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

doi:10.1021/acs.est.9b01976

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	Oxidative Potential of Water-Soluble Matter Associated with Chromophoric Substances in PM2.5 over Xi'an, China
	Chen, Qingcai 2; Wang, Mamin 2; Wang, Yuqin 1,2; Zhang, Lixin 2; Li, Yanguang 3,4; Han, Yuemei 5
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2019-08-06
卷号	53 期号:15 页码:8574-8584
ISSN号	0013-936X
DOI	10.1021/acs.est.9b01976
通讯作者	Chen, Qingcai(chenqingcai@sust.edu.cn)
英文摘要	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.
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关键词	DISSOLVED ORGANIC-MATTER ; HUMIC-LIKE SUBSTANCES ; AIRBORNE PARTICULATE MATTER ; AMBIENT AIR-POLLUTION ; LOS-ANGELES ; FLUORESCENCE SPECTROSCOPY ; DITHIOTHREITOL DTT ; CHEMICAL-COMPOSITION ; LIGHT-ABSORPTION ; REDOX ACTIVITY
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000480370600012
资助机构	National Natural Science Foundation of China ; Nature Science Foundation of Shaanxi Province, China
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/13567]
专题	地球环境研究所_粉尘与环境研究室
通讯作者	Chen, Qingcai
作者单位	1.St Louis Univ, Dept Earth & Atmospher Sci, St Louis, MO 63108 USA 2.Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Shaanxi, Peoples R China 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.