| Title: | Synergistic Uptake by Acidic Sulfate Particles of Gaseous Mixtures of Glyoxal and Pinanediol |
| Author(s): | Qin Y; Ye J; Ohno PE; Lei Y; Wang J; Liu P; Thomson RJ; Martin ST; |
| Address: | "School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States. Harvard University Center for the Environment, Harvard University, Cambridge, Massachusetts 02138, United States. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States. Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States. Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, United States" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "The uptake of gaseous organic species by atmospheric particles can be affected by the reactive interactions among multiple co-condensing species, yet the underlying mechanisms remain poorly understand. Here, the uptake of unary and binary mixtures of glyoxal and pinanediol by neutral and acidic sulfate particles is investigated. These species are important products from the oxidation of volatile organic compounds (VOCs) under atmospheric conditions. The uptake to acidic aerosol particles greatly increased for a binary mixture of glyoxal and pinanediol compared to the unary counterparts. The strength of the synergism depended on the particle acidity and water content (i.e., relative humidity). The greater uptake was up to 2.5x to 8x at 10% relative humidity (RH) for glyoxal and pinanediol, respectively. At 50% RH, it was 2x and 1.2x for the two species. Possible mechanisms of acid-catalyzed cross reactions between the species are proposed to explain the synergistic uptake. The proposed mechanisms are applicable to a broader extent across atmospheric species having carbonyl and hydroxyl functionalities. The results thus suggest that synergistic uptake reactions can be expected to significantly influence the gas-particle partitioning of VOC oxidation products under atmospheric conditions and thus greatly affect their atmospheric transport and lifetime" |
| Keywords: | Aerosols *Gases *Glyoxal Sulfates Water; |
| Notes: | "MedlineQin, Yiming Ye, Jianhuai Ohno, Paul E Lei, Yali Wang, Junfeng Liu, Pengfei Thomson, Regan J Martin, Scot T eng Research Support, U.S. Gov't, Non-P.H.S. 2020/08/26 Environ Sci Technol. 2020 Oct 6; 54(19):11762-11770. doi: 10.1021/acs.est.0c02062. Epub 2020 Sep 4" |
