Characterization of iron and manganese species in atmospheric aerosols from anthropogenic sources |
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| Affiliation: | 2. Novosibirsk State University, Novosibirsk, Russia;3. International Tomography Center SB RAS, Novosibirsk, Russia;4. Aix-Marseille Université, Marseille Cedex, France;1. Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan;2. Institute of Oceanography, National Taiwan University, Taipei, Taiwan;3. Department of Marine Environmental Informatics, National Taiwan Ocean University, Keelung, Taiwan;1. School of Safety and Environmental Engineering, Capital University of Economics and Business,No.121 Zhangjialukou Rd, Fengtai District, Beijing 100070, PR China;2. College of Environmental Science and Engineering, Peking University, No.5 Yiheyuan Rd, Haidian District, Beijing 100871, PR China;4. Chongqing Environmental Monitoring Center, No.252 Qishan Rd, Yubei District, Chongqing 401147, PR China |
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| Abstract: | Electron paramagnetic resonance (EPR) was used to study the chemical form of iron, manganese and other paramagnetic species in airborne particles collected on southern coastal part of the North Sea, located in France. In parallel, chemical analysis was performed to obtain the metal concentrations in samples whereas an individual analysis of particles was provided by scanning electron microscopy coupled to an energy-dispersive X-ray spectrometer (SEM-EDX). EPR spectra have evidenced Fe3+ and Mn2+ ions in the form of isolated or agglomerated species, as well as carbonaceous products with variable signal intensities according to the wind direction. The monitoring of a signal of isolated Mn2+ ions on a distance close to 90 km was proposed as tracer of particles from a Mn local emission source. Fe3+ signals are relative to agglomerated species and differences in the type of interaction between these species were evidenced following the wind direction. Fe3+ EPR signals parameters revealing antiferromagnetic contribution in Fe-rich particles were found for an industrial origin at Dunkerque. |
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