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	Atmospheric Processing of Loess Particles in a Polluted Urban Area of Northwestern China
	Chen, Yang1,6,7; Liu, Huanwu5; Huang, Ru-Jin1,7; Yang, Fumo4; Tian, Mi6; Yao, Xiaojiang6; Shen, Zhenxing3; Yan, Lulu2; Cao, Junji1,7
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
	2019-07-27
卷号	124期号:14页码:7919-7929
关键词	dust processing single particle urban aging loess
ISSN号	2169-897X
DOI	10.1029/2018JD029956
通讯作者	Yang, Fumo() ; Cao, Junji(cao@loess.llqg.ac.cn)
英文摘要	Loess is an important dust component of airborne particles in Northwestern China. Knowledge of the chemical composition, mixing state, and processing of loess particles in urban plumes is still limited. Urban loess particles were characterized using a single-particle aerosol mass spectrometer. To understand sources and processing of loess particles, source samples from the road, urban background, soil, construction, and biomass burning ash were collected in the urban areas and characterized. Loess particles were determined as a kind of calcium-silicate-rich ones, which were internally mixed with calcium, silicates, potassium, elemental carbon, organics, ammonium, sulfate, and nitrate. Road and soil were major sources of loess particles. Among the aged loess particles, the average peak areas of taken-up nitrate and sulfate were comparable to that of (Fe+Ca+Al). Diurnal uptake profiles of chloride, sulfate, oxalate, and nitrate on loess particles were analyzed. The nocturnal elevation of chloride occurred significantly due to the uptake of HCl (g). Nighttime nitrate formation occurred prevalently under high relative humidity conditions via the heterogeneous hydrolysis of N2O5. The nighttime enrichment of oxalate, which is a marker for aqueous-formatted secondary organic aerosol, was also found. Besides the nighttime chemistry, the daytime photochemical activities were also a drive for the elevations of sulfate, nitrate, and ammonium. Conclusively, the processing of loess particles in polluted urban plumes significantly altered their chemical composition and mixing state.
资助项目	National Natural Science Foundation of China[41703136] ; National Key Research and Development Program of China[2016YFC0200405]
WOS关键词	SECONDARY ORGANIC AEROSOL ; MIXING STATE ; MINERAL DUST ; CHEMICAL-CHARACTERIZATION ; HETEROGENEOUS CHEMISTRY ; INDIVIDUAL PARTICLES ; MASS SPECTROMETERS ; SINGLE PARTICLES ; WATER-ADSORPTION ; GUANZHONG BASIN
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000481444200027
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/13626]
专题	地球环境研究所_粉尘与环境研究室
通讯作者	Yang, Fumo; Cao, Junji
作者单位	1.Chinese Acad Sci, Inst Earth Environm, KLACP, Xian, Shaanxi, Peoples R China 2.Xian Univ Architecture & Technol, Dept Environm & Municipal Engn, Xian, Shaanxi, Peoples R China 3.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian, Shaanxi, Peoples R China 4.Sichuan Univ, Natl Engn Res Ctr Flue Gas Desulfurizat, Sch Architecture & Environm, Chengdu, Sichuan, Peoples R China 5.Xian Environm Monitor Stn, Xian, Shaanxi, Peoples R China 6.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing, Peoples R China 7.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Chen, Yang,Liu, Huanwu,Huang, Ru-Jin,et al. Atmospheric Processing of Loess Particles in a Polluted Urban Area of Northwestern China[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(14):7919-7929.
APA	Chen, Yang.,Liu, Huanwu.,Huang, Ru-Jin.,Yang, Fumo.,Tian, Mi.,...&Cao, Junji.(2019).Atmospheric Processing of Loess Particles in a Polluted Urban Area of Northwestern China.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(14),7919-7929.
MLA	Chen, Yang,et al."Atmospheric Processing of Loess Particles in a Polluted Urban Area of Northwestern China".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.14(2019):7919-7929.

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