshop in the middle and the warehouse in the east;the pollutant content first increased to the peak with the increase of depth on the whole,and then decreased significantly with the increase of depth.The peak content mainly accumulated in the middle and bottom of silty clay(4)_(2) layer of continental layer and the upper part of silty clay(6)_(1) layer or silty soil(6)_(3) layer of marine layer.It showed that silty clay layer(4)_(2) and silty clay layer(6)_(1) effectively blocked the pollution migration to a certain extent,which was related to the characteristics of high clay and silt content,low sand content and poor permeability.

关 键 词：污染场地 土壤 氯代烃类 空间分布 污染成因 

分 类 号：X53[环境科学与工程—环境工程]