Oxidative Potential of Water-Soluble Matter Associated with Chromophoric Substances in PM2.5 over Xi'an, China

doi:10.1021/acs.est.9b01976

IEECAS OpenIR > 粉尘与环境研究室

	Oxidative Potential of Water-Soluble Matter Associated with Chromophoric Substances in PM2.5 over Xi'an, China
	Chen, Qingcai 1; Wang, Mamin 1; Wang, Yuqin 1,2; Zhang, Lixin 1; Li, Yanguang 3,4; Han, Yuemei 5
通讯作者	Chen, Qingcai(chenqingcai@sust.edu.cn)
	2019-08-06
发表期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN	0013-936X
卷号	53 期号:15 页码:8574-8584
摘要	Organic compounds are important contributors to the oxidative potential (OP) of atmospheric aerosols. This study is the first to report the OP of water-soluble organic matter (WSOM) related to the chromophoric substances in PM2.5 over Xi'an, China. The dithiothreitol (DTT) activity levels in PM2.5 extracted by water were quantified as well as the relationships between DTT activity and light absorption and fluorescence properties. The results show that the DTT activity has significantly correlated with colored WSOM, in which we identified three light absorbing substances (BrC1-3) and eight fluorescent substances (C1-8). It is further found that BrC3 and C7 accounted for almost all of the DTT activity by colored WSOM, although these two factors contributed only a small fraction of light absorption and fluorescence. BrC3 and C7 are clearly distinguished from other chromophoric substances because of their long absorption wavelength (lambda(max) = 475 nm) and fluorescence emission wavelength (lambda(max) = 462 nm), respectively. This discovery will help to better interpret and understand the mechanism of oxidation activity generation by light absorbing organic aerosols and provide guidance for predicting the OPs of light absorbing organic aerosols based on their optical properties.
DOI	10.1021/acs.est.9b01976
关键词[WOS]	DISSOLVED ORGANIC-MATTER ; HUMIC-LIKE SUBSTANCES ; AIRBORNE PARTICULATE MATTER ; AMBIENT AIR-POLLUTION ; LOS-ANGELES ; FLUORESCENCE SPECTROSCOPY ; DITHIOTHREITOL DTT ; CHEMICAL-COMPOSITION ; LIGHT-ABSORPTION ; REDOX ACTIVITY
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[41877354] ; National Natural Science Foundation of China[41703102] ; Nature Science Foundation of Shaanxi Province, China[2018JM4011]
WOS研究方向	Engineering ; Environmental Sciences & Ecology
项目资助者	National Natural Science Foundation of China ; Nature Science Foundation of Shaanxi Province, China
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:000480370600012
出版者	AMER CHEMICAL SOC
引用统计	被引频次：66[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/361006/13568
专题	粉尘与环境研究室
通讯作者	Chen, Qingcai
作者单位	1.Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Shaanxi, Peoples R China 2.St Louis Univ, Dept Earth & Atmospher Sci, St Louis, MO 63108 USA 3.MLR, Key Lab Study Focused Magmatism & Giant Ore Depo, Xian 710054, Shaanxi, Peoples R China 4.China Geol Survey, Xian Ctr Geol Survey, Xian 710054, Shaanxi, Peoples R China 5.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Chen, Qingcai,Wang, Mamin,Wang, Yuqin,et al. Oxidative Potential of Water-Soluble Matter Associated with Chromophoric Substances in PM2.5 over Xi'an, China[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2019,53(15):8574-8584.
APA	Chen, Qingcai,Wang, Mamin,Wang, Yuqin,Zhang, Lixin,Li, Yanguang,&Han, Yuemei.(2019).Oxidative Potential of Water-Soluble Matter Associated with Chromophoric Substances in PM2.5 over Xi'an, China.ENVIRONMENTAL SCIENCE & TECHNOLOGY,53(15),8574-8584.
MLA	Chen, Qingcai,et al."Oxidative Potential of Water-Soluble Matter Associated with Chromophoric Substances in PM2.5 over Xi'an, China".ENVIRONMENTAL SCIENCE & TECHNOLOGY 53.15(2019):8574-8584.