Seasonal and diurnal variation of PM2.5 HULIS over Xi'an in Northwest China: Optical properties, chemical functional group, and relationship with reactive oxygen species (ROS)

doi:10.1016/j.atmosenv.2021.118782

IEECAS OpenIR > 粉尘与环境研究室

	Seasonal and diurnal variation of PM2.5 HULIS over Xi'an in Northwest China: Optical properties, chemical functional group, and relationship with reactive oxygen species (ROS)
	Zhang, Tian 1,2; Huang, Shasha 1; Wang, Diwei 1; Sun, Jian 1; Zhang, Qian 3; Xu, Hongmei 1; Ho, Steven Sai Hang 4; Cao, Junji 2; Shen, Zhenxing 1,2
通讯作者	Shen, Zhenxing(zxshen@mail.xjtu.edu.cn)
	2022
发表期刊	ATMOSPHERIC ENVIRONMENT
ISSN	1352-2310
卷号	268 页码:9
摘要	Humic-like substances (HULIS) in particulate matter (PM) play critical roles in the atmospheric changes in our environment. In this study, high time resolution PM2.5 samples were collected to insight the abundances, spectroscopic characters, chemical groups, and oxidative potential of HULIS in Xi'an, China. The average mass concentrations of HULIS in term of carbon (HULIS-C) was 11.55 +/- 5.85 and 8.28 +/- 2.23 mu g C m(-3) in winter and summer, respectively. The diurnal variations of HULIS displayed three peaks (03:00-07:00, 10:00-14:00, and 18:00-21:00 LT) in winter, but a single peak (08:00-12:00 LT) in summer. The optical parameters show obvious difference between winter and summer. Fourier Transform infrared (FT-IR) spectra revealed that the HULIS mainly consisted of aliphatic chains, aromatic rings, and carboxylic groups. The FT-IR spectra proved that the aromatic compounds and carboxylic acids dominated the diurnal variation in winter, while carboxylic acids were responsible for that in summer. The normalized oxidative potential of HULIS exhibited an inverse trend with the HULIS-C concentration measured by the DCFH assay. The diurnal reactive oxygen species (ROS) productions from HULIS presents three valleys (03:00-07:00, 10:00-14:00, and 18:00-21:00 LT) in winter but only a single valley (08:00-12:00 LT) in summer. In addition, a positive correlation (R-2 approximate to 0.6, p<0.01) between the oxidative potential and specific ultraviolet absorbance at a wavelength of 254 nm (SUVA254) in winter suggested that the oxidative power of HULIS could be more related to the compounds with high light absorbance, high aromaticity,and molecular weight. The results of this study offer more solid knowledge on the spectral and chemical char- acteristics and oxidative potential of the HULIS in PM2.5 of the typical city in northwest China.
关键词	HULIS Optical properties Diurnal variation Chemical character Oxidative potential
DOI	10.1016/j.atmosenv.2021.118782
关键词[WOS]	HUMIC-LIKE SUBSTANCES ; LIGHT-ABSORPTION PROPERTIES ; PARTICULATE MATTER PM2.5 ; SOLUBLE ORGANIC-MATTER ; PEARL RIVER DELTA ; BROWN CARBON ; ATMOSPHERIC AEROSOLS ; SOURCE APPORTIONMENT ; TEMPORAL VARIATIONS ; GUANZHONG PLAIN
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foun-dation of China[41877383] ; National Natural Science Foun-dation of China[41877376] ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS[SKLLQG1919]
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
项目资助者	National Natural Science Foun-dation of China ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000707012800001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：23[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/361006/17110
专题	粉尘与环境研究室
通讯作者	Shen, Zhenxing
作者单位	1.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710049, Peoples R China 3.Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian 710055, Peoples R China 4.Desert Res Inst, Div Atmospher Sci, Reno, NV 89512 USA
推荐引用方式 GB/T 7714	Zhang, Tian,Huang, Shasha,Wang, Diwei,et al. Seasonal and diurnal variation of PM2.5 HULIS over Xi'an in Northwest China: Optical properties, chemical functional group, and relationship with reactive oxygen species (ROS)[J]. ATMOSPHERIC ENVIRONMENT,2022,268:9.
APA	Zhang, Tian.,Huang, Shasha.,Wang, Diwei.,Sun, Jian.,Zhang, Qian.,...&Shen, Zhenxing.(2022).Seasonal and diurnal variation of PM2.5 HULIS over Xi'an in Northwest China: Optical properties, chemical functional group, and relationship with reactive oxygen species (ROS).ATMOSPHERIC ENVIRONMENT,268,9.
MLA	Zhang, Tian,et al."Seasonal and diurnal variation of PM2.5 HULIS over Xi'an in Northwest China: Optical properties, chemical functional group, and relationship with reactive oxygen species (ROS)".ATMOSPHERIC ENVIRONMENT 268(2022):9.