Volatile organic compounds in a typical petrochemical industrialized valley city of northwest China based on high-resolution PTR-MS measurements: Characterization, sources and chemical effects

Zhou, Xi; Li, Zhongqin; Zhang, Tinjun; Wang, Fanglin; Wang, Feiteng; Yan, Tao; Zhang, Xin; Wang, Fanglong; Huang, Ju

doi:10.1016/j.scitotenv.2019.03.283

Cited by 78 publications

(24 citation statements)

References 77 publications

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“…The "RO x cycle", is usually started by the formation of OH, and then forms a radical cycle as "OH→RO 2 →RO→ HO 2 →OH" as illustrated in Fig. 6 (Hui et al, 2020), Shanghai (Su, 2012), Beijing (Zhang et al, 2020b), Guangzhou (Zou et al, 2015) and formaldehyde (d), acetaldehyde (e), and acetone (f) in Lanzhou (Zhou et al, 2019), Beijing (Liu et al, 2015b), Shanghai (unpublished data from this study), and Shenzhen (Huang et al, 2020). et al, 2012).…”

Section: Photochemical Characteristics 41 Roles In the Photochemical Reactionsmentioning

confidence: 99%

Spatial and Temporal Distributions and Sources of Anthropogenic NMVOCs in the Atmosphere of China: A Review

Wang

et al. 2021

Adv. Atmos. Sci.

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As the key precursors of O 3 , anthropogenic non-methane volatile organic compounds (NMVOCs) have been studied intensively. This paper performed a meta-analysis on the spatial and temporal variations of NMVOCs, their roles in photochemical reactions, and their sources in China, based on published research. The results showed that both nonmethane hydrocarbons (NMHCs) and oxygenated VOCs (OVOCs) in China have higher mixing ratios in the eastern developed cities compared to those in the central and western areas. Alkanes are the most abundant NMHCs species in all reported sites while formaldehyde is the most abundant among the OVOCs. OVOCs have the highest mixing ratios in summer and the lowest in winter, which is opposite to NMHCs. Among all NMVOCs, the top eight species account for 50%−70% of the total ozone formation potential (OFP) with different compositions and contributions in different areas. In devolved regions, OFP-NMHCs are the highest in winter while OFP-OVOCs are the highest in summer. Based on positive matrix factorization (PMF) analysis, vehicle exhaust, industrial emissions, and solvent usage in China are the main sources for NMHCs. However, the emission trend analysis showed that solvent usage and industrial emissions will exceed vehicle exhaust and become the two major sources of NMVOCs in near future. Based on the meta-analysis conducted in this work, we believe that the spatio-temporal variations and oxidation mechanisms of atmospheric OVOCs, as well as generating a higher spatial resolution of emission inventories of NMVOCs represent an area for future studies on NMVOCs in China.

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Section: Photochemical Characteristics 41 Roles In the Photochemical Reactionsmentioning

confidence: 99%

Spatial and Temporal Distributions and Sources of Anthropogenic NMVOCs in the Atmosphere of China: A Review

Wang

et al. 2021

Adv. Atmos. Sci.

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“…The multi-component gas standards (Linde Spectra Environment Gases, Alpha, NJ, USA) were dynamically diluted to calibrate the PTR-ToF-MS and the standard curves of 12 VOCs were obtained (benzene, toluene, styrene, ethylbenzene, 1,3,5-trimethylbenzene, methyl ethyl ketone (MEK), ethyl ketone, methyl isobutyl ketone, isopropyl alcohol, acetone, acrolein, and propylene). The concentrations of compounds that have not been calibrated were determined based on the transmission curve coefficients (de Gouw and Warneke 2007, Taipale et al 2008), applying the transmission tool of the PTR-MS Viewer-Version 3.2 (Zhou et al 2019). Regular pollutants and meteorological parameters were measured synchronously.…”

Section: Ptr-tof-ms Measurementsmentioning

confidence: 99%

Evaluation of the VOC pollution pattern and emission characteristics during the Beijing resurgence of COVID-19 in summer 2020 based on the measurement of PTR-ToF-MS

Zhang

Man

Duan

et al. 2022

Environ. Res. Lett.

