Characteristics of fresh and aged volatile organic compounds from open burning of crop residues

doi:10.1016/j.scitotenv.2020.138545

IEECAS OpenIR > 粉尘与环境研究室

	Characteristics of fresh and aged volatile organic compounds from open burning of crop residues
	Niu, Xinyi 1; Li, Jianjun 2,3; Wang, Qiyuan 2,3; Ho, Steven Sai Hang 4,5; Sun, Jian 6; Li, Li 2,3; Cao, Junji 2,3; Ho, Kin Fai 1,7
通讯作者	Ho, Kin Fai(kfho@cuhk.edu.hk)
	2020-07-15
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
卷号	726 页码:10
摘要	Open burning of crop residues is a major source of volatile organic compounds (VOCs), which contribute substantially to the formation of secondary organic aerosols (SOAs) in the atmosphere. An integrated system of combustion chamber coupled with potential aerosol mass (PAM) reactor was used to demonstrate the emission characteristics of fresh and aged VOCs (corresponding to 2- and 7-day atmospheric aging) from the burning of rice, maize, and wheat straws. The average emission factor (EF) of quantified non-methane VOCs (NMVOCs) emitted from the straw (fresh) was 1.82 +/- 0.41 g/kg and wheat straw had the highest EFs. The EF residues of quantified NMVOCs decreased considerably after photo-oxidation in PAM. Stronger oxidation condition (7-day aging) produced a 57.2% decline in NMVOC EFs, compared with 42.3% decline during 2-day atmospheric aging. The largest declines were observed in the alkenes group: 82.6% and 66.2% after 7- and 2-day aging, respectively, which is consistent with their high reactivity toward oxidation with ozone and hydroxyl radical (center dot OH). Aromatic compounds mainly reacted with center dot OH, and their EFs decreased 59.1% on average. Alkanes were much less reactive, and their EFs only decreased an average of 29.8% after the oxidation processes. Considerable SOAs formation was observed in the fine particulate matter (PM2.5) filter samples collected after the oxidation of isoprene, benzene and toluene. The moderate to strong correlations between isoprene and isoprene-derived SOAs, between benzene and toluene with nitrophenols, and between toluene and aromatic acids demonstrate that the VOCs were degraded in the reactions with oxidative radicals, producing active contributors to SOAs formations. (C) 2020 Elsevier B.V. All rights reserved.
关键词	Biomass burning VOCs PAM Atmospheric aging SOAs formation
DOI	10.1016/j.scitotenv.2020.138545
关键词[WOS]	PEARL RIVER DELTA ; OH RADICAL PRODUCTION ; GAS-PHASE REACTIONS ; AEROSOL FORMATION ; EMISSION INVENTORIES ; GUANZHONG PLAIN ; SOURCE PROFILES ; COMPOUNDS VOCS ; RECEPTOR-SITE ; SOA FORMATION
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[91644102] ; West Light Foundation of The Chinese Academy of Sciences[XAB2018B03] ; Research Grant Council of The Hong Kong Special Administrative Region China, Theme-Based Research Scheme[T24-504/17-N]
WOS研究方向	Environmental Sciences & Ecology
项目资助者	National Natural Science Foundation of China ; West Light Foundation of The Chinese Academy of Sciences ; Research Grant Council of The Hong Kong Special Administrative Region China, Theme-Based Research Scheme
WOS类目	Environmental Sciences
WOS记录号	WOS:000537424400014
出版者	ELSEVIER
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/14886
专题	粉尘与环境研究室
通讯作者	Ho, Kin Fai
作者单位	1.Chinese Univ Hong Kong, Jockey Club Sch Publ Hlth & Primary Care, Hong Kong, Peoples R China 2.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol SKUQG, Inst Earth Environm, Xian, Peoples R China 3.Chinese Acad Sci, Key Lab Aerosol Chem & Phys, Inst Earth Environm, Xian, Peoples R China 4.Hong Kong Premium Serv & Res Lab, Hong Kong, Peoples R China 5.Desert Res Inst, Div Atmospher Sci, Reno, NV 89512 USA 6.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian, Peoples R China 7.Chinese Univ Hong Kong, Shenzhen Res Inst, Shenzhen Municipal Key Lab Hlth Risk Anal, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Niu, Xinyi,Li, Jianjun,Wang, Qiyuan,et al. Characteristics of fresh and aged volatile organic compounds from open burning of crop residues[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,726:10.
APA	Niu, Xinyi.,Li, Jianjun.,Wang, Qiyuan.,Ho, Steven Sai Hang.,Sun, Jian.,...&Ho, Kin Fai.(2020).Characteristics of fresh and aged volatile organic compounds from open burning of crop residues.SCIENCE OF THE TOTAL ENVIRONMENT,726,10.
MLA	Niu, Xinyi,et al."Characteristics of fresh and aged volatile organic compounds from open burning of crop residues".SCIENCE OF THE TOTAL ENVIRONMENT 726(2020):10.