Concentration, distribution and variation of polar organic aerosol tracers in Ya'an, a middle-sized city in western China
Concentration, distribution and variation of polar organic aerosol tracers in Ya'an, a middle-sized city in western China
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西部中等城市雅安极地有机气溶胶示踪剂浓度、分布及变化
DOI：
10.1016/j.atmosres.2012.07.024
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发表时间：
2013-02
影响因子：
5.5
通讯作者：
Wu, Sishi
中科院分区：
文献类型：
--
作者：
Zhang, Yanzong;Dai, Dongjue;Deng, Shihuai;Feng, Jialiang;Zhao, Min;Wu, Jun;Liu, Lu;Yang, Xiaohui;Wu, Sishi
以西南木材资源丰富的中等城市雅安为研究对象，采集了大气中PM2.5（空气动力直径<2.5μm的颗粒物）和TSP（总悬浮颗粒物）气溶胶样品，分析了次生有机气溶胶（SOA）对区域对流层的贡献、有机示踪剂的组成及其浓度的影响因素。本研究于2010年6 - 7月在四川农业大学校园（雅安市区）采集了34份样本，在四川农业大学东北约30km处的白马泉景区（森林区）采集了49份样本。采用GC/MS分析，有机示踪剂包括异戊二烯氧化产物（2-甲基四醇、c5 -烯三醇和2-甲基甘油）、α-/β-蒎烯氧化产物（去甲蒎酸、3-羟基戊二酸、3-羟基4,4-二甲基戊二酸和3-甲基-1,2,3-丁三羧酸）、倍半萜氧化产物（β-石油酸）、糖（葡萄糖和果糖）、糖醇（arabitol、甘露醇、赤四糖醇、山梨糖醇和木糖醇）、测定无水糖（左旋葡聚糖、甘露糖和半乳糖糖）和苹果酸。监测了可能影响SOA示踪剂浓度的因素，即痕量气体（SO2、NOx、O3、NH3）、气溶胶酸度和气象参数。结果表明，2-甲基四醇、c5 -烯三醇和2-甲基甘油的氧化产物总浓度分别为72和82ng/m3， SAU为29±18、37±9、6±2ng/m3， BSSA为57±34、33±33、4±2ng/m3。与异戊二烯氧化产物相比，α-/β-蒎烯氧化产物和β-石竹酸氧化产物的浓度较低，SAU分别为6±33和0.5±1.9ng/m3at， BSSA分别为9±14和1.0±1.2ng/m3at。异戊二烯氧化产物的独特组成，特别是c5 -烯三醇的高浓度及其相对丰度与2-甲基四醇相当，可能是由于它们是由c5 -环氧二醇在弱酸性气溶胶上的酸催化反应形成的。此外，糖和糖醇在两个研究区域的重要组分中进行了测量，SAU和BSSA的中位数浓度分别为309.7和465.7ng/m3at。研究区糖和糖醇的高丰度与温暖湿润气候下肥沃土壤中微生物旺盛的代谢和亚热带植被旺盛的生理活动有关。检测到的有机示踪剂占研究大气中有机碳（OC）的1.5-1.8%，其中约15-21%的OC可分配给生物源气溶胶源和源过程。
PM2.5(particulate matter with an aerodynamic diameter <2.5μm) and TSP (total suspended particulates) aerosol samples were collected in Ya'an, a middle-sized city with extensive wood resources in Southwestern China, to characterize the contribution of secondary organic aerosols (SOA) to the regional troposphere, the composition of the organic tracers as well as factors affecting their concentrations. A total of 34 samples were gathered on the Campus of Sichuan Agricultural University (SAU, urban site, in the city zone of Ya'an), while 49 samples were collected at Baima Spring Scenic Area (BSSA, forest site, situated about 30km to the northeast of SAU) during June to July, 2010. Using GC/MS analysis with prior trimethylsilylation, organic tracers including isoprene oxidation products (2-methyltetrols, C5-alkene triols and 2-methylglyceric acid), α-/β-pinene oxidation products (norpinic acid, 3-hydroxyglutaric acid, 3-hydroxy-4,4-dimethylglutaric acid, and 3-methyl-1,2,3- butanetricarboxylic acid), a sesquiterpene oxidation product (β-caryophyllinic acid), sugars (glucose and fructose), sugar alcohols (arabitol, mannitol, erythritol, sorbitol and xylitol), anhydrosugars (levoglucosan, mannosan and galactosan) and malic acid were determined. The factors that could potentially affect the SOA tracer concentrations, i.e. trace gases (SO2, NOx, O3, NH3), aerosol acidity and meteorological parameters, were monitored. The results showed that the concentrations of total isoprene oxidation products were 72 and 82ng/m3at the two sampling locations, with 29±18, 37±9, 6±2ng/m3at SAU and 57±34, 33±33, 4±2ng/m3at BSSA for 2-methyltetrols, C5-alkene triols and 2-methylglyceric acid respectively. Compared with the concentrations of isoprene oxidation products, those of α-/β-pinene oxidation products and β-caryophyllinic acid were much lower, being 6±33 and 0.5±1.9ng/m3at SAU, and 9±14 and 1.0±1.2ng/m3at BSSA, respectively. The unique composition of isoprene oxidation products, particularly, the high concentrations of the C5-alkene triols and their relative abundances comparable to those of the 2-methyltetrols, are possibly due to the fact that they are formed through acid-catalyzed reactions of C5-epoxydiols on weak acidic aerosols. Moreover, sugars and sugar alcohols were measured in important fractions at the two study areas, with the median concentrations of 309.7 and 465.7ng/m3at SAU and BSSA, respectively. The high abundances of sugar and sugar alcohols in the study area are explained by the robust metabolism of microorganism in the fertile soil under the warm and moist climate as well as vigorous physiological activities of vegetations in the exuberant subtropical areas. The detected organic tracers accounted in total for 1.5–1.8% of organic carbon (OC) in the study atmosphere, and about 15–21% of the OC could in total be apportioned to biogenic aerosol sources and source processes.
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DOI：
10.1080/00022470.1981.10465276
发表时间：
1981-07
期刊：
Journal of the Air Pollution Control Association
影响因子：
--
作者：
P. Dasgupta
通讯作者：
P. Dasgupta
影响因子：
6.3
作者：
Wu Wang;M. H. Wu;Li Li-Li;T. Zhang;X. Liu;J. L. Feng;H. Li;Yangjun Wang;G. Sheng;M. Claeys;Jia-mo Fu
通讯作者：
Wu Wang;M. H. Wu;Li Li-Li;T. Zhang;X. Liu;J. L. Feng;H. Li;Yangjun Wang;G. Sheng;M. Claeys;Jia-mo Fu
影响因子：
11.4
作者：
Lin, Ying-Hsuan;Zhang, Zhenfa;Docherty, Kenneth S.;Zhang, Haofei;Budisulistiorini, Sri Hapsari;Rubitschun, Caitlin L.;Shaw, Stephanie L.;Knipping, Eladio M.;Edgerton, Eric S.;Kleindienst, Tadeusz E.;Gold, Avram;Surratt, Jason D.
通讯作者：
Surratt, Jason D.
影响因子：
11.4
作者：
Kroll, JH;Ng, NL;Seinfeld, JH
通讯作者：
Seinfeld, JH
影响因子：
6.3
作者：
Chan, A. W. H.;Chan, M. N.;Seinfeld, J. H.
通讯作者：
Seinfeld, J. H.