Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 139.7km, 2695-066 Bobadela LRS, Portugal.
Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 139.7km, 2695-066 Bobadela LRS, Portugal.
Sci Total Environ. 2015 Jul 15;521-522:411-20. doi: 10.1016/j.scitotenv.2015.03.112. Epub 2015 Apr 7.
The objective of this work was to provide a chemical characterization of atmospheric particles collected in the vicinity of a steelmaking industry and to identify the sources that affect PM10 levels. A total of 94 PM samples were collected in two sampling campaigns that occurred in February and June/July of 2011. PM2.5 and PM2.5-10 were analyzed for a total of 22 elements by Instrumental Neutron Activation Analysis and Particle Induced X-ray Emission. The concentrations of water soluble ions in PM10 were measured by Ion Chromatography and Indophenol-Blue Spectrophotometry. Positive Matrix Factorization receptor model was used to identify sources of particulate matter and to determine their mass contribution to PM10. Seven main groups of sources were identified: marine aerosol identified by Na and Cl (22%), steelmaking and sinter plant represented by As, Cr, Cu, Fe, Ni, Mn, Pb, Sb and Zn (11%), sinter plant stack identified by NH4(+), K and Pb (12%), an unidentified Br source (1.8%), secondary aerosol from coke making and blast furnace (19%), fugitive emissions from the handling of raw material, sinter plant and vehicles dust resuspension identified by Al, Ca, La, Si, Ti and V (14%) and sinter plant and blast furnace associated essentially with Fe and Mn (21%).
本工作的目的是对炼钢工业附近采集的大气颗粒物进行化学特性分析，并识别影响 PM10 水平的污染源。在 2011 年 2 月和 6/7 月进行了两次采样活动，共采集了 94 个 PM 样本。采用中子活化分析和粒子感生 X 射线发射法对 PM2.5 和 PM2.5-10 中的 22 种元素进行了分析。采用离子色谱法和靛酚蓝分光光度法测量了 PM10 中水溶性离子的浓度。采用正矩阵因子化受体模型来识别颗粒物的来源，并确定它们对 PM10 的质量贡献。确定了七个主要的污染源组：由 Na 和 Cl 代表的海洋气溶胶（22%）、由 As、Cr、Cu、Fe、Ni、Mn、Pb、Sb 和 Zn 代表的炼钢和烧结厂（11%）、由 NH4(+)、K 和 Pb 代表的烧结厂烟囱（12%）、一个未识别的 Br 源（1.8%）、由焦炭制造和高炉引起的二次气溶胶（19%）、由原材料处理、烧结厂和车辆扬尘引起的无组织排放（14%）以及主要与 Fe 和 Mn 相关的烧结厂和高炉（21%）。
