苯系物分布特征思考——上海某化工仓储场地为例  

Thoughts on Distribution Characteristics of BTEX-Example of Some Chemical Storage Contaminated Site in Shanghai

作　　者：李灿 方楠 LI Can;FANG Nan(Shanghai Academy of Environmental Sciences)

机构地区：[1]上海市环境科学研究院

出　　处：《上海节能》2022年第7期821-826,共6页Shanghai Energy Saving

摘　　要：为推动土地流转,对某化工仓储开展场地调查工作。布设103个土壤监测点和99个地下水监测点,在超标污染点位设置不同深度地下水丛式井,对土壤和地下水苯系物进行采样分析。发现场地苯系物污染严重,尤其是苯和氯苯,地下水中苯和氯苯最大检出浓度分别为892000、1040000μg/L;土壤和地下水苯系物污染具有一致性,在地下水中更易于迁移、扩散;土壤苯系物垂向迁移与自身密度、土壤渗透系数有关。苯类轻质非水相液体易集中在上层土壤;氯苯类重质非水相液体垂向迁移深,在渗透性差的淤泥质黏土层甚至暗绿色粉质黏土层截留。In order to transfer the land,environmental site investigation was carried out at a chemical storage site and 103 soil monitoring positions and 99 groundwater monitoring wells were established.In addition,groundwater cluster wells of different depths were set up at the pollution point.All soil samples and groundwater samples were determined.The results showed that the pollution of benzene series(BTEX)was serious,especially benzene and chlorobenzene.The maximum detected concentrations of benzene and chlorobenzene in groundwater were 892000μg·L^(-1) and 1040000μg·L^(-1),respectively.The distribution of BTEX in groundwa-ter and soil is consistent,and it is easier to migrate and diffuse in groundwater.The vertical migration of soil benzene series is related to its own density and soil permeability coefficient.Benzene-based light non-aque-ous liquids tend to concentrate in the upper soil.Chlorobenzene-based dense non-aqueous liquids migrated deeper and were intercepted in the poorly permeable silty clay layer or even the dark green silty clay layer.

关 键 词：苯系物 污染场地 场地调查 空间分布 垂向迁移 

分 类 号：X78[环境科学与工程—环境工程] TQ077[化学工程]