典型有机化工污染地块DNAPL分布特征及健康风险评价  

Distribution Characteristics of DNAPL in Contaminated Plots ofTypical Organic Chemical Plants and Health Risk Assessment

作　　者：李晓曼 Li Xiaoman(State Environmental Protection Engineering Center for Urban Soil Contamination Control and Remediation,Shanghai Academy of Environmental Sciences,Shanghai 200233,China)

机构地区：[1]上海市环境科学研究院,国家环境保护城市土壤污染控制与修复工程技术中心,上海200233

出　　处：《皮革制作与环保科技》2024年第9期35-38,共4页Leather Manufacture and Environmental Technology

基　　金：上海市土壤污染状况调查、风险管控和修复全过程监管技术规程与管理制度研究(沪环科[2023]第7号)。

摘　　要：针对某典型有机化工污染地块土壤中6种DNAPL污染物的污染程度进行调查,研究DNAPL在土壤中的迁移转化及空间分布特征,采用健康风险评估模型结合克里金插值法分析了土壤中DNAPL污染物的健康风险。结果表明:土壤中主要污染物为1,2-二氯苯、1,4-二氯苯和氯苯,空间变异性强,离散程度高,表明受人为活动影响较大。DNAPL污染物垂直迁移性强,最大污染深度达15 m,浓度随深度增加呈先升高后降低的趋势,污染物主要集中在地块中部的生产车间和东部的废水处理站。健康风险评价结果表明,部分DNAPL污染物对潜在暴露人群的致癌和非致癌风险超过可接受范围,致癌风险整体上随土壤深度的增加而降低,非致癌风险随土壤深度的增加呈现先降低后升高的趋势。The pollution levels of six kinds of DNAPL pollutants in soil from a typical organic chemical pollution plot were investigated.The migration,transformation and spatial distribution characteristics of DNAPL in soil were studied.The health risk assessment model combined with Kriging interpolation method was used to analyze the health risk of DNAPL pollutants in soil.The results showed that the main pollutants in the soil were 1,2-dichlorobenzene,1,4-dichlorobenzene and chlorobenzene,which had strong spatial variability and high dispersion,indicating that the soil was greatly aff ected by human activities.DNAPL pollutants had strong vertical migration,with the maximum pollution depth of 15 m,and the concentration increased fi rst and then decreased with the increase of depth.The pollution plume was mainly concentrated in the production workshop in the middle of the plot and the waste water treatment station in the east.The health risk assessment results showed that the carcinogenic and non-carcinogenic risks of DNAPL pollutants to potentially exposed populations exceeded the acceptable range,the carcinogenic risk decreased with the increase of soil depth,and the non-carcinogenic risk showed a trend of decreasing fi rst and then increasing with the increase of soil depth.

关 键 词：土壤 DNAPL 污染特征 健康风险 

分 类 号：TS5[轻工技术与工程—皮革化学与工程]