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Article Dans Une Revue Atmospheric Environment Année : 2019

Formation of substances with humic-like fluorescence properties, upon photoinduced oligomerization of typical phenolic compounds emitted by biomass burning

Résumé

The irradiation under simulated sunlight of some phenolic compounds typically emitted in ambient air by biomass burning, namely vanillin and acetosyringone, yielded intermediates with humic-like fluorescence properties that can be assimilated to humic-like substances (HULIS). Evidence was obtained by ultra-high-resolution mass spectrometry of the occurrence of oligomerization processes up to the formation of trimeric species. In contrast, the irradiation of other biomass-burning compounds such as vanillic acid, m-cresol and guaiacol did not yield either HULIS-type fluorescence or oligomers. We suggest that the photolysis of biomass-burning compounds is a potential HULIS source in the atmosphere, if the relevant substrates undergo photoinduced oligomerization reactions.

Domaines

Chimie

Dates et versions

hal-02190136 , version 1 (22-07-2019)

Identifiants

Citer

Davide Vione, Alexandre Albinet, Francesco Barsotti, Majda Mekic, Bin Jiang, et al.. Formation of substances with humic-like fluorescence properties, upon photoinduced oligomerization of typical phenolic compounds emitted by biomass burning. Atmospheric Environment, 2019, 206, pp.197-207. ⟨10.1016/j.atmosenv.2019.03.005⟩. ⟨hal-02190136⟩
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