第19届亚运会期间杭州市有机气溶胶污染特征

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Abstract Air quality in Hangzhou was greatly improved during the 19^th Asian Games with the implementation of temporary emission control measures. Observation data collected at the Asian Games Core Supersite show that average concentration of PM_2.5 during the Games declined by 18% and 71% compared with the periods before and after the Games, respectively. Among its major components, organic aerosols (OA) displayed largest decrease in average concentration by 32%. To further understand the chemical characteristics and formation variations of OA brought by emission reductions, a thermal desorption aerosol GC/MS (TAG) online system was adopted in this study to measure hourly concentrations of total 110organic molecular markers in OA at the same site. The results show that hopanes, which are mainly emitted from vehicles, dropped most significantly among primary organic molecular groups with a mass decrease ratio of 32%. The variations of αβ-norhanpe to EC and αβ-hanpe to EC mass ratios suggest that OA collected at the supersite was more influenced by diesel emissions before and after the Games. While during the Games, their mass ratios were closer to emission inventory obtained from gasoline vehicles, indicating that restriction measures executed in diesel vehicles remarkably lowered the concentration of primary OA. Among secondary organic molecular markers, hydroxyl-carboxylic acids and dicarboxylic acids were the two groups showing highest mass proportions in TAG-measured OA. Their average concentrations also decreased during the Games by 56% and 32%, respectively. Their correlations with other organic molecular groups in OA as well as volatile organic compounds (VOCs) in the gas phase suggest that dicarboxylic acids were formed via photochemical processing from various particular and gaseous precursors, including naphthalene-related, α-pinene-related, and isoprene-related secondary organic aerosol (SOA) tracers as well as VOC species such as aldehyde ketones, furans, terpenes. While hydroxyl-carboxylic acids were mainly secondarily produced from aromatic-related and α-pinene-related SOA tracers in the particle phase. The noticeable decreases in the concentrations of hydroxyl-carboxylic acids and dicarboxylic acids as well as their precursors during the Games imply that controlling anthropogenic VOCs emissions can effectively suppress the formation of secondary OA.

Key words： organic aerosols (OA) organic molecular markers hopanes hydroxyl-carboxylic acids dicarboxylic acids

Received: 20 March 2024

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X513

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	Articles by authors
	ZHU Shu-hui
	LAI Yong
	YAN Ren-chang
	GAO Ya-qin
	SHEN Jian-dong
	WU Yu-hang
	HUANG Cong-yan
	YE Xu-hong
	JIN Jia-jia
	LIN Xu
	WANG Yun-yun
	ZHANG Tian
	FEI Luo-lan
	SHUAI Qi-fan

Cite this article:

ZHU Shu-hui,LAI Yong,YAN Ren-chang等. Chemical characteristics and variations of organic aerosols in Hangzhou during the 19^th Asian Games based on online measurements of organic molecular markers[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(11): 5980-5989.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I11/5980

