| Title: | Multisize particulate matter and volatile organic compounds in arid and semiarid areas of Northwest China |
| Author(s): | Zhou X; Li Z; Zhang T; Wang F; Tao Y; Zhang X; |
| Address: | "Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources; Tianshan Glaciological Station, Chinese Academy of Sciences, Lanzhou, 730000, China. State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources; Tianshan Glaciological Station, Chinese Academy of Sciences, Lanzhou, 730000, China; College of Sciences, Shihezi University, Xinjiang, 832000, China; College of Geography and Environmental Science, Northwest Normal University, Lanzhou, 730000, China. Electronic address: lizq@lzb.ac.cn. Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China. State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources; Tianshan Glaciological Station, Chinese Academy of Sciences, Lanzhou, 730000, China" |
| DOI: | 10.1016/j.envpol.2022.118875 |
| ISSN/ISBN: | 1873-6424 (Electronic) 0269-7491 (Linking) |
| Abstract: | "To investigate the chemical components, sources, and interactions of particulate matter (PM) and volatile organic compounds (VOCs), a field campaign was implemented during the spring of 2018 in nine cities in northwestern (NW) China. PM was mainly contributed by organic matter and water-soluble inorganic ions (41% for PM(10) and approximately 60% for PM(2.5) and PM(1)). Two typical haze patterns were observed: anthropogenic pollution type (AP-type), wherein contributions of sulfate, nitrate, and ammonium (SNA) increased, and dust pollution type (DP-type), wherein contributions of Ca(2+) increased and SNA decreased. Source appointment suggested that regional sources contributed close to half to PM(2.5) pollution (40% for AP-type and 50% for DP-type). Thus, sources from regional transport are also important for haze and dust pollution. The ranking of VOC concentrations was methanol > acetaldehyde > formic acid + ethanol > acetone. Compared with other cities, there are higher oxygenated VOCs (OVOCs) and lower aromatics in NW China. The relationships between VOCs and PM were discussed. The dominating secondary organic aerosols (SOA) formation potential precursors were C(10)-aromatics, xylene, and styrene under low-nitrogen oxide (NOx) conditions, and benzene, C(10)-aromatics, and toluene dominated under high-NOx conditions. The quadratic polynomial was the most suitable fitting model for their correlation, and the results suggested that VOC oxidations explained 6.1-10.8% and 9.9-20.7% of SOA formation under high-NOx and low-NOx conditions, respectively" |
| Keywords: | Aerosols/analysis *Air Pollutants/analysis China Environmental Monitoring Particulate Matter/analysis Seasons *Volatile Organic Compounds/analysis Black carbon NW China Ptr-ms Particulate matter Volatile organic compounds; |
| Notes: | "MedlineZhou, Xi Li, Zhongqin Zhang, Tingjun Wang, Feiteng Tao, Yan Zhang, Xin eng England 2022/01/26 Environ Pollut. 2022 May 1; 300:118875. doi: 10.1016/j.envpol.2022.118875. Epub 2022 Jan 21" |
