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DOI	10.5194/acp-22-7489-2022
	Distribution and stable carbon isotopic composition of dicarboxylic acids, ketocarboxylic acids and alpha-dicarbonyls in fresh and aged biomass burning aerosols
	Shen, Minxia; Ho, Kin Fai; Dai, Wenting; Liu, Suixin; Zhang, Ting; Wang, Qiyuan; Meng, Jingjing; Chow, Judith C.; Watson, John G.; Cao, Junji; Li, Jianjun
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	7489
结束页码	7504
卷号	22 期号:11 页码:16
英文摘要	Biomass burning (BB) is a significant source of dicarboxylic acids (diacids) and related compounds that play important roles in atmospheric chemistry and climate change. In this study, a combustion chamber and oxidation flow reactor were used to generate fresh and aged aerosols from burned rice, maize and wheat straw to investigate atmospheric aging and the stable carbon isotopic (delta C-13) composition of these emissions. Succinic acid (C-4) was the most abundant species in fresh samples, while oxalic acid (C-2) became dominant after atmospheric aging. Of all diacids, C-2 had the highest aged to fresh emission ratios (A/F), suggesting that C-2 is largely produced through secondary photochemical processes. Compared with fresh samples, the emission factors of ketocarboxylic acids and alpha-dicarbonyls increased after 2 d but decreased after 7 d aging, indicating a short residence time and further atmospheric degradation from 2 to 7 d. The delta C-13 values of C-2 for aged biomass samples were higher than those of urban aerosols but lower than marine or mountain aerosols, and the delta C-13 values of C-2 became isotopically heavier during aging. Relationships between the reduction in volatile organic compounds (VOCs), such as toluene, benzene and isoprene, and increase in diacids after 2 d aging indicate that these VOCs led to the formation of diacids. However, no significant correlation was found between decreases in VOCs and increases in 7 d aged diacids. In addition, the A/F of C-2 was 50.8 at 2 d and 64.5 at 7 d, indicating that the conversion of VOCs to C-2 was almost completed within 2 d. For the longer aging times, the particulate-phase compounds may undergo further degradation in the oxidation processes.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000808540400001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273682
作者单位	Chinese Academy of Sciences; Institute of Earth Environment, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese University of Hong Kong; Chinese University of Hong Kong, Shenzhen; Liaocheng University; Nevada System of Higher Education (NSHE); Desert Research Institute NSHE
推荐引用方式 GB/T 7714	Shen, Minxia,Ho, Kin Fai,Dai, Wenting,et al. Distribution and stable carbon isotopic composition of dicarboxylic acids, ketocarboxylic acids and alpha-dicarbonyls in fresh and aged biomass burning aerosols[J],2022,22(11):16.
APA	Shen, Minxia.,Ho, Kin Fai.,Dai, Wenting.,Liu, Suixin.,Zhang, Ting.,...&Li, Jianjun.(2022).Distribution and stable carbon isotopic composition of dicarboxylic acids, ketocarboxylic acids and alpha-dicarbonyls in fresh and aged biomass burning aerosols.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(11),16.
MLA	Shen, Minxia,et al."Distribution and stable carbon isotopic composition of dicarboxylic acids, ketocarboxylic acids and alpha-dicarbonyls in fresh and aged biomass burning aerosols".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.11(2022):16.