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Article

PM2.5 Magnetic Properties in Relation to Urban Combustion Sources in Southern West Africa

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Géosciences Environnement Toulouse, Université de Toulouse, CNES, CNRS, IRD, UPS, 31400 Toulouse, France
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Laboratoire d’Aérologie, Université Paul Sabatier-Toulouse 3, CNRS, 31400 Toulouse, France
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Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, São Paulo 05508-090, Brazil
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Centre De Microcaractérisation Raimond Castaing, 31400 Toulouse, France
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Laboratoire de Physique du Rayonnement, Université d’Abomey Calavi, Cotonou 01 BP 526, Benin
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Laboratoire de Physique de l’Atmosphère, Université Félix-Houphouët-Boigny, Abidjan 01 BPV 34, Ivory Coast
*
Author to whom correspondence should be addressed.
Academic Editor: Arantxa Revuelta
Atmosphere 2021, 12(4), 496; https://doi.org/10.3390/atmos12040496
Received: 25 March 2021 / Revised: 9 April 2021 / Accepted: 12 April 2021 / Published: 14 April 2021
(This article belongs to the Special Issue Environmental Magnetism Applied to the Study of Atmospheric Aerosols)
The physico-chemical characteristics of particulate matter (PM) in African cities remain poorly known due to scarcity of observation networks. Magnetic parameters of PM are robust proxies for the emissions of Fe-bearing particles. This study reports the first magnetic investigation of PM2.5 (PM with aerodynamic size below 2.5 μm) in Africa performed on weekly PM2.5 filters collected in Abidjan (Ivory Coast) and Cotonou (Benin) between 2015 and 2017. The magnetic mineralogy is dominated by magnetite-like low coercivity minerals. Mass normalized SIRM are 1.65 × 10−2 A m2 kg−1 and 2.28 × 10−2 A m2 kg−1 for Abidjan and Cotonou respectively. Hard coercivity material (S-ratio = 0.96 and MDF = 33 mT) is observed during the dry dusty season. Wood burning emits less iron oxides by PM2.5 mass when compared to traffic sources. PM2.5 magnetic granulometry has a narrow range regardless of the site or season. The excellent correlation between the site-averaged element carbon concentrations and SIRM suggests that PM2.5 magnetic parameters are linked to primary particulate emission from combustion sources. View Full-Text
Keywords: environmental magnetism; air pollution; PM composition environmental magnetism; air pollution; PM composition
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MDPI and ACS Style

Leite, A.d.S.; Léon, J.-F.; Macouin, M.; Rousse, S.; Trindade, R.I.F.d.; Proietti, A.; Drigo, L.; Antonio, P.Y.J.; Akpo, A.B.; Yoboué, V.; Liousse, C. PM2.5 Magnetic Properties in Relation to Urban Combustion Sources in Southern West Africa. Atmosphere 2021, 12, 496. https://doi.org/10.3390/atmos12040496

AMA Style

Leite AdS, Léon J-F, Macouin M, Rousse S, Trindade RIFd, Proietti A, Drigo L, Antonio PYJ, Akpo AB, Yoboué V, Liousse C. PM2.5 Magnetic Properties in Relation to Urban Combustion Sources in Southern West Africa. Atmosphere. 2021; 12(4):496. https://doi.org/10.3390/atmos12040496

Chicago/Turabian Style

Leite, Aruã d.S., Jean-François Léon, Melina Macouin, Sonia Rousse, Ricardo I.F.d. Trindade, Arnaud Proietti, Loïc Drigo, Paul Y.J. Antonio, Aristide B. Akpo, Véronique Yoboué, and Cathy Liousse. 2021. "PM2.5 Magnetic Properties in Relation to Urban Combustion Sources in Southern West Africa" Atmosphere 12, no. 4: 496. https://doi.org/10.3390/atmos12040496

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