| Title: | Estimating Secondary Organic Aerosol Production from Toluene Photochemistry in a Megacity of China |
| Author(s): | Gao Y; Wang H; Zhang X; Jing S; Peng Y; Qiao L; Zhou M; Huang DD; Wang Q; Li X; Li L; Feng J; Ma Y; Li Y; |
| Address: | "State Environmental Protection Key Laboratory of Formation and Prevention of the Urban Air Pollution Complex , Shanghai Academy of Environmental Sciences , Shanghai 200233 , China. Department of Environment Science and Engineering , Fudan University , Shanghai 200433 , China. Atmospheric Chemistry Observation & Modeling Laboratory (ACOM) , National Center for Atmospheric Research (NCAR) , Boulder , Colorado 80301 , United States. School of Environmental and Chemical Engineering , Shanghai University , Shanghai 200444 , China" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "The production of secondary organic aerosols (SOA) from toluene photochemistry in Shanghai, a megacity of China, was estimated by two approaches, the parametrization method and the tracer-based method. The temporal profiles of toluene, together with other fifty-six volatile organic compounds (VOCs), were characterized. Combing with the vapor wall loss corrected SOA yields derived from chamber experiments, the estimated toluene SOA by the parametrization method as embodied in the two-product model contributes up to approximately 40% of the total SOA budget during summertime. 2,3-Dihydroxy-4-oxopentanoic acid (DHOPA), a unique product from the OH-initiated oxidation of toluene in the presence of elevated NO(x), was used as a tracer to back calculate the toluene SOA concentrations. By taking account for the effect of gas-particle partitioning processes on the fraction of DHOPA in the particle phase, the estimated toluene SOA concentrations agree within approximately 33% with the estimates by the parametrization method. The agreement between these two independent approaches highlight the need to update current model frameworks with recent laboratory advances for a more accurate representation of SOA formation in regions with substantial anthropogenic emissions" |
| Keywords: | Aerosols *Air Pollutants China Oxidation-Reduction Photochemistry *Toluene; |
| Notes: | "MedlineGao, Yaqin Wang, Hongli Zhang, Xuan Jing, Sheng'ao Peng, Yarong Qiao, Liping Zhou, Min Huang, Dan Dan Wang, Qian Li, Xiang Li, Li Feng, Jialiang Ma, Yingge Li, Yingjie eng 2019/07/03 Environ Sci Technol. 2019 Aug 6; 53(15):8664-8671. doi: 10.1021/acs.est.9b00651. Epub 2019 Jul 11" |