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A second wave of coronavirus disease 2019 (COVID-19) infections have emerged in summer Beijing, 2020, which provided an opportunity to explore the response of air pollution to reduced human activity. Proton-Transfer-Reaction Time-of-Flight Mass Spectrometry (PTR-ToF-MS) coupled with Positive Matrix Factorization (PMF) source apportionment were applied to evaluate the pollution pattern and capture the detailed dynamic emission characteristics of volatile organic compounds (VOCs) during the representative period with the occurrence of O3 pollution episodes and the Beijing resurgence of COVID-19. The level of anthropogenic VOC was lower than the same period of previous years due to the pandemic and emission reduction measures. More than two-thirds of the observation period were identified as high-O3 days and VOCs exhibited higher mixing ratios and faster consumption rates in the daytime under high-O3 days. The identified VOC emission sources and the corresponding contributions during the whole observation period included: vehicle + fuel (12.41 ± 9.43%), industrial process (9.40 ± 8.65%), solvent usage (19.58 ± 13.46%), biogenic (6.03 ± 5.40%), background + long-lived (5.62 ± 11.37%), and two groups of oxygenated VOC (OVOC) factors (primary emission and secondary formation, 26.14 ± 15.20% and 20.84 ± 14.0%, respectively). Refined dynamic source apportionment results show that the “stay at home” tendency led to decreased emission (- 34.47 ± 1.90 %) and weakened morning peak of vehicle + fuel during the Beijing resurgence. However, growing emission of primary OVOCs (+ 51.10 ± 8.28%) with similar diurnal variation was observed in the new outbreak and afterwards, which might be related to the enhanced usage of pandemic products. The present study illustrated that more stringent VOC reduction measures towards pandemic products should be carried out to achieve the balanced emission abatement of NOx and VOC when adhering to regular epidemic prevention and control measures.

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“…The ozone formation potential (OFP) is commonly used to measure the ability of VOCs to produce ozone (Liang et al, 2020;Wang et al, 2020a, b). Therefore, the maximum VOC incremental reaction activity method was followed to study the contribution of VOCs to ozone formation (Yang et al, 2019;Zhou et al, 2019;Niu et al, 2021). The formula for calculating the OFP of a single VOC species is as follows3:…”

Section: Ozone Formation Potentialmentioning

confidence: 99%

Characterization, source apportionment, and assessment of volatile organic compounds in a typical urban area of southern Xinjiang, China

Liu

et al. 2021

Air Qual Atmos Health

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Previous studies on the characteristics, reactivity, and source distribution of volatile organic compounds (VOCs) mainly focused on large cities, while information regarding the source characteristics of VOCs in underdeveloped areas remains insufficient. Therefore, this study explored the concentration characteristics, source apportionment, and multiple effect pollution assessment of 106 VOCs observed from November 2019 to October 2020 in urban Tumushuke. Tumushuke is located in western China and is a representative city of southern Xinjiang. The results showed that the average VOCs concentration was 93.49 μg/m 3 . Alkanes (40.84 μg/m 3 ) accounted for the largest proportion, followed by oxygen-containing compounds (21.06 μg/m 3 ), halohydrocarbons (16.41 μg/m 3 ), arenes (10.14 μg/m 3 ), alkenes (3.51 μg/m 3 ), and acetylene (1.52 μg/m 3 ). Five main sources were identified based on the positive matrix factorization (PMF) model results: coal/biomass combustion (30.89%), transportation (26.06%), volatile solvents and fuels (18.43%), industry (12.76%), and plant emissions (11.86%). Alkanes, arenes, and alkenes exhibited the highest O 3 formation potential, accounting for 40.60%, 26.14%, and 17.65%, respectively. Secondary organic aerosol formation was dominated by arenes, with the contribution rate reaching 96.67%. Halohydrocarbons and arenes significantly contributed to the toxic effects on the environment, accounting for 43.64% and 27.97%, respectively. Based on the multi-effect assessment, arenes and alkanes made the greatest contribution to the overall environmental impact, accounting for 54.72% and 20.10%, respectively. This study provides evidence to support local governments in formulating VOC control strategies in the future. Keywords Volatile organic compounds • Source apportionment • Ozone formation potential • Secondary organic aerosol potential • Multiple effect assessment HighlightsThe current status of VOCs in southern Xinjiang. VOCs based on multi-dimensional evaluation. Arenes provided the greatest contributions to the comprehensive environmental impact.

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Volatile organic compounds in a typical petrochemical industrialized valley city of northwest China based on high-resolution PTR-MS measurements: Characterization, sources and chemical effects

Cited by 78 publications

References 77 publications

Spatial and Temporal Distributions and Sources of Anthropogenic NMVOCs in the Atmosphere of China: A Review

Spatial and Temporal Distributions and Sources of Anthropogenic NMVOCs in the Atmosphere of China: A Review

Evaluation of the VOC pollution pattern and emission characteristics during the Beijing resurgence of COVID-19 in summer 2020 based on the measurement of PTR-ToF-MS

Characterization, source apportionment, and assessment of volatile organic compounds in a typical urban area of southern Xinjiang, China

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