Direct quantification of changes in pH within single levitated microdroplets and the kinetics of nitrate and chloride depletion.

ABSTRACT: The hygroscopicity and pH of aqueous microdroplets and smaller aerosols control their impacts on human health and the climate. Nitrate depletion and chloride depletion through the partitioning of HNO₃ and HCl into the gas phase are processes that are enhanced in micron-sized and smaller aqueous droplets and this depletion influences both hygroscopicity and pH. Despite a number of studies, uncertainties remain about these processes. While acid evaporation and the loss of HCl or HNO₃ have been observed during dehydration, there is a question as to the rate of acid evaporation and whether this can occur in fully hydrated droplets at higher relative humidity (RH). To directly elucidate the kinetics of nitrate and chloride depletion through evaporation of HNO₃ a

SUBMITTER: Angle KJ 

PROVIDER: S-EPMC10266444 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature