1. Integrated Magnetic Analyses for the Discrimination of Urban and Industrial Dusts
- Author
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Beata Górka-Kostrubiec, Katarzyna Dudzisz, Sylwia Dytłow, Małgorzata Wawer, Aldo Winkler, and Tadeusz Magiera
- Subjects
lcsh:QE351-399.2 ,Materials science ,magnetite ,010504 meteorology & atmospheric sciences ,Geography & travel ,street dust ,isothermal remanent magnetization acquisition curve ,010501 environmental sciences ,01 natural sciences ,hematite ,chemistry.chemical_compound ,domain structure ,0105 earth and related environmental sciences ,Magnetite ,ddc:910 ,particulate matter ,lcsh:Mineralogy ,technogenic magnetic particles ,Metallurgy ,Geology ,Thermomagnetic convection ,Hematite ,Geotechnical Engineering and Engineering Geology ,Magnetic susceptibility ,Grain size ,chemistry ,Remanence ,visual_art ,visual_art.visual_art_medium ,Magnetic nanoparticles ,first-order reversal curve ,Superparamagnetism - Abstract
Industrial and urban dusts were characterized by investigating their magnetic properties. Topsoil composed of technogenic magnetic particles (TMP) originating from areas affected by three ironworks, street dust mainly composed of traffic-related pollution, and particulate matter (PM) from urban agglomeration in Warsaw, Poland were investigated. Several magnetic methods, namely magnetic susceptibility, thermomagnetic curves, hysteresis loops, decomposition of isothermal remanent magnetization acquisition curves, and first-order reversal curves, were performed to evaluate the magnetic fraction of dust. Magnetite was the main magnetic phase in all types of samples, with a small amount of high-coercive hematite within ironworks and street dust samples. Significant differences were observed in the domain structure (grain size) of industrial and traffic-related magnetic particles. The grain size of TMP obtained from steel production was in the range of 5&ndash, 20 µ, m and was predominated by a mixture of single-domain (SD) and multidomain (MD) grains, with the prevalence of SD grains in the topsoil affected by Třinec ironwork. The traffic-related dust contained finer grains with a size of about 0.1 µ, m, which is characteristic of the pseudo-single-domain (PSD)/SD threshold. Street dusts were composed of a slightly higher proportion of MD grains, while PM also revealed the typical behavior of superparamagnetic particles.
- Published
- 2020