摘要
为了解南昌市道路扬尘和土壤风沙尘PM_(2.5)中多环芳烃(PAHs)的来源和健康风险,利用颗粒物再悬浮系统采集PM_(2.5)样品,测定了PM_(2.5)中16种优先控制的多环芳烃的含量.结果表明,南昌市道路扬尘PM_(2.5)中ΣPAHs含量范围为48. 85～166. 16μg·kg^(-1),平均值为(114. 22±39. 95)μg·kg^(-1),土壤风沙尘PM_(2.5)中ΣPAHs含量范围为31. 05～62. 92μg·kg^(-1),平均值为(40. 79±9. 39)μg·kg^(-1).道路尘和土壤风沙尘PM_(2.5)中的PAHs都是以4～5环组分为主.主成分分析/多元线性回归分析结果表明,南昌市道路扬尘PM_(2.5)中PAHs的来源包括机动车的排放和燃煤源与石油泄漏,贡献率分别为51. 7%和48. 3%,总估计值与实际值的线性拟合有很好的一致性.对于儿童和成年男性,不同暴露途径的PAHs致癌风险值从大到小依次是皮肤接触>摄食>呼吸吸入,而成年女性则表现为摄食>皮肤接触>呼吸吸入.各暴露途径中,PAHs对成人的致癌风险均高于儿童.所有人群中,PAHs的总致癌风险值均低于美国EPA推荐的致癌风险阈值10^(-6),没有致癌风险.
In order to understand the sources and health risks of polycyclic aromatic hydrocarbons in the PM2.5 fraction of road dust and soil dust in Nanchang city, PM2.5 samples were collected by a resuspension sampler and the concentrations of sixteen polycyclic aromatic hydrocarbons (PAHs) were detected. The results showed that the ΣPAHs of the road dust ranged from 48.85 to 166.16 μg·kg-1, with a mean of (114.22±39.95)μg·kg-1. The ΣPAHs of the soil dust ranged from 31.05 to 62.92 μg·kg-1 with a mean of (40.79±9.39)μg·kg-1. The PAHs in the PM2.5 fraction of fugitive dust were mainly composed of 4-5 rings. The results of the principal component analysis and multiple linear regression analysis indicated that the PAHs in PM2.5 samples of road dust mainly originated from motor vehicle emissions, coal sources, and oil leakage, with contribution rates of 51.7% and 48.3%, respectively. For children and adult males, the carcinogenic risk values of PAHs in different exposure pathways followed the order dermal contact > ingestion > inhalation, while those for adult females followed the order ingestion > dermal contact > inhalation. For all exposure pathways, the carcinogenic risks of the PAHs to adults were higher than those to children. For all populations, the total carcinogenic risk values of the PAHs were lower than the US EPA recommended carcinogenic risk threshold of 10-6, indicating no carcinogenic risk.
作者
于瑞莲
郑权
刘贤荣
王珊珊
赵莉斯
胡恭任
YU Rui-lian;ZHENG Quan;LIU Xian-rong;WANG Shan-shan;ZHAO Li-si;HU Gong-ren(College of Chemical Engineering, Huaqiao University, Xiamen 361021,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2019年第4期1656-1663,共8页
Environmental Science
基金
国家自然科学基金项目(21477042
21377042)
福建省自然科学基金项目(2016J01065)
关键词
南昌市
扬尘PM2.5
多环芳烃
来源解析
健康风险评价
Nanchang City
PM2.5 fraction of fugitive dust
polycyclic aromatic hydrocarbons
sources analysis
health risk assessment
