Rock magnetic and micro-morphological analysis on snow deposits: recognition of anthropogenic origin of particulate matter in urban and wilderness areas (central Italy)

Main Article Content

Laura Leonilde Alfonsi
Patrizia Macrì
https://orcid.org/0000-0003-2287-4019
Manuela Nazzari

Abstract

Low field magnetic susceptibility and other rock magnetic analyses are applied to inspect the magnetic nature of solid residuals in snow samples collected in downtown Rome and in two Natural Parks in central Italy. Field emission scanning electron microscope and energy dispersive spectroscopy (FESEM-EDS) analyses are utilized to reveal the nature of Fe-rich particles and discriminate their anthropogenic origin. The results indicate that magnetite (Fe3O4) is the main magnetic carrier in almost all samples and that the variations in concentration are directly associated with local sources of particulate matter (PM) from anthropogenic pollution related to automotive circulation in both environments. Magnetic minerals of other provenance are found as accessories. The snow deposits revealed to be an efficient neutral tool for fine particle collections, also in environments characterized by different concentration and source of pollutants.

Article Details

How to Cite
1.
Alfonsi LL, Macrì P, Nazzari M. Rock magnetic and micro-morphological analysis on snow deposits: recognition of anthropogenic origin of particulate matter in urban and wilderness areas (central Italy). Ann. Geophys. [Internet]. 2021May26 [cited 2021Sep.27];64(2):GM215. Available from: https://www.annalsofgeophysics.eu/index.php/annals/article/view/8515
Section
Geomagnetism and Paleomagnetism
Author Biographies

Laura Leonilde Alfonsi, Istituto Nazionale di geofisica e Vulcanologia

Ambiente Senior researcher

Patrizia Macrì, Istituto Nazionale di geofisica e Vulcanologia

Ambiente researcher

Manuela Nazzari, Istituto Nazionale di geofisica e Vulcanologia

HPHT Laboratory Researcher

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