Partitioning of magnetic particles in PM10, PM2.5 and PM1 aerosols in the urban atmosphere of Barcelona (Spain)

Journal article


Aranzazu Revuelta, M., McIntosh, G., Pey, J., Perez, N., Querol, X. and Alastuey, A. 2014. Partitioning of magnetic particles in PM10, PM2.5 and PM1 aerosols in the urban atmosphere of Barcelona (Spain). Environmental Pollution. 188, pp. 109-117.
AuthorsAranzazu Revuelta, M., McIntosh, G., Pey, J., Perez, N., Querol, X. and Alastuey, A.
Abstract

A combined magnetic-chemical study of 15 daily, simultaneous PM10–PM2.5–PM1 urban background aerosol samples has been carried out. The magnetic properties are dominated by non-stoichiometric magnetite, with highest concentrations seen in PM10. Low temperature magnetic analyses showed that the superparamagnetic fraction is more abundant when coarse, multidomain particles are present, confirming that they may occur as an oxidized outer shell around coarser grains. A strong association of the magnetic parameters with a vehicular PM10 source has been identified. Strong correlations found with Cu and Sb suggests that this association is related to brake abrasion emissions rather than exhaust emissions. For PM1 the magnetic remanence parameters are more strongly associated with crustal sources. Two crustal sources are identified in PM1, one of which is of North African origin. The magnetic particles are related to this source and so may be used to distinguish North African dust from other sources in PM1.

KeywordsEnvironmental magnetism; Atmospheric aerosol; Source apportionment
Year2014
JournalEnvironmental Pollution
Journal citation188, pp. 109-117
PublisherElsevier
ISSN0269-7491
Digital Object Identifier (DOI)doi:10.1016/j.envpol.2014.01.025
Publication dates
PrintMay 2014
Publication process dates
Deposited05 Jan 2015
Accepted27 Jan 2014
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https://repository.canterbury.ac.uk/item/872zz/partitioning-of-magnetic-particles-in-pm10-pm2-5-and-pm1-aerosols-in-the-urban-atmosphere-of-barcelona-spain

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