Chemistry Between the Sea Surface Microlayer and Marine Aerosols

Alves, Célia

doi:10.5935/0100-4042.20140223

Cited by 1 publication

(1 citation statement)

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“…This organic-rich layer provides a connection between the ocean and the atmosphere, linking two disparate environments and allowing for the transport of material between them. The organic material in the SML is primarily provided by biological sources, − but abiotic photochemically processed sources may also be important contributors. ,,− In addition to POA, secondary organic aerosols (SOA) can be formed from further reactions of organic material, in either the gas or the particle phase, including aqueous-phase photochemical processes. ,,− In particular, the direct photochemical reactivity of organic molecules in the SML has been a source of recent interest in the literature ,,− and has been shown to result in the formation of SOA …”

Section: Introductionmentioning

confidence: 99%

pH Dependence of the Aqueous Photochemistry of α-Keto Acids

et al. 2017

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α-Keto acids are important, atmospherically relevant species, and their photochemistry has been considered in the formation and processing of aerosols. Despite their atmospheric relevance, the photochemistry of these species has primarily been studied under extremely low pH conditions. Using a variety of analytical techniques, we characterize the extent of hydration and deprotonation for solutions of two α-keto acids, pyruvic acid and 2-oxooctanoic acid, as a function of pH. We find that changes in the initial solution composition govern the accessibility of different photochemical pathways, resulting in slowed photolysis under high pH conditions and a shift in photoproducts that can be predicted mechanistically.

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