Health risk assessment on PAHs contaminated site-a case study in a relocated coke and chemical plant in Beijing

摘要：

　　Taken polycyclic aromatic hydrocarbons (PAHs) in a relocated coke and chemical plant in Beijing for example,the procedures of contaminated site health risk assessment adopted in China were introduced,and potential risk control and mitigation alternatives were proposed.The hazard indentification results revealed that the surface soil was heavily polluted by fluorene,phenanthrene,anthracene,fluoranthene,pyrene,benzaanthracene,chrysene,benzob,kfluoranthene,benzoapyrene,indeno1,2,3-cdpyrene,dibenza,hanthracene,and benzog,h,iperylene throughout the site,and their maximum concentrations were all beyond the corresponding screening levels.But based on the exact exposure characteristics of the receptors in each sub-area,the risk assessment results indicated that only the cancer risk from benzaanthracene,benzob,kfluoranthene,benzoapyrene,indeno1,2,3-cdpyrene and dibenza,hanthracene were unacceptable,among which the cancer risk from benzoapyrene was the highest,up to 4.4× 10-5 in zone A,2.0× 10-4 in zone B and 4.0× 10-4 in zone C,which were proposed to be redeveloped as commercial zone,industrial site park,and comprehensive development zone,respectively.In addition,for all contaminants in the three sub-areas,oral ingestion and dermal contact were the two most important exposure pathways.According to the results,an active remediation alternative aiming at decontaminating the polluted soil,a soft strategy aiming at cutting off the exposure pathways and a strategy aiming at changing the exposure characteristic of the receptors through land function change were proposed as the management strategy for the site to mitigate and control the health risk.

关键词： discarded coke and chemical plant health risk assessment risk management strategy

作者: Maosheng Zhong Lin Jiang Xiaoyang Jia Jing Liang Tianxiang Xia Juejun Yao

作者单位: Beifing Municipal Research Institute of Environmental Protection, Beijing 100037, China;National Engineering Research Center of Urban Environmental Pollution Control, Beijing 100037, China;Beijing Key Laboratory for risk modeling and remediation of contaminated sites, Beijing 100037, China

会议类型: 国际会议

会议名称: 2013 International Symposium on Environmental Science and Technology(2013环境科学与技术国际会议)

会议地点: 大连

会议语种:英文

页码: 540-548

在线出版日期: 2013-06-04（万方平台首次上网日期，不代表论文的发表时间）