气候变化领域集成服务门户(CCPortal): Measurement report: Hydrolyzed amino acids in fine and coarse atmospheric aerosol in Nanchang, China: Concentrations, compositions, sources and possible bacterial degradation state

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DOI	10.5194/acp-21-2585-2021
	Measurement report: Hydrolyzed amino acids in fine and coarse atmospheric aerosol in Nanchang, China: Concentrations, compositions, sources and possible bacterial degradation state
	Zhu R.-G.; Xiao H.-Y.; Luo L.; Xiao H.; Wen Z.; Zhu Y.; Fang X.; Pan Y.; Chen Z.
发表日期	2021
ISSN	1680-7316
起始页码	2585
结束页码	2600
卷号	21 期号:4
英文摘要	Amino acids (AAs) are relevant for nitrogen cycles, climate change and public health. Their size distribution may help to uncover the source, transformation and fate of protein in the atmosphere. This paper explores the use of compound-specific δ15N patterns of hydrolyzed amino acid (HAA), δ15N values of total hydrolyzed amino acid (δ15NTHAA), degradation index (DI) and the variance within trophic AAs ( P V ) as markers to examine the sources and processing history of different sizes of particle in the atmosphere. Two weeks of daily aerosol samples from five sampling sites in the Nanchang area (Jiangxi Province, China) and samples of main emission sources of AAs in aerosols (biomass burning, soil and plants) were collected (Zhu et al., 2020). Here, we measured the concentrations and δ15N values of each HAA in two size-segregated aerosol particles (>2.5 μm and PM2.5). Our results showed that the average concentrations of THAA in fine particles was nearly 6 times higher than that in coarse particles (p < 0.01) and composition profiles of fine and coarse particles were quite different from each other. The δ15N values of hydrolyzed glycine and THAA in both fine and coarse particles were typically in the range of those from biomass burning, soil and plant sources. Moreover, the average difference in the δ15NTHAA value between fine and coarse particles was smaller than 1.5 ‰. These results suggested that the sources of atmospheric HAAs for fine and coarse particles might be similar. Meanwhile, compared to fine particles, significantly lower DI values (p < 0.05), "scattered"δ15N distribution in trophic AA and higher P V values (p < 0.05) were observed in coarse particles. But the difference in δ15N values of source AA (glycine, serine, phenylalanine and lysine) and THAA between coarse particles and fine particles was relatively small. It is likely that AAs in coarse particles have advanced bacterial degradation states compared to fine particles. Besides that, the significant increase in DI values and a decrease in P V values for coarse particles were observed on days on which precipitation fell (p < 0.05). This implies that "fresh"AAs in coarse particles were likely released following the precipitation. © 2021 Author(s).
语种	英语
scopus关键词	aerosol composition; aerosol formation; concentration (composition); particle size; size distribution; China; Jiangxi; Jiangxi; Nanchang; Bacteria (microorganisms)
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/247126
作者单位	Jiangxi Province Key Laboratory of the Causes and Control of Atmospheric Pollution, East China University of Technology, Nanchang, 330013, China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Department of Earth Sciences, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, 650021, China; School of Earth Sciences, East China University of Technology, Nanchang, 330013, China
推荐引用方式 GB/T 7714	Zhu R.-G.,Xiao H.-Y.,Luo L.,et al. Measurement report: Hydrolyzed amino acids in fine and coarse atmospheric aerosol in Nanchang, China: Concentrations, compositions, sources and possible bacterial degradation state[J],2021,21(4).
APA	Zhu R.-G..,Xiao H.-Y..,Luo L..,Xiao H..,Wen Z..,...&Chen Z..(2021).Measurement report: Hydrolyzed amino acids in fine and coarse atmospheric aerosol in Nanchang, China: Concentrations, compositions, sources and possible bacterial degradation state.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(4).
MLA	Zhu R.-G.,et al."Measurement report: Hydrolyzed amino acids in fine and coarse atmospheric aerosol in Nanchang, China: Concentrations, compositions, sources and possible bacterial degradation state".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.4(2021).