Polar organic tracers in PM_(2.5) aerosols from an inland background area in Southwest China: Correlations between secondary organic aerosol tracers and source apportionment

作     者：Li Li Wei Lai Jinguo Pu Hengqin Mo Dongjue Dai Guilin Wu Shihuai Deng 

作者机构：Rural Environment Protection Engineering & Technology Center of Sichuan Province College of Environment Sichuan Agricultural University School of Environment Tsinghua University 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2018年第30卷第7期

页      面：281-293页

核心收录：

学科分类：07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：supported by the National Natural Science Foundation of China(No.41073101) the Youth Fund of Education Department of Sichuan Province(No.11ZB065) the Open Fund of State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex(SCAPC)of Tsinghua University(No.110001122) 

主　　题：Isoprene oxidation products α-Pinene oxidation products β-Caryophyllinic acid Positive matrix factorization(PMF) Gongga Mountain National Nature Reserve 

摘      要：PM2.5 aerosol samples were collected over 12 hr and 24 hr intervals in an inland background area, Gongga Mountain National Nature Reserve（hereafter shortened to Gongga）, during the summer of 2011. Polar organic tracers, inorganic ions and meteorological data were measured. The purpose of this work was to investigate the variation patterns, formation and sources of the secondary organic aerosol tracers in the studied atmosphere. The average concentrations of isoprene oxidation products, α-pinene oxidation products, β-caryophyllinic acid, sugars, sugar alcohols and anhydrosugars were 88.6 ± 106.1, 3.6 ± 5.7,0.13 ± 0.30, 13.6 ± 13.1, 31.9 ± 31.4 and 14.8 ± 10.7 ng/m^3 respectively in all aerosol *** aged α-pinene second organic aerosol（SOA） tracers（i.e., 3-hydroxyglutraric acid（3 HGA）, 3-hydroxy-2,2-dimethylglutaric acid（HDMGA）, 3-acetylpentandioic acid（APDA） and 3-methyl-1,2,3-butanetricarboxylic acid（MBTCA）） correlated significantly with each other in the 24 hr PM2.5 aerosol samples, indicating that OH· is the major factor controlling the formation of these α-pinene SOA tracers. Using the positive matrix factorization（PMF） model and the tracer-based source apportionment method, we calculated that isoprene oxidation products, α-pinene oxidation products, sesquiterpene oxidation products, biomass burning, fungi spores and anthropogenic SOA accounted for 21.9% ± 5.5%, 8.4% ± 2.1%, 3.0% ± 0.7%, 5.2% ± 5.3%, 5.0% ± 6.2% and 31.4% ± 7.8% of organic carbon respectively during the sampling period.