贵阳市主干道降尘中的多环芳烃及其健康风险评估

生态学杂志

贵阳市主干道降尘中的多环芳烃及其健康风险评估

张春辉¹,郭建阳^2**,石顺权¹,张亮²,吴永贵^1,3,李江^1,3,杨少博¹

(¹贵州大学资源与环境工程学院，贵阳 550025； ²中国科学院地球化学研究所，环境地球化学国家重点实验室，贵阳 550002； ^3贵州大学应用生态研究所，贵阳 550025)

出版日期:2014-10-10 发布日期:2014-10-10

Polycyclic aromatic hydrocarbons and their health risk assessment in urban surface dust from main roads of Guiyang, Southwest China.

ZHANG Chun-hui¹, GUO Jian-yang^2**， SHI Shun-quan¹, ZHANG Liang², WU Yong-gui^1,3, LI Jiang^1,3, YANG Shao-bo¹

(¹College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China; ^2State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China; ^3Institute of Applied Ecology, Guizhou University, Guiyang 550025, China)
.

Online:2014-10-10 Published:2014-10-10

摘要/Abstract

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1291～9215 μg·kg^-1，平均值为4006 μg·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。

关键词: 滨岸生态系统, 土壤有机碳, C3/C4草本植物, 碳稳定同位素

Abstract:

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 1291-9215 μg·kg^-1 (mean: 4006 μg·kg^-1), which was modest at the global scale. These PAHs were mostly originated from vehicle emission and domestic coal combustion based on the principal component analysis. 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 thirteen PAHs, BaP and DBA contribute the most to the integrated cancer risk, which deserve more concerns.

Key words: riparian ecosystem, soil organic carbon (SOC), C3/C4 herbaceous plants, stable carbon isotope

张春辉1,郭建阳2**,石顺权1,张亮2,吴永贵1,3,李江1,3,杨少博1. 贵阳市主干道降尘中的多环芳烃及其健康风险评估[J]. 生态学杂志.

ZHANG Chun-hui1, GUO Jian-yang2**， SHI Shun-quan1, ZHANG Liang2, WU Yong-gui1,3, LI Jiang1,3, YANG Shao-bo1. Polycyclic aromatic hydrocarbons and their health risk assessment in urban surface dust from main roads of Guiyang, Southwest China.[J]. cje.

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