School of Chemistry and Materials Science, Guizhou Normal University, Guiyang, 550001, China.
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China.
Arch Environ Contam Toxicol. 2019 Jan;76(1):102-113. doi: 10.1007/s00244-018-0563-5. Epub 2018 Oct 5.
The polycyclic aromatic hydrocarbons (PAHs) bound to fine particulate matter (PM) can cause long-term adverse health consequences and are a public concern. A total of 144 PM-bound PAHs samples collected from Guiyang City, a typical plateau montane area in southwest China, from September 2012 to August 2013 were investigated to clarify their concentration, distribution, and potential sources. The health exposure risk also was evaluated. The samplers equipped with 90-mm glass fibre filters were operated at a flow rate of 100 L min for 24 h. The concentrations of the 16 PAHs (US EPA priority) were analysed by using ultra performance liquid chromatography equipped with photo diode array detector. Diagnostic ratios and back-trajectories were performed for the 16 PAHs sources apportionment. The results showed that the 16 PAHs ranged from 2.9 to 231 ng m with an annual average of 41 ± 21 ng m. The PAHs concentrations exhibited obvious seasonal variation, with higher levels in winter than in summer. Diagnostic ratios indicated that PAHs mainly originated from the combustion of coal and biomass, followed by the emission of vehicle exhaust. Cluster analyses on back-trajectories illustrated that approximately 34% of the air mass came from abroad, as far as Laos and Vietnam, in summer, whereas more than 90% of the air mass came from domestic sources in winter. The lifetime excess cancer risk from exposure to PAHs was 3.63 × 10, approximately 360 times higher than the health guideline (10) recommended by the US EPA, reflecting a high risk of cancer.
多环芳烃（PAHs）与细颗粒物（PM）结合会导致长期的不良健康后果，是公众关注的问题。本研究采集了 2012 年 9 月至 2013 年 8 月期间中国西南典型高原山区贵阳市的 144 个 PM 结合态多环芳烃样品，以阐明其浓度、分布和潜在来源。还评估了健康暴露风险。采样器配备 90mm 玻璃纤维过滤器，以 100Lmin 的流速运行 24h。使用配备光电二极管阵列检测器的超高效液相色谱法分析了 16 种 PAHs（美国环保署优先）的浓度。进行了 16 种 PAHs 源分配的诊断比和后轨迹分析。结果表明，16 种 PAHs 的浓度范围为 2.9 至 231ngm，年平均值为 41±21ngm。PAHs 浓度表现出明显的季节性变化，冬季浓度高于夏季。诊断比表明，PAHs 主要来源于煤和生物质的燃烧，其次是机动车尾气的排放。后轨迹聚类分析表明，夏季约 34%的气团来自国外，远至老挝和越南，而冬季 90%以上的气团来自国内。PAHs 暴露引起的终生超额癌症风险为 3.63×10，约为美国环保署建议的健康指导值（10）的 360 倍，反映出癌症风险较高。
