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Chemosphere

Title:		"Contribution of biogenic sources to secondary organic aerosol in the summertime in Shaanxi, China"
Author(s):		Xu Y; Chen Y; Gao J; Zhu S; Ying Q; Hu J; Wang P; Feng L; Kang H; Wang D;
Address:		"College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, China; Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), Nanjing University of Information Science & Technology, Nanjing, 210044, China; College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, 225009, China. College of Landscape Architecture and Arts, Northwest A&F University, Yangling, Shaanxi, 712100, China. Engineering Technology Development Center of Urban Water Recycling, Shenzhen Polytechnic, Shenzhen, 518055, China. Department of Environmental Science and Engineering, Fudan University, Shanghai, 200438, China. Department of Civil Engineering, Texas A&M University, College Station, TX, 77843, USA. Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), Nanjing University of Information Science & Technology, Nanjing, 210044, China. College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, 225009, China. College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, China. College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, China. Electronic address: wangdx66@sohu.com"
Journal Title:		Chemosphere
Year:		2020
Volume:		20200418
Issue:
Page Number:		126815 -
DOI:		10.1016/j.chemosphere.2020.126815
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"A revised Community Multi-scale Air Quality (CMAQ) model with updated secondary organic aerosol (SOA) yields and a more detailed description of SOA formation from isoprene (ISOP) oxidation was applied to study the spatial distribution of SOA, its components and precursors in Shaanxi in July of 2013. The emissions of biogenic volatile organic compounds (BVOCs) were generated using the Model of Emissions of Gases and Aerosols from Nature (MEGAN), of which ISOP and monoterpene (MONO) were the top two, with 1.73 x 10(9) mol and 1.82 x 10(8) mol, respectively. The spatial distribution of BVOCs emission was significantly correlated with the vegetation coverage distribution. ISOP and its intermediate semi-volatile gases were up to approximately 7.0 and approximately 1.4 ppb respectively in the ambient. SOA was generally 2-6 mug/m(3), of which biogenic SOA (BSOA) accounted for as high as 84% on average. There were three main BVOCs Precursors including ISOP (58%) and MONO (8%) emit in the studied domain, and ISOP (9%) transported. The Guanzhong Plain had the highest BSOA concentrations of 3-5 mug/m(3), and the North Shaanxi had the lowest of 2-3 mug/m(3). More than half of BSOA was due to reactive surface uptake of ISOP epoxide (0.2-0.7 mug/m(3), approximately 19%), glyoxal (GLY) (0.2-0.5 mug/m(3), approximately 11%) and methylglyoxal (MGLY) (0.4-1.4 mug/m(3), approximately 32%), while the remaining was due to the traditional equilibrium partitioning of semi-volatile components (0.1-1.2 mug/m(3), approximately 25%) and oligomerization (0.2-0.4 mug/m(3), approximately 12%). Overall, SOA formed from ISOP contributed 1-3 mug/m(3) ( approximately 80%) to BSOA"
Keywords:		Aerosols/*analysis Air Pollutants/*analysis Air Pollution Butadienes China *Environmental Monitoring Hemiterpenes Monoterpenes/analysis Volatile Organic Compounds/analysis Bsoa Cmaq Isoprene Megan Precursors;
Notes:		"MedlineXu, Yong Chen, Yonggui Gao, Jingsi Zhu, Shengqiang Ying, Qi Hu, Jianlin Wang, Peng Feng, Liguo Kang, Haibin Wang, Dexiang eng England 2020/09/23 Chemosphere. 2020 Sep; 254:126815. doi: 10.1016/j.chemosphere.2020.126815. Epub 2020 Apr 18"