某焦化厂改建用地土壤中PAHs污染及其风险评价  

Pollution and Risk Assessment of PAHs in Soils from a Reconstructed Land of a Coking Plant

作　　者：阴丽琴 曹巍 王营营 豆俊峰 朱宜 YIN Liqin;CAO Wei;WANG Yingying;DOU Junfeng;ZHU Yi(Engineering Research Center of Groundwater Pollution Control and Remediation of Ministry of Education,College of Water Science,Beijing Normal University,Beijing 100875,China)

机构地区：[1]北京师范大学水科学研究院地下水污染控制与修复教育部工程研究中心

出　　处：《环境科学与技术》2019年第8期209-216,共8页Environmental Science & Technology

基　　金：国家自然科学基金面上项目(51579010);青年科学基金项目(41807406)

摘　　要：对北京市朝阳区某焦化厂改建用地土壤中16种USEPA优控多环芳烃的污染状况进行分析,并评估其可能造成的污染风险。结果表明:改建用地表层土壤中16种多环芳烃总含量范围为314.65~1 000.09μg/kg,平均值为578.34μg/kg,主要以3环和4环组分为主,特征比值法分析显示其污染主要与石油燃烧及煤和生物质的燃烧相关。基于内梅罗综合污染指数法与毒性当量因子法等评估其生态风险,该区域单种PAHs存在超标现象且其综合污染状况对生态环境存在潜在的危害。此外,对多环芳烃暴露人群分别进行致癌及非致癌健康风险评价,该区域不会对成人及儿童造成明显的非致癌危害且其平均值的致癌风险均可以接受,但最大值的致癌风险超过可接受值,经口摄入及皮肤接触的贡献较大,需要引起重视。The pollution status was analyzed and the possible pollution risks were evaluated in soils from a reconstructed land of a coking plant in Chaoyang District, Beijing. The results showed that the concentrations of total 16 PAHs in the surface soil of the reconstructed land ranged from 314.65 to 1 000.09μg/kg with an average of 578.34μg/kg, and this region was dominated by PAHs with 3 and 4 rings. The diagnostic ratios showed that the region was mainly contaminated by the combustion of petroleum, coal or biomass. The ecological risk was evaluated based on the Nemerow comprehensive pollution index and the toxic equivalent factors, indicating that the single PAHs in this region were beyond the standard and their comprehensive pollution had potential harm to the ecological environment. In addition, the carcinogenic and non-carcinogenic health risk assessment for populations exposed to PAHs was carried out, showing that this region can not cause significant non-carcinogenic hazards to adults and children, and the average cancer risk was acceptable, but the maximum carcinogenicity risk exceeded the acceptable value, and the contribution from ingestion and dermal contact was significant which should be taken seriously.

关 键 词：多环芳烃 风险评价 土壤污染 焦化厂 改建用地 

分 类 号：X53[环境科学与工程—环境工程]