Corrigendum to “Ambient volatile organic compounds and their effect on ozone production in Wuhan, central China” [Sci. Total Environ. 541 (2016) 200–209]

Lyu, Xiaopu; Chen, N.; Guo, Hai; Zhang, W.H.; Wang, N.; Wang, Y.; Liu, M.

doi:10.1016/j.scitotenv.2016.01.168

Cited by 9 publications

(2 citation statements)

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“…In general, the difference of NMHC emission sources is the key factor determining the distribution of NMHC concentration in Lanzhou. Compared with other cities, the concentration of atmospheric NMHCs in the non-industrial area of Lanzhou was close to those reported in Beijing [25], Nanjing (48.17 ± 16.01 ppbv) [26], Wuhan (23.3 ± 0.5 ppbv) [27] and Shanghai (28.9 ppbv) [28]. However, the level of NMHCs in industrial hubs in Lanzhou (S1 site) during the sampling period was higher than that of many Chinese cities.…”

Section: General Characteristics Of Nmhcssupporting

confidence: 69%

The Characteristics of Ambient Non-Methane Hydrocarbons (NMHCs) in Lanzhou, China

et al. 2019

Atmosphere

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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 with relatively high contributions to ozone formation. Aromatics and high carbon alkanes were major contributors to SOA formation potential (SOAp) (i.e., toluene, m,p-xylene, dodecane, undecane, n-tanane, benzene and ethylbenzene) in Lanzhou. Based on the specific volatile organic compounds (VOCs) ratio method and the PCA modem, the observation sites in Lanzhou were greatly affected by the surrounding industrial areas. The sources consisted of petrochemical industry, vehicle emissions, solvent usage and combustion sources, which contributed to 33.9%, 31.6%, 19.2% and 7.9% of the total monitored NMHCs, respectively. From different sites, though the influence of regional transport was not very significant on the whole, it also affected the NMHCs of nonindustrial areas based on the ratio of xylene to ethyl-benzene (X/E), especially the S4 site; vehicle emission was less important compared to sources from petrochemical industries in S1, as characterized by relatively higher toluene to benzene (T/B) ratios. However, vehicle emission has significant influence on NMHCs in S4. Overall, local emissions are the main source of NMHCs in Lanzhou and the petrochemical industry has a great influence on the distribution of NMHCs in the whole region.

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Section: General Characteristics Of Nmhcssupporting

confidence: 69%

The Characteristics of Ambient Non-Methane Hydrocarbons (NMHCs) in Lanzhou, China

et al. 2019

Atmosphere

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“…At the YX site, the VOCs were continuously sampled and measured using TH-300B (Wuhan Tianhong Instrument Co., Ltd., Wuhan, China), an online monitoring system with a temporal resolution of 1 h. The sampling and analysis procedures are described only briefly here since they are described in detail elsewhere [33]. To analyze the VOCs separately, two channels were installed.…”

Section: Observational Instrumentationmentioning

confidence: 99%

VOC Characteristics and Their Source Apportionment in the Yangtze River Delta Region during the G20 Summit

et al. 2021

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To evaluate the effectiveness of measures to reduce the levels of volatile organic compounds (VOCs), which are important precursors of ground-level ozone formation, the real-time monitoring data of VOCs at the urban Zhaohui supersite (ZH), the Dianshan Lake regional supersite (DSL) and the urban Yixing station (YX) in the Yangtze River Delta region were analyzed from 23 August to 15 September 2016 during the G20 Hangzhou Summit. The average mole ratios of VOCs at the three sites were 6.56, 21.33 and 19.62 ppb, respectively, which were lower than those (13.65, 27.72 and 21.38 ppb) after deregulation. The characteristics of the VOCs varied during the different control periods. Synoptic conditions and airmass transport played an important role in the transport and accumulation of VOCs and other pollutants, which affected the control effects. Using the positive matrix factorization (PMF) method in source apportionment, five factors were identified, namely, vehicle exhaust (19.66–31.47%), plants (5.59–17.07%), industrial emissions (13.14–33.82%), fuel vaporization (12.83–26.34%) and solvent usage (17.84–28.95%) for the ZH and YX sites. Factor 4 was identified as fuel vaporization + incomplete combustion (21.69–25.35%) at the DSL site. The Non-parametric Wind Regression (NWR) method showed that regional transport was the main factor influencing the VOC distribution.

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Chemical characteristics and source apportionment of PM2.5 in Wuhan, China

Fan

Zhou

Chen³

et al. 2019

J Atmos Chem

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Corrigendum to “Ambient volatile organic compounds and their effect on ozone production in Wuhan, central China” [Sci. Total Environ. 541 (2016) 200–209]

Cited by 9 publications

References 0 publications

The Characteristics of Ambient Non-Methane Hydrocarbons (NMHCs) in Lanzhou, China

The Characteristics of Ambient Non-Methane Hydrocarbons (NMHCs) in Lanzhou, China

VOC Characteristics and Their Source Apportionment in the Yangtze River Delta Region during the G20 Summit

Chemical characteristics and source apportionment of PM2.5 in Wuhan, China

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