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首页> 外文期刊>Atmospheric chemistry and physics >High-resolution sampling and analysis of ambient particulate matter in the Pearl River Delta region of southern China: source apportionment and health risk implications
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High-resolution sampling and analysis of ambient particulate matter in the Pearl River Delta region of southern China: source apportionment and health risk implications

机译：中国南方珠江三角洲地区环境颗粒物的高分辨率采样和分析：污染源分配和健康风险

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Hazardous air pollutants, such as trace elements in particulate matter (PM), are known or highly suspected to cause detrimental effects on human health. To understand the sources and associated risks of PM to human health, hourly time-integrated major trace elements in size-segregated coarse (PMsub2.5–10/sub) and fine (PMsub2.5/sub) particulate matter were collected at the industrial city of Foshan in the Pearl River Delta region, China. Receptor modeling of the data set by positive matrix factorization (PMF) was used to identify six sources contributing to PMsub2.5/sub and PMsub10/sub concentrations at the site. Dominant sources included industrial coal combustion, secondary inorganic aerosol, motor vehicles and construction dust along with two intermittent sources (biomass combustion and marine aerosol). The biomass combustion source was found to be a significant contributor to peak PMsub2.5/sub episodes along with motor vehicles and industrial coal combustion. Conditional probability function (CPF) analysis was applied to estimate the source locations using the PMF-resolved source contribution coupled with the surface wind direction data. Health exposure risk of hazardous trace elements (Pb, As, Si, Cr, Mn and Ni) and source-specific values were estimated. The total hazard quotient (HQ) of PMsub2.5/sub was 2.09, higher than the acceptable limit (HQ?=?1). The total carcinogenic risk (CR) was 3.37?×?10sup?3/sup for PMsub2.5/sub, which was 3 times higher than the least stringent limit (1.0?×?10sup?4/sup). Among the selected trace elements, As and Pb posed the highest non-carcinogenic and carcinogenic risks to human health, respectively. In addition, our results show that the industrial coal combustion source is the dominant non-carcinogenic and carcinogenic risk contributor, highlighting the need for stringent control of this source. This study provides new insight for policy makers to prioritize sources in air quality management and health risk reduction.
机译：已知或高度怀疑有害空气污染物，例如微粒物质（PM）中的微量元素，会对人体健康造成不利影响。要了解PM的来源及其对人类健康的相关风险，请按时间进行时间积分，以小时为单位，分别以粒度分离的粗粒（PM 2.5-10 ）和细粒（PM 2.5 ）颗粒物收集在中国珠江三角洲的佛山市。通过正矩阵分解（PMF）对数据集进行受体建模，以识别造成该地点PM 2.5 和PM 10 浓度的六个来源。主要来源包括工业燃煤，二次无机气溶胶，机动车和建筑粉尘以及两个间歇性源（生物质燃烧和海洋气溶胶）。发现生物质燃烧源与机动车和工业燃煤一起是峰值PM 2.5 事件的重要贡献者。应用条件概率函数（CPF）分析，使用PMF解析的源贡献与地表风向数据一起估算源位置。估计了有害痕量元素（铅，砷，硅，铬，锰和镍）的健康暴露风险和特定于源的值。 PM 2.5 的总危险商（HQ）为2.09，高于可接受的限值（HQ？=？1）。 PM 2.5 的总致癌风险（CR）为3.37？×？10 ？3 ，是最低严格限值（1.0？×？10 < sup>？4 ）。在选定的微量元素中，砷和铅分别对人类健康构成最高的非致癌和致癌风险。此外，我们的结果表明，工业燃煤来源是主要的非致癌和致癌风险来源，这突出说明了对此来源进行严格控制的必要性。这项研究为决策者确定空气质量管理和减少健康风险的来源提供了新的见解。

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