The water-soluble organic compounds in atmospheric aerosols of BouIsmaïl city in Algeria

Résumé

Abstract Water-soluble organic compounds (WSOC) are ubiquitous substances usually found in atmospheric particles. In this work, we report the use of nuclear resonance magnetic spectroscopy techniques (1H-NMR, 13C-NMR, and 2D-NMR) in the characterisation of the WSOC in an aerosol sampled from the remote coastal location of Bou-Ismail, Algeria. These techniques, preferentially chosen to be mainly applied in this contribution, allowed us the determination of the functional composition of WSOC aerosol and the evaluation of source signature of organic aerosol. It has been recorded that 4.8–7.8 ppm, the groups were mainly constituted of precursors of the aromatic amino acids tyrosine, phenylalanine, and tryptophan, which are usually used as herbicides and antibacterial agents in agriculture. Using the HSQC technique, by combining the two regions (6.5–8.5) ppm and (115–150) ppm, revealed the appearance of many peaks in biogenic samples, including biomass burning. Specific NMR spectral allows identification of source of several organic compounds and functional composition, so the surrounding organic aerosol sources can be adjusted. Along this study, the concentrations of PM10 varied between 15.66 and 142.19 µgm− 3.

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