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Chemical Composition of Fine Particulate Matter in January/February 2006

Analysis of SO4, NO3, Cl, Na, NH4, K, Mg, Ca in PM10 from urban and rural areas in Switzerland. Comparison with Poland, highlighting secondary aerosol dominance and reduction strategies.

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Chemical Composition of Fine Particulate Matter in January/February 2006

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  1. Chemical Composition of Fine Particulate Matter during January/February 2006 Robert Gehrig Empa, Air Pollution / Environmental Technology CH-8600 Dübendorf

  2. Analysis Programme SO4, NO3, Cl, Na, NH4, K, Mg, Ca IC from aqueous exctracts EC, OM (= OC x 1.8) VDI Basisverfahren (LUBW, Karlsruhe) not analysed (n.a.) trace elements, non water soluble parts, water

  3. PM10 Basel (urban background) Zürich (urban background) Tänikon (rural) Payerne (rural)

  4. Basel all „low days“ Phase A Phase B

  5. Payerne all „low days“ Phase A Phase B

  6. Bern alle Zwischenphasen Phase A Phase B

  7. Basel Bern Mean composition of PM10 Jan 06 – Feb 06 Zürich

  8. Basel Bern Mean composition of PM10 Dez 98 – Feb 99 (Ch. Hüglin NFP41) Zürich

  9. Basel Bern Payerne

  10. NOx; Comparison Poland - Switzerland

  11. SO2; Comparison Poland - Switzerland

  12. SO4/NO3-ratios Jan/Feb/Dec 2003 Rigi (CH) 0.41 Snieka (PL) 2.48 SO4/NO3-ratios Jan/Feb 2006 Basel 0.50 Payerne 0.41 Tänikon 0.39 Zürich 0.44

  13. Summary • Approx. 50% of PM10 was secondary inorganic aerosol • (somewhat less at kerbside sites) • Secondary aerosols dominate PM10 • SO4 /NO3 typically 0.4 - 0.5 • No indication of important LRTP from north-east • However, homogeneous mixing on regional scale • Efficient reduction scenarios need to include gaseous • precursors

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