Duarte Regina M B O, Matos João T V, Paula Andreia S, Lopes Sónia P, Ribeiro Sara, Santos José Francisco, Patinha Carla, da Silva Eduardo Ferreira, Soares Rosário, Duarte Armando C
Department of Chemistry, CICECO and CESAM, University of Aveiro, 3810-193, Aveiro, Portugal.
Department of Chemistry and CESAM, University of Aveiro, 3810-193, Aveiro, Portugal.
Environ Sci Pollut Res Int. 2017 Apr;24(12):11006-11016. doi: 10.1007/s11356-016-7793-8. Epub 2016 Oct 10.
In the framework of two national research projects (ORGANOSOL and CN-linkAIR), fine particulate matter (PM) was sampled for 17 months at an urban location in the Western European Coast. The PM samples were analyzed for organic carbon (OC), water-soluble organic carbon (WSOC), elemental carbon (EC), major water-soluble inorganic ions, mineralogical, and for the first time in this region, strontium isotope (Sr/Sr) composition. Organic matter dominates the identifiable urban PM mass, followed by secondary inorganic aerosols. The acquired data resulted also in a seasonal overview of the carbonaceous and inorganic aerosol composition, with an important contribution from primary biomass burning and secondary formation processes in colder and warmer periods, respectively. The fossil-related primary EC seems to be continually present throughout the sampling period. The Sr/Sr ratios were measured on both the labile and residual PM fractions as well as on the bulk PM samples. Regardless of the air mass origin, the residual fractions are more radiogenic (representative of a natural crustal dust source) than the labile fractions, whose Sr/Sr ratios are comparable to that of seawater. The Sr/Sr ratios and the mineralogical composition data further suggest that sea salt and mineral dust are important primary natural sources of fine aerosols throughout the sampling period.
在两个国家研究项目（ORGANOSOL和CN-linkAIR）的框架下，在西欧海岸的一个城市地点对细颗粒物（PM）进行了17个月的采样。对PM样本进行了有机碳（OC）、水溶性有机碳（WSOC）、元素碳（EC）、主要水溶性无机离子、矿物学分析，并且在该地区首次分析了锶同位素（Sr/Sr）组成。有机物在可识别的城市PM质量中占主导地位，其次是二次无机气溶胶。所获得的数据还得出了碳质和无机气溶胶组成的季节性概况，在较冷和较暖时期，分别有来自原生生物质燃烧和二次形成过程的重要贡献。与化石相关的原生EC在整个采样期间似乎持续存在。对不稳定和残留的PM组分以及整体PM样本都测量了Sr/Sr比率。无论气团来源如何，残留组分的放射性比不稳定组分更强（代表天然地壳尘埃源），不稳定组分的Sr/Sr比率与海水相当。Sr/Sr比率和矿物学组成数据进一步表明，在整个采样期间，海盐和矿物尘埃是细气溶胶的重要主要天然来源。
