EGU21-14416, updated on 28 Apr 2021
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Magnetic properties of PM in indoor/outdoor domestic environments 

Aruã Da Silva Leite, Melina Macouin, Sonia Rousse, Jean-François Leon, Loïc Drigo, and Ricardo Ivan Ferreira da Trindade
Aruã Da Silva Leite et al.
  • Universite Toulouse III, Toulouse, France (

The finer fraction of the particulate matter (PM) is the most harmful health wise, as it has more capacity to reach deeper parts of the respiratory system. Among other constituents, PM also contains iron oxides, allowing for the use of magnetic methods in its investigation as proxies for the whole of PM. Those methods present advantages in comparison to traditional ones, being quick, cost effective and sensible to investigate iron oxides among PM. 

To better understand the risks related to PM exposition in the domestic context, the assessment of magnetic parameters may be used in outdoor and indoor environments, giving us information on the concentration of iron oxides (and consequently, PM) and its dispersion from one environment to the other. 

We developed a citizen sciences experiment in the city of Toulouse, France. Tree barks were used as bio-collectors. Garlands composed of tree bark pieces were distributed to the population in May-2019, and placed in both indoors and outdoors of flats and homes to capture PM. They were retrieved after one year. Measurement of magnetic susceptibility, ARM, SIRM, S -ratio and estimation of superparamagnetic concentration were performed. A total of 86 bio-collectors kits were successfully analyzed. The preliminary results indicate a higher concentration of iron oxides outdoors, with a mean difference between outdoor and indoor measurements of 6.58x10-9m3/kg and 1.38x10-5Am2/kg in susceptibility and SIRM respectively. The concentration of the SP fraction also follows this trend of higher outdoor values. The magnetic mineralogy is mostly dominated by low coercivity magnetite-like carriers.


How to cite: Da Silva Leite, A., Macouin, M., Rousse, S., Leon, J.-F., Drigo, L., and Ivan Ferreira da Trindade, R.: Magnetic properties of PM in indoor/outdoor domestic environments , EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-14416,, 2021.

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