| Title: | "[Secondary organic tracers in summer PM2.5 aerosols from Baima Spring Scenic Area, Yaan, Sichuan Province]" |
| Author(s): | Dai DJ; Li L; Liu ZF; Zhao M; Feng JL; Lai W; Zeng YM; Zhou Y; Liu LY; Deng SH; |
| Address: | "College of Resources and Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China. 380083187@qq.com" |
| ISSN/ISBN: | 0250-3301 (Print) 0250-3301 (Linking) |
| Abstract: | "Integrated PM2.5 aerosol samples were collected at Baima Spring Scenic Area, a forest site of Yaan, Sichuan Province, during the summer of 2010. Organic speciation including isoprene oxidation products (2-methyltetrols, C5-alkene trols, 2-methylyceric acid), alpha-/beta-pinene oxidation products (norpinic acid, 3-hydroxyglutaric acid, 3-methy-1,2,3-butanetricarboxylic acid), and small molecular carboxylic acid (malic acid, 2-hydroxyglutaric acid) were analyzed. The generation mechanisms of SOA as well as their influencing factors were particularly discussed. Results show that average concentrations of 2-methyltetrols, C5-alkene triols, 2-methyglyceric acid, norpinic acid, 3-hydroxyglutaric acid and 3-methy-1,2,3-butanetricarboxylic acid are 63.3, 45.0, 4.4, 4.1, 5.0, 5.3 ng x m(-3) respectively, of 24-hour lapse samples. SOA compounds are consistent with higher concentrations in the day than during the night only except for norpinic acid. Relatively high level of biogenic SOA at the study area is concerned with many environmental factors, i. e. local abundant vegetations, warm and humid climate, sunken valley topography, the atmospheric pollution state, etc" |
| Keywords: | Aerosols/*analysis Air Pollutants/*analysis Atmosphere/analysis China *Environmental Monitoring Particulate Matter/*analysis Seasons Volatile Organic Compounds/*analysis; |
| Notes: | "MedlineDai, Dong-Jue Li, Li Liu, Zi-Fang Zhao, Min Feng, Jia-Liang Lai, Wei Zeng, Yan-Mei Zhou, Yu Liu, Lu-Yun Deng, Shi-Huai chi English Abstract Research Support, Non-U.S. Gov't China 2012/06/23 Huan Jing Ke Xue. 2012 Apr; 33(4):1063-70" |
