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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 2:30 |
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Conference: Bucharest University Faculty of Physics 2023 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Assessment of air pollution by aerosols over a coal open-mine influenced region in southwestern Romania
Authors:
Adriana Dumitru (1), Alina Olaru (2), Marius Dumitru (3), Gabriela Iorga (1,4)
*
Affiliation:
1) University of Bucharest, Faculty of Physics, Atomistilor 405, Magurele, 077125 Bucharest, Romania
2) University of Bucharest, Faculty of Biology, Splaiul Independence 91-95, Bucharest 050095, Romania
3) National Institute for Laser, Plasma and Radiation Physics, Atoms Street 409, MÄgurele, 077125, Romania
4) University of Bucharest, Faculty of Chemistry, Bd. Regina Elisabeta 4-12, 030018, Bucharest, Romania
E-mail
gabriela.iorga@g.unibuc.ro
Keywords:
air quality, PM10, PM2.5, PM1, TC, coal, opencast mining
Abstract:
Mining activity in open-pit coal sites exerts a high pressure over the surrounding environment and on the health of people working and living nearby, as higher levels of particulate matter could increase their risk to develop various diseases. The aim of this study was to capture the level of exploitation activities in the residential area close to the coal open-mine in terms of mass concentrations and total carbon fractions (TC) of ambient PM10, PM2.5 and PM1 samples. Two sampling campaigns during 10 successive days (5-14 April 2018) and during 5 successive days (12-16 January 2019) covered both working (full time, part-time and non-working days) at the coal exploitation. Additional campaigns in summer and autumn of 2019, in winter 2019-2020, and in spring of 2020 were performed to capture the seasonal variations of different fractions of PM and of TC component. Fine fraction was also analyzed based on the aerosol Angstrom exponent, determined from measurements of the aerosol scattering coefficient at 450 nm, 550 nm and 700 nm by a nephelometer which operated at 1-min resolution. The mass concentrations of PM and TC showed significant variations from full time working days to non-working days. Insights into the morphology of particles and elemental composition were obtained by scanning electron microscopy (SEM) and energy dispersive x-ray (EDX/EDS) analysis. Major elements that were identified C, O, Si, Ca, K, S, Cu, Ni, Fe, Mg, Ti have both crustal and anthropogenic origin, in various proportions.
Acknowledgement:
AD and GI thanks the support from the Norway Grants 2014-2021, under Project contract no. 31/01.09.2020, project code EEA-RO-NO-2019-0423.
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