Hydroxymethanesulfonate and Sulfur(IV) in Fairbanks Winter During the ALPACA Study.

ABSTRACT: Hydroxymethanesulfonate (HMS) in fine aerosol particles has been reported at significant concentrations along with sulfate under extreme cold conditions (-35 °C) in Fairbanks, Alaska, a high latitude city. HMS, a component of S(IV) and an adduct of formaldehyde and sulfur dioxide, forms in liquid water. Previous studies may have overestimated HMS concentrations by grouping it with other S(IV) species. In this work, we further investigate HMS and the speciation of S(IV) through the Alaskan Layered Pollution and Chemical Analysis (ALPACA) intensive study in Fairbanks. We developed a method utilizing hydrogen peroxide to isolate HMS and found that approximately 50% of S(IV) is HMS for total suspended particulates and 70% for PM_2.5. The remaining unidentified S(IV) species are close

SUBMITTER: Dingilian K 

PROVIDER: S-EPMC11250035 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature