气候变化领域集成服务门户(CCPortal): Particles liquid water and acidity determine formation of secondary inorganic ions in Urumqi, NW China

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DOI	10.1016/j.atmosres.2021.105622
	Particles liquid water and acidity determine formation of secondary inorganic ions in Urumqi, NW China
	Liu H.; Talifu D.; Ding X.; Wang X.; Abulizi A.; Tursun Y.; An J.; Wang W.; Zhang X.; Zhang Y.
发表日期	2021
ISSN	0169-8095
卷号	260
英文摘要	Secondary atmospheric pollutants are an important component of the particles found in Urumqi city, China, Further, secondary inorganic aerosols, in particular, increase significantly during the winter heating period. In this study, samples collected from October 2017 to August 2018 from Urumqi were analyzed. Results showed that the average concentration of water-soluble inorganic ions (WSIs) in the heating period (86.9 ± 31.1 μg·m−3) was significantly higher than that in the non-heating period (14.1 ± 8.67 μg·m−3). SNA (SO42−, NO3−, NH4+) accounted for 90.7% of the total WSIs (TWSIs) in the heating period. Simulations revealed that the in situ pH (3.1) was higher in the heating period than that in non-heating period (0.66) when they were calculated by the aerosol thermodynamic model. The particles were found to be acidity during the entire period. The liquid water content of the particulates (LWC) was found to higher in the heating period (55.5 ± 51.8 μg·m−3) than the non-heating period (21.3 ± 40.3 μg·m−3). The average nitrogen oxidation rate (NOR) and sulfur oxidation rate (SOR) were 0.16 and 0.36, respectively, indicating a significant secondary formation of nitrate and sulfate in the atmosphere of Urumqi. Further analysis indicated that sulfate was significantly affected by the LWC and acidity of the particulates; nitrate was produced under ammonia-rich conditions in Urumqi, and the LWC facilitated the production of nitrate. This study provides information about the formation of secondary sulfate and nitrate aerosols during different periods in suburban Urumqi. © 2021 Elsevier B.V.
英文关键词	Heating period; PM2.5; Secondary inorganic aerosol; Thermodynamic model; Water content of particulates
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236667
作者单位	College of Chemistry and Chemical Engineer, Xinjiang University, Urumqi, 830046, China; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou, 510640, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou, 510640, China
推荐引用方式 GB/T 7714	Liu H.,Talifu D.,Ding X.,et al. Particles liquid water and acidity determine formation of secondary inorganic ions in Urumqi, NW China[J],2021,260.
APA	Liu H..,Talifu D..,Ding X..,Wang X..,Abulizi A..,...&Zhang Y..(2021).Particles liquid water and acidity determine formation of secondary inorganic ions in Urumqi, NW China.Atmospheric Research,260.
MLA	Liu H.,et al."Particles liquid water and acidity determine formation of secondary inorganic ions in Urumqi, NW China".Atmospheric Research 260(2021).