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Title

Origin of inorganic and organic components of PM2.5 in subway stations of Barcelona, Spain

AuthorsMartins, Vânia ; Moreno, Teresa ; Minguillón, María Cruz ; Van Drooge, Barend L. ; Reche, Cristina ; Amato, Fulvio ; de Miguel, Eladio; Capdevila, Marta; Centelles, Sonia; Querol, Xavier
KeywordsAir quality
Subways
Chemical composition
Fe
Indoor air quality
PMF
PM2.5
Issue DateJan-2016
PublisherElsevier
CitationEnvironmental Pollution 208: 125-136 (2016)
AbstractThe present work assesses indoor air quality in stations of the Barcelona subway system. PM2.5 concentrations on the platforms of 4 subway stations were measured during two different seasons and the chemical composition was determined. A Positive Matrix Factorization analysis was performed to identify and quantify the contributions of major PM2.5 sources in the subway stations. Mean PM2.5 concentrations varied according to the stations design and seasonal periods. PM2.5 was composed of haematite, carbonaceous aerosol, crustal matter, secondary inorganic compounds, trace elements, insoluble sulphate and halite. Organic compounds such as PAHs, nicotine, levoglucosan and aromatic musk compounds were also identified. Subway PM2.5 source comprised emissions from rails, wheels, catenaries, brake pads and pantographs. The subway source showed different chemical profiles for each station, but was always dominated by Fe. Control actions on the source are important for the achievement of better air quality in the subway environment. © 2015 The Authors.
Publisher version (URL)https://doi.org/10.1016/j.envpol.2015.07.004Get
URIhttp://hdl.handle.net/10261/185880
DOIhttp://dx.doi.org/10.1016/j.envpol.2015.07.004
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