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Inorganic and carbonaceous components in indoor/outdoor particulate matter in two residential houses in Oslo, Norway

Lazaridis Michalis, Aleksandropoulou,V , Hanssen ,J.E , Eleftheriadis ,K, Katsivela, Eleftheria, 1961-, Frueherer Name

Πλήρης Εγγραφή

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Περίληψη

A detailed analysis of indoor/outdoor physicochemicalaerosol properties has been performed. Aerosol measurementswere taken at two dwellings, one in the city centerand the other in the suburbs of the Oslo metropolitanarea, during summer/fall and winter/spring periods of2002–2003. In this paper, emphasis is placed on thechemical characteristics (water-soluble ions and carbonaceouscomponents) of fine (PM2.5) and coarse (PM2.5–10)particles and their indoor/outdoor relationship. Resultsdemonstrate that the carbonaceous species were dominantin all fractions of the PM10 particles (cut off size:0.09–11.31 m) during all measurement periods, exceptwinter 2003, when increased concentrations of watersolubleinorganic ions were predominant because of seasalt transport. The concentration of organic carbon washigher in the fine and coarse PM10 fractions indoors,whereas elemental carbon was higher indoors only in thecoarse fraction. In regards to the carbonaceous species,local traffic and secondary organic aerosol formationwere, probably, the main sources outdoors, whereas indoorscombustion activities such as preparation of food,burning of candles, and cigarette smoking were the mainsources. In contrast, the concentrations of water-solubleinorganic ions were higher outdoors than indoors. The variability of water-soluble inorganic ion concentrationsoutdoors was related to changes in emissions from localanthropogenic sources, long-range transport of particles,sea salt emissions, and resuspension of roadside and soildusts. In the indoor environment the infiltration of theoutdoor air indoors was the major source of inorganicions.

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