希腊北部城市地区 PM2.5 的离子组成：二次无机气溶胶的形成。
Ionic composition of PM2.5 at urban sites of northern Greece: secondary inorganic aerosol formation.
机构信息
Environmental Pollution Control Laboratory, Department of Chemistry, Aristotle University of Thessaloniki, University Campus, 54 124, Thessaloniki, Greece,
出版信息
Environ Sci Pollut Res Int. 2014 Apr;21(7):4995-5006. doi: 10.1007/s11356-013-2445-8. Epub 2013 Dec 22.
This study investigates the water-soluble ionic constituents (Na(+), K(+), NH4 (+), Ca(2+), Mg(2+), Cl(-), NO3 (-), SO4 (2-)) associated to PM2.5 particle fraction at two urban sites in the city of Thessaloniki, northern Greece, an urban traffic site (UT) and urban background site (UB). Ionic constituents represent a significant fraction of PM2.5 mass (29.6 at UT and 41.5 % at UB). The contribution of marine aerosol was low (<1.5 %). Secondary inorganic aerosols (SIA) represent a significant fraction of PM2.5 mass contributing to 26.9 ± 12.4 % and 39.2 ± 13.2 % at UT and UB sites, respectively. Nitrate and sulfate are fully neutralized by ammonium under the existing conditions. The ionic constituents were evaluated in relation to their spatial and temporal variation, their gaseous precursors, meteorological conditions, local and long-range transport.
本研究调查了与希腊北部塞萨洛尼基市两个城市站点（城市交通站点（UT）和城市背景站点（UB））的 PM2.5 颗粒部分相关的水溶性离子成分（Na(+)、K(+)、NH4 (+)、Ca(2+)、Mg(2+)、Cl(-)、NO3 (-)、SO4 (2-)）。离子成分占 PM2.5 质量的重要部分（UT 处为 29.6%，UB 处为 41.5%）。海洋气溶胶的贡献较低（<1.5%）。二次无机气溶胶（SIA）占 PM2.5 质量的重要部分，分别为 UT 和 UB 站点的 26.9 ± 12.4%和 39.2 ± 13.2%。在现有条件下，硝酸盐和硫酸盐完全被氨中和。评估了离子成分的时空变化、气态前体物、气象条件、本地和远程传输与它们的关系。
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