[1] 徐宏辉,徐婧莎,何俊,等.杭甬地区大气中含碳气溶胶特征及来源分析 [J]. 环境科学, 2018,39(8):3511-3517. Xu H H, Xu J S, He J, et al. Characteristics and source analysis of atmospheric carbonaceous aerosols in the cities of Hangzhou and Ningbo [J]. Environmental Science, 2018,39(8):3511-3517.
[2] Niu Y W, Li X L, Qi B, et al. Variation in the concentrations of atmospheric PM_2.5 and its main chemical components in an eastern China city (Hangzhou) since the release of the Air Pollution Prevention and Control Action Plan in 2013 [J]. Air Quality, Atmosphere and Health, 2022,15(2):321-337.
[3] Duan L, Yu H M, Wang Q Z, et al. A comprehensive exploration of characteristics and source attribution of carbonaceous aerosols in PM_2.5 in an East China megacity [J]. Environmental Pollution, 2024, 343:123239-123239.
[4] Chen K, Metcalfe S E, Yu H, et al. Characteristics and source attribution of PM_2.5 during 2016G20 Summit in Hangzhou: Efficacy of radical measures to reduce source emissions [J]. Journal of Environmental Sciences (China), 2021,106:47-65.
[5] Ji Y, Qin X F, Wang B, et al. Counteractive effects of regional transport and emission control on the formation of fine particles: a case study during the Hangzhou G20summit [J]. Atmospheric Chemistry and Physics, 2018,18(18):13581-13600.
[6] Li K W, Chen L H, White S J, et al. Chemical characteristics and sources of PM₁ during the 2016 summer in Hangzhou [J]. Environmental Pollution, 2018,232:42-54.
[7] Rattanavaraha W, Canagaratna M R, Budisulistiorini S H, et al. Source apportionment of submicron organic aerosol collected from Atlanta, Georgia, during 2014~2015 using the aerosol chemical speciation monitor (ACSM) [J]. Atmospheric Environment, 2017,167:389-402.
[8] 朱书慧.基于高分辨率在线观测数据分析上海市城区秋冬季大气有机气溶胶化学特征及污染来源 [J]. 环境科学, 2023,44(7):3760-3770. Zhu S H. Chemical characteristics and source apportionment of organic aerosols in urban shanghai during cold season based on high time-resolution measurements of organic molecular markers [J]. Environmental Science, 2023,44(7):3760-3770.
[9] Zhu S H, Zhou M, Qiao L P, et al. Evolution and chemical characteristics of organic aerosols during wintertime PM_2.5 episodes in Shanghai, China: insights gained from online measurements of organic molecular markers [J]. Atmospheric Chemistry and Physics, 2023,23 (13):7551-7568.
[10] Peng Y R, Wang H L, Gao Y Q, et al. Real-time measurement of phase partitioning of organic compounds using a proton-transfer-reaction time-of-flight mass spectrometer coupled to a CHARON inlet [J]. Atmospheric Measurement Techniques, 2023,16(1):15-28.
[11] Gao Y Q, Wang H L, Yuan L L, et al. Measurement report: Underestimated reactive organic gases from residential combustion -insights from a near-complete speciation [J]. Atmospheric Chemistry and Physics, 2023,23(12):6633-6646.
[12] Liu Y H, Wang H L, Jing S A, et al. Characteristics and sources of volatile organic compounds (VOCs) in Shanghai during summer: Implications of regional transport [J]. Atmospheric Environment, 2019, 215:116902-116915.
[13] Xu J S, Jia C R, He J, et al. Biomass burning and fungal spores as sources of fine aerosols in Yangtze River Delta, China -Using multiple organic tracers to understand variability, correlations and origins [J]. Environmental Pollution, 2019,251:155-165.
[14] Wang Q Q, Huang X H, Griffith S M, et al. Nonpolar organic compounds as PM_2.5 source tracers: Investigation of their sources and degradation in the Pearl River Delta, China [J]. Journal of Geophysical Research: Atmospheres, 2016,121(19):11862-11879.
[15] Fraser M P, Lakshmanan K, Fritz S G, et al. Variation in composition of fine particulate emissions from heavy-duty diesel vehicles [J]. Journal of Geophysical Research, 2002,107(21):ICC 8-1-ICC 8-6.
[16] Schauer J J, Kleeman M J, Cass G R, et al. Measurement of emissions from air pollution sources. 5. C-1-C-32organic compounds from gasoline-powered motor vehicles [J]. Environmental Science & Technology, 2002,36(6):1169-1180.
[17] He L Y, Hu M, Zhang Y H, et al. Fine particle emissions from on-road vehicles in the Zhujiang Tunnel, China [J]. Environmental Science & Technology, 2008,42(12):4461-4466.
[18] Yu J Z, Huang X H, Ho S H, et al. Nonpolar organic compounds in fine particles: quantification by thermal desorption-GC/MS and evidence for their significant oxidation in ambient aerosols in Hong Kong [J]. Analytical and Bioanalytical Chemistry, 2011,401(10): 3125-3139.
[19] Simoneit R T. Biomass Burning-A Review of Organic Tracers for Smoke from Incomplete Combustion [J]. Applied Geochemistry, 2002, 17(3):129-162.
[20] Cheng Y, Engling G, He K B, et al. Biomass burning contribution to Beijing aerosol [J]. Atmospheric Chemistry and Physics, 2013,13(15): 7765-7781.
[21] Fine P M, Cass G R, Simoneit R T. Chemical characterization of fine particle emissions from fireplace combustion of woods grown in the northeastern United States [J]. Environmental Science & Technology, 2001,35(13):2665-2675.
[22] Ho K F, Lee S C, Ho S H, et al. Dicarboxylic acids, ketocarboxylic acids, α-dicarbonyls, fatty acids, and benzoic acid in urban aerosols collected during the 2006 Campaign of Air Quality Research in Beijing (CAREBeijing-2006) [J]. Journal of Geophysical Research: Atmospheres, 2010,115(19),doi:10.1029/2009JD013304.
[23] Kawamura K, SEMPERE R, Imai Y, et al. Water soluble dicarboxylic acids and related compounds in Antarctic aerosols [J]. Journal of Geophysical Research: Atmospheres, 1996,101(13):18721-18728.
[24] Zhao W, Kawamura K, Yue S, et al. Molecular distribution and compound-specific stable carbon isotopic composition of dicarboxylic acids, oxocarboxylic acids and α-dicarbonyls in PM_2.5 from Beijing, China [J]. Atmospheric Chemistry and Physics, 2018,18(4):2749-2767.