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The Characteristics of Ambient Non-Methane Hydrocarbons (NMHCs) in Lanzhou, China by Wu, Yajun; Hu, Jun; Wang, Han; Li, Hui; Zhang, Hefeng; Chai, Fahe; Wang, Shulan is a Environmental Science article available to read on EtoBox.

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Non-methane hydrocarbons (NMHCs) from four sampling sites in Lanzhou, a petrochemical industrialized city in northwest China, was sampled by stainless steel canisters and measured by gas chromatography–mass selective detection/flame ionization detection (GC–MSD/FID) in May and June of 2017. Based on these results, the contributions of NMHCs to the ozone (O3) and secondary organic aerosols (SOA), differences in tracer ratios, and source apportionment by principal component analysis (PCA) were analyzed. The results showed that the total NMHCs concentration in Lanzhou was 48.4 ± 48.3 ppbv (parts per billion by volume) during the observation and it was higher in May (78.6 ppbv) than in June (37.8 ppbv); the highest NMHCs concentration was observed in industrial areas. Alkanes were the dominant group at all sites in Lanzhou and account for more than 60% of the NMHCs, while isopentane, n-butane n-pentane, propane and ethane were the major compounds. Additionally, the NMHCs in Lanzhou have made great contributions to O3 and SOA generation and the S1 site of the industrial area contributed the most to both of them. Propene, toluene, ethylbenzene and n-pentane were found to be more reactive

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Author

Wu, Yajun; Hu, Jun; Wang, Han; Li, Hui; Zhang, Hefeng; Chai, Fahe; Wang, Shulan

Publisher

Korean Meteorological Society; MDPI AG; Rotoweb Cantelli; Basel: MDPI AG, 2010- (ISSN 2073-4433)

Published

2019

Language

EN

Field

Environmental Science (Physical Sciences)