《A new advance in pollution profile, transformation process, and contribution to aerosol formation and aging of atmospheric amines》
Website： https://doi.org/10.1039/D2EA00167E
Graphical Abstract:
Abstract:
Amines, formed with the replacement of hydrogen atoms by NH3 molecules of volatile organic compounds, possess distinctive properties of alkalinity, volatility, water-solubility and oxidability, and attract more and more attentions due to significant contributions to atmospheric pollution during past few decades. To understand the environmental behaviors of amines in the atmospheric pollution process, this review mainly summarizes new advance in sources and sinks of amines and their effects on atmospheric particulate matter (PM) formation and climate evolution within last decade. First, the pollution profiles and sources identification of amines are summarized. Some newfound sources of amines are correspondingly updated. Meanwhile, the current monitoring methods of amines are also evaluated. Second, the atmospheric oxidation reaction mechanisms of amines with various active radicals are discussed. Third, the combined data of field monitoring, laboratory experiments and theoretical calculations verified that amines contribute significantly to aerosol particles, including oxidation product condensation, direct dissolution, acid-base reaction and replacement reaction. Besides, we discussed how amine affect climate directly or indirectly by generating brown carbon in PM, enhancing hygroscopicity, and activating cloud condensation nuclei. In all, the review provides new insights into the overall atmospheric circulation and final fate of amines as well as their effects on atmospheric aerosol particles formation and climate.
