大气气溶胶有机示踪物的非均相氧化研究进展

In order to determine the source and contribution of organic aerosols in the atmosphere and take effective pollution prevention and control measures, organic tracers are widely used to identify and evaluate harmful effects of a specific pollution source on air quality. However, studies have found that the heterogeneous oxidation reactions of organic tracers of atmospheric aerosols with atmospheric oxidants (·OH, O₃, NO₃, etc.) could lead to uncertainties in the source apportionment. This paper reviews the current research progress on the heterogeneous oxidation of organic tracers of atmospheric aerosols, mainly including primary organic tracers used to analyze aerosols from biomass combustion and cooking emissions etc., as well as secondary organic tracers for the analysis of natural or anthropogenic aerosols from gas phase precursors. The studies by domestic and foreign scholars using different methods in different locations have shown that the organic tracers that have been widely used in the source analysis of atmospheric organic aerosols were unstable, and their atmospheric lifetimes also changed with the types of organic tracers and the atmospheric environment. This paper aims to provide valuable references for accuracy correction of the tracer-based analysis in future studies and improvement of related pollution prevention and control measures.