摘要
用GC-MS方法测定了贵阳市主干道32个降尘样品中13种多环芳烃（PAHs）,并运用美国能源部和美国环保局的方法对其健康风险进行了评估。结果表明,贵阳市主干道降尘中PAHs的含量范围为1291～9215μg·kg-1,平均值为4006μg·kg-1,在国内外同类样品中处于中等水平。主成分分析结果表明,降尘中PAHs主要源于机动车尾气的排放和家庭燃煤的燃烧。健康风险评估结果显示,降尘中PAHs的非致癌危害和致癌风险主要由呼吸途径贡献。PAHs的综合非致癌危害指数远小于1,但综合致癌风险值是一般可接受致癌风险值的10倍以上,说明PAHs的致癌风险不容忽视,其中BaP和DBA对综合致癌风险的贡献最大,应引起关注。
Thirteen polycyclic aromatic hydrocarbons （PAHs） in 32 urban dust samples collected from the main roads of Guiyang City, Southwest China were measured using GC-MS method, and their health risks were assessed using the methods proposed by US Department of Energy and US EPA. The results showed that PAHs in urban dusts were in the range of 1291-9215μg·kg-1 （ mean ： 4006μg· kg-1 ） , which was modest at the global scale. These PAHs were mostly origi- nated from vehicle emission and domestic coal combustion based on the principal component anal- ysis. Health risk assessment suggested that the non-carcinogenic hazard and the cancer risks were mainly stemmed from the respiratory activities. The integrated non-carcinogenic hazard index was much less than one, while the integrated cancer risk was at least one magnitude higher than that of the acceptable cancer risk, indicating certain cancer risk cannot be avoided. Among the thir- teen PAHs, BaP and DBA contribute the most to the integrated cancer risk, which deserve more concerns.
出处
《生态学杂志》
CAS
CSCD
北大核心
2014年第10期2810-2816,共7页
Chinese Journal of Ecology
基金
国家自然科学基金面上项目(40973087和20977020)
中国科学院环境地球化学国家重点实验室科研专项(SKLEG2013601)
教育部211重点学科建设项目(211KST200902)资助
关键词
多环芳烃
道路灰尘
贵阳市
健康风险评价
polycyclic aromatic hydrocarbons
road dust
Guiyang
health risk assessment.
作者简介
张春辉，男，1988年生，硕士研究生。主要从事生物地球化学方面的研究。E—mail：zchh1988@163．com
通讯作者E-mail：guojianyang@vip．gyig．ac．cn
