CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi'an, Shaanxi, 710075, China.
CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi'an, Shaanxi, 710075, China.
Ecotoxicol Environ Saf. 2020 May;194:110442. doi: 10.1016/j.ecoenv.2020.110442. Epub 2020 Mar 11.
In recent decades, indoor air quality (IAQ) has become one of the most important human health issues. The potential properties and potential health hazards of polycyclic aromatic hydrocarbons (PAHs) are associated with their long-term residues, bioaccumulation and semivolatility, and they can also be transferred through a variety of media, such as the atmosphere, water and soil. Dust particles from indoor and outdoor emission sources adhere to A-C filters and can represent air quality to a certain extent. However, few studies have focused on PAHs in A-C filter dust in Hefei, China. In this study, 16 PAHs were selected, dust samples were collected from A-C filters from three different functional districts, and GC-MS analysis of the samples was performed. The concentration of the ∑16PAHs ranged from 7.34 to 326.84 μg g, 5.07-15.34 μg g, 4.09-47.26 μg g and 0.97-13.38 μg g in dust samples from the Administrative District (AD), Industrial District (ID), Commercial District (CD) and Outdoors (OD), respectively. The total PAH concentration in A-C dust was much higher than that in dust deposited outdoors in the urban area. The percentage of 5-6 ring PAHs accounted for more than 70% of the ∑16PAHs, which shows that the PAHs in A-C dust mainly come from pyrolysis rather than a diagenetic source. Principal component analysis (PCA) and diagnostic ratios were used in a source analysis, and the results indicated that the main PAHs emission sources in the different functional districts were coal, wood and biomass combustion. The incremental lifetime cancer risk (ILCR) values indicated a medium to high potential carcinogenic risk for adults and children exposed to dust with PAHs. Particularly, skin contact and ingestion of carcinogenic PAHs from dust are the major exposure pathways and present an exposure risk that is four to five orders of magnitude higher than the risk of inhalation.
在最近几十年，室内空气质量（IAQ）已成为最重要的人类健康问题之一。多环芳烃（PAHs）的潜在特性和潜在健康危害与其长期残留、生物累积和半挥发性有关，它们也可以通过多种介质转移，如大气、水和土壤。来自室内和室外排放源的灰尘颗粒附着在 A-C 过滤器上，可以在一定程度上代表空气质量。然而，在中国合肥，很少有研究关注 A-C 过滤器灰尘中的 PAHs。在这项研究中，选择了 16 种 PAHs，从三个不同功能区的 A-C 过滤器中采集灰尘样本，并对样本进行 GC-MS 分析。行政区域（AD）、工业区域（ID）、商业区域（CD）和室外（OD）灰尘样本中∑16PAHs 的浓度分别为 7.34-326.84μg/g、5.07-15.34μg/g、4.09-47.26μg/g和 0.97-13.38μg/g。A-C 灰尘中的总 PAH 浓度远高于市区室外沉积灰尘中的总 PAH 浓度。5-6 环 PAHs 的百分比占∑16PAHs 的 70%以上，这表明 A-C 灰尘中的 PAHs 主要来自热解而不是成岩源。主成分分析（PCA）和诊断比用于源分析，结果表明不同功能区的主要 PAHs 排放源是煤、木材和生物质燃烧。增量终生癌症风险（ILCR）值表明，成人和儿童接触含 PAHs 的灰尘存在中等到高潜在致癌风险。特别是，皮肤接触和摄入致癌 PAHs 是主要的暴露途径，暴露风险比吸入风险高出四到五个数量级。
