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Indoor aerosol behaviour

This study examines the behavior of indoor aerosols, identifying crucial factors such as infiltration, deposition, and indoor sources that impact aerosol concentration. Measurements were conducted using sophisticated instruments including NanoSMPS, SMPS, and APS in family houses and office settings in Norway and Italy over specific periods. Findings indicate that indoor aerosol concentrations can vary significantly compared to outdoor levels. The research emphasizes the importance of modeling and monitoring indoor air quality for health implications, particularly regarding ultrafine and coarse particles.

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Indoor aerosol behaviour

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  1. Indoor aerosol behaviour Jiří Smolík1, Pavel Moravec1, Jaroslav Schwarz1, Vladimír Ždímal1, Elin Dahlin2, Yannis Drossinos3, Mita Lapi4 and Mihalis Lazaridis5 1Institute of Chemical Process Fundamentals AS CR, Praha, 2Norwegian Institute for Air Research (NILU), Kjeller, 3European Commission Joint Research Centre, Ispra, 4Fondazione Lombardia per l'Ambiente, Milan, 5Technical University of Crete, Chania

  2. Balance model

  3. Instruments • NanoSMPS: 3 nm - 1 m • DMA2 (EC 3085) + UCPC (3025), TSI • SMPS: 7 nm - 1 m • DMA1 (EC 3071A) + CPC (3022A), TSI • APS: 0,7 m – 20 m (0,5 m - 20 m) • model 3320 (3321), TSI

  4. DMA1 DMA2 APS AC/DC CPC UCPC PC1 PC2 PC3 PC4 Set-up T,P RH In Out T,P RH

  5. Deposition rate

  6. Norway Family house, Steinborgveien, Oslo 3.-14.6.2002

  7. Italy Office of the Fondazione Lombardia per l’Ambiente Milan centre 8.-23.10.2002

  8. Conclusions • Indoor aerosol concentration depends on • infiltration • deposition • indoor sources • Compared to outdoor aerosol concentrations the indoor concentrations can be • higher • lower

  9. Conclusions - continuation • Rate of deposition on internal surfaces is • higher for ultrafine and coarse particles • lower for the accumulation mode • Model assuming the ideal mixing in the room describes well the behaviour of the indoor aerosol

  10. Acknowledgement Project is supported by the grant EVK4-CT-2000-00018

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