| Title: | Organosulfates as tracers for secondary organic aerosol (SOA) formation from 2-methyl-3-buten-2-ol (MBO) in the atmosphere |
| Author(s): | Zhang H; Worton DR; Lewandowski M; Ortega J; Rubitschun CL; Park JH; Kristensen K; Campuzano-Jost P; Day DA; Jimenez JL; Jaoui M; Offenberg JH; Kleindienst TE; Gilman J; Kuster WC; de Gouw J; Park C; Schade GW; Frossard AA; Russell L; Kaser L; Jud W; Hansel A; Cappellin L; Karl T; Glasius M; Guenther A; Goldstein AH; Seinfeld JH; Gold A; Kamens RM; Surratt JD; |
| Address: | "Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Print) 0013-936X (Linking) |
| Abstract: | "2-Methyl-3-buten-2-ol (MBO) is an important biogenic volatile organic compound (BVOC) emitted by pine trees and a potential precursor of atmospheric secondary organic aerosol (SOA) in forested regions. In the present study, hydroxyl radical (OH)-initiated oxidation of MBO was examined in smog chambers under varied initial nitric oxide (NO) and aerosol acidity levels. Results indicate measurable SOA from MBO under low-NO conditions. Moreover, increasing aerosol acidity was found to enhance MBO SOA. Chemical characterization of laboratory-generated MBO SOA reveals that an organosulfate species (C(5)H(12)O(6)S, MW 200) formed and was substantially enhanced with elevated aerosol acidity. Ambient fine aerosol (PM(2.5)) samples collected from the BEARPEX campaign during 2007 and 2009, as well as from the BEACHON-RoMBAS campaign during 2011, were also analyzed. The MBO-derived organosulfate characterized from laboratory-generated aerosol was observed in PM(2.5) collected from these campaigns, demonstrating that it is a molecular tracer for MBO-initiated SOA in the atmosphere. Furthermore, mass concentrations of the MBO-derived organosulfate are well correlated with MBO mixing ratio, temperature, and acidity in the field campaigns. Importantly, this compound accounted for an average of 0.25% and as high as 1% of the total organic aerosol mass during BEARPEX 2009. An epoxide intermediate generated under low-NO conditions is tentatively proposed to produce MBO SOA" |
| Keywords: | "Aerosols/*chemistry Air Pollutants/*chemistry Atmosphere/*chemistry Hydroxyl Radical/chemistry Nitric Oxide/chemistry Oxidants, Photochemical/chemistry Oxidation-Reduction Pentanols/*chemistry Pinus/chemistry Sulfuric Acid Esters/*chemistry Volatile Organ;" |
| Notes: | "MedlineZhang, Haofei Worton, David R Lewandowski, Michael Ortega, John Rubitschun, Caitlin L Park, Jeong-Hoo Kristensen, Kasper Campuzano-Jost, Pedro Day, Douglas A Jimenez, Jose L Jaoui, Mohammed Offenberg, John H Kleindienst, Tadeusz E Gilman, Jessica Kuster, William C de Gouw, Joost Park, Changhyoun Schade, Gunnar W Frossard, Amanda A Russell, Lynn Kaser, Lisa Jud, Werner Hansel, Armin Cappellin, Luca Karl, Thomas Glasius, Marianne Guenther, Alex Goldstein, Allen H Seinfeld, John H Gold, Avram Kamens, Richard M Surratt, Jason D eng P30 ES010126/ES/NIEHS NIH HHS/ 5P20-ES10126/ES/NIEHS NIH HHS/ Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2012/08/02 Environ Sci Technol. 2012 Sep 4; 46(17):9437-46. doi: 10.1021/es301648z. Epub 2012 Aug 17" |
