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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. | |
| Date Issued | 2021 |
| ISSN | 0169-8095 |
| Volume | 260 |
| Other Abstract | 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. |
| enkeywords | Heating period; PM2.5; Secondary inorganic aerosol; Thermodynamic model; Water content of particulates |
| journal | Atmospheric Research
 |
| Document Type | 期刊论文 |
| Identifier | http://gcip.llas.ac.cn/handle/2XKMVOVA/236667 |
| Affiliation | 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 |
| Recommended Citation 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). |
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