Magnetic characterization of PM10 using non-linear Preisach maps. Toward domain state identification of magnetic anthropogenic particles
- 1University of Bucharest, Faculty of Physics, Atomistilor 405, 077125 Bucharest- Magurele, Romania, (adriana.dumitru1@gmail.com)
- 2National Institute for Laser, Plasma and Radiation Physics, Atoms Street 409, Măgurele, 077125, Romania, (marius.dumitru@inflpr.ro)
- 3University of Bucharest, Faculty of Chemistry, Dept. of Analytical Chemistry and Physical Chemistry, Regina Elisabeta 4-12, 030018 Bucharest, Romania, (gabriela.iorga@g.unibuc.ro)
According to World Health Organization, nowadays almost the entire global population (99%) breathes air that threatens its health (WHO, 2022), The greatest concern is related to air pollution by particles and nitrogen dioxide, people living in cities facing every day’s unhealthy levels of these pollutants. Due to their multitude of sources, natural (mineral dust, sea salt, volcanoes, etc.) and anthropogenic (traffic, industry, constructions, agricultural activities, etc.), atmospheric particulate matter (PM) levels and physical properties vary greatly in time and space. Here we investigate the magnetic properties of PM10 (PM less than 10 µm) sampled in three different locations from Romania chosen so as to reflect as much as possible different origin of atmospheric particles. We use non-linear Preisach maps in tandem with Scanning Electron Microscopy (SEM) coupled with Energy-Dispersive X-ray spectroscopy (EDS), SEM/EDS, to specify more precisely domain states and characteristic magnetic signature of magnetic grains in PM10 fraction. PM10 aerosol samples were collected at three different sites in southern Romania: Bucharest site as urban, heavy impacted by traffic in the very center of the city, Magurele as suburban, under the influence of Bucharest and of the agricultural activities in the surrounding areas and Matasari, a rural site located in south-western Romania that was heavily impacted by the industrial activities at the open-pit coal mines located in the proximity. Our study highlighted three main types of magnetic mineral pollutants in the PM10 samples from Romanian industrial, urban traffic and suburban environments.
Acknowledgment
AD and GI gratefully acknowledge the funding from the NO Grants 2014-2021, under Project contract no. 31/2020, EEA-RO-NO-2019-0423 project. This work was also supported by a grant of Ministry of Research, Innovation and Digitization, CCCDI - UEFISCDI, project number PN-III-P2-2.1-PED-2021-3678, within PNCDI III
How to cite: Dumitru, A., Necula, C., Dumitru, M., and Iorga, G.: Magnetic characterization of PM10 using non-linear Preisach maps. Toward domain state identification of magnetic anthropogenic particles, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-8892, https://doi.org/10.5194/egusphere-egu23-8892, 2023.
