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Ionic composition of PM2.5 at urban sites of northern Greece: secondary inorganic aerosol formation.

Authors
  • Voutsa, D
  • Samara, C
  • Manoli, E
  • Lazarou, D
  • Tzoumaka, P
Type
Published Article
Journal
Environmental Science and Pollution Research
Publisher
Springer Nature
Publication Date
Apr 01, 2014
Volume
21
Issue
7
Pages
4995–5006
Identifiers
DOI: 10.1007/s11356-013-2445-8
PMID: 24363054
Source
Medline
License
Unknown

Abstract

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.

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