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首页> 外文期刊>The Science of the Total Environment >Spatial heterogeneity of personal exposure to airborne metals in French urban areas
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Spatial heterogeneity of personal exposure to airborne metals in French urban areas

机译：法国市区个人暴露于空气中的金属的空间异质性

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The spatial distribution of urban population exposures to ambient air particles was investigated as part of the Genotox'ER study conducted in four metropolitan areas (Grenoble, Paris, Rouen and Strasbourg) in France. In each city, 60 to 90 non-smoking adult and children volunteers were selected. Subjects lived in three different urban sectors: one highly exposed to traffic emissions, one influenced by local industrial sources, and a background urban environment. The Harvard Chempass multi-pollutant personal sampler was used to sample PM10 and PM2.5 particles during 48 h during two different seasons ('hot' and 'cold'). The elemental composition of the filters was analysed by Particle-Induced X-ray Emission (PIXE).rnSixteen elements were found to be over the method detection limits: Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn and Pb. The relative concentrations of elements of crustal origin (Si, Al, Ca) were higher in the coarse fraction of PM10 filters, while elements associated with combustion processes (traffic emissions or industrial combustion) presented higher relative concentrations in the PM2.5 fraction (S, Ni, V, Pb). Spatial heterogeneity of elemental exposures by urban sector is substantial for some metals of health concern, with 20% to 90% greater exposure values, on average, in the traffic proximity or industrial sectors, compared to the background sector, for Fe, Zn, Cu, V and Cr. This spatial heterogeneity should not be overlooked in epidemiological or risk assessment studies.
机译：Genotox'ER研究的一部分，在法国的四个大都市区（格勒诺布尔，巴黎，鲁昂和斯特拉斯堡）进行了研究，调查了城市人口暴露于环境空气颗粒的空间分布。在每个城市，选择了60至90名非吸烟的成年人和儿童志愿者。受试者生活在三个不同的城市地区：一个交通流量较高，一个受到当地工业来源的影响，以及背景城市环境。在两个不同季节（“炎热”和“寒冷”）的48小时内，使用了哈佛Chempass多污染物个人采样器对PM10和PM2.5颗粒进行采样。通过粒子诱导X射线发射（PIXE）分析了滤光片的元素组成。rn发现有16种元素超出了方法检测范围：Al，Si，P，S，Cl，K，Ca，Ti，V，铬，锰，铁，镍，铜，锌和铅在PM10过滤器的粗颗粒中，地壳元素（Si，Al，Ca）的相对浓度较高，而与燃烧过程（交通排放或工业燃烧）相关的元素在PM2.5组分（S中）的相对浓度较高。 ，Ni，V，Pb）。对于某些与健康有关的金属，城市部门元素暴露的空间异质性是相当大的，与背景部门相比，与背景部门相比，交通接近或工业部门的暴露值平均高出20％至90％ ，V和Cr。这种空间异质性在流行病学或风险评估研究中不应被忽视。

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