期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 21, 期 7, 页码 4995-5006出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-013-2445-8
关键词
Ammonium nitrate; Chloride depletion; Marine aerosol; Neutralization; PM2.5; SIA; Urban aerosol; NOR; SOR
资金
- European Community (LIFE+Environment Policy and Governance)
This study investigates the water-soluble ionic constituents (Na+, K+, NH4 (+), Ca2+, Mg2+, 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.
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