Characterization and sources of volatile organic compounds (VOCs) and their related changes during ozone pollution days in 2016 in Beijing, China

Liu, Yafei; Song, Mengdi; Liu, Xingang; Zhang, Yuepeng; Hui, Lirong; Kong, Liuwei; Zhang, Yingying; Zhang, Chen; Yu, Qian; An, Junling; Ma, Depeng; Tan, Qinwen; Feng, Miao

doi:10.1016/j.envpol.2019.113599

Cited by 175 publications

(47 citation statements)

References 89 publications

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“…In addition to comparisons with global and Chinese background sites, comparisons have also been made with other Chinese cities. In 2010, concentrations of CFC-11 and CFC-12 monitored in Beijing were 377 pptv and 649 pptv, respectively [25], while the concentration of CFC-11 continuously measured online in Beijing during 2016 was 590 pptv [27]. Compared with Beijing, the concentration of CFC-11 in TA, JN, and GR was significantly lower.…”

Section: Cfcs In Residential Sitesmentioning

confidence: 96%

Monitoring Chlorofluorocarbons in Potential Source Regions in Eastern China

Zhen

Yang

Zhou³

et al. 2020

Atmosphere

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Recent studies have indicated that Eastern China might be a potential source region of increased atmospheric chlorofluorocarbons (CFCs). To investigate this possibility, a field measurement was carried out from October to December 2017 for identifying the ambient concentration levels of representative trichlorofluoromethane (CFC-11), dichlorodifluoromethane (CFC-12), trifluorotrichloroethane (CFC-113), and tetrafluorodichloroethane (CFC-114) at the residential and municipal solid waste (MSW) landfills and industrial sites in Eastern China. The ambient mixing ratios of CFCs at residential sites were almost within 20% enhancement of the global background sites. The highest levels of CFCs were observed at the MSW landfill sites. Moreover, CFC-11 and CFC-113 concentrations at MSW landfills, which were in service, were two times higher than that at completed MSW landfills. Mean concentrations of 322 pptv for CFC-11, 791 pptv for CFC-12, 91 pptv for CFC-113, and 16 pptv for CFC-114 at various industrial sites were higher than that at residential sites, but they were obviously lower than that at MSW landfills in use. A poor intercorrelation between the CFCs indicated that they did not come from the same sources. Higher concentrations measured in this study compared with background sites indicates that MSW landfills could be an unintentional emission source and there are still substantial amounts of CFCs being stored in banks that may discharge CFCs into the atmosphere in Eastern China.

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Section: Cfcs In Residential Sitesmentioning

confidence: 96%

Monitoring Chlorofluorocarbons in Potential Source Regions in Eastern China

Zhen

Yang

Zhou³

et al. 2020

Atmosphere

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“…Cluster analyses of backward trajectories are widely used to determine a dominant air mass direction and potential origin direction of pollutants at the study sites (Hong et al, 2019;Liu et al, 2016aLiu et al, , 2019. In this study, the 24 h backward trajectories (1 h intervals) of air masses arriving 100 m above ground level were calculated using the MeteoInfoMap software.…”

Section: Cluster and Potential Source Contribution Function (Pscf) Anmentioning

confidence: 99%

Spatiotemporal variation, sources, and secondary transformation potential of volatile organic compounds in Xi'an, China

Song

Yang

et al. 2021

Atmos. Chem. Phys.

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Abstract. As critical precursors of ozone (O3) and secondary organic aerosols, volatile organic compounds (VOCs) play a vital role in air quality, human health, and climate change. In this study, a campaign of comprehensive field observations and VOC grid sampling was conducted in Xi'an, China, from 20 June to 20 July 2019 to identify the spatiotemporal concentration levels, sources, and secondary transformation potential of VOCs. During the observation period, the average VOC concentrations at the Chanba (CB), Di Huan Suo (DHS), Qinling (QL), and gridded sampling sites were 27.8 ± 8.9, 33.8 ± 10.5, 15.5 ± 5.8, and 29.1 ± 8.4 ppb, respectively. Vehicle exhaust was the primary source of VOC emissions in Xi'an, and the contributions of vehicle exhaust to VOCs at the CB, DHS, and QL sites were 41.3 %, 30.6 %, and 23.6 %–41.4 %, respectively. While industrial emissions were the second-largest source of VOCs in urban areas, contributions from aging sources were high in rural areas. High potential source contribution function values primarily appeared in eastern and southern Xi'an near the sampling site, which indicates that Xi'an exhibits a strong local VOC source. Moreover, alkenes, aromatics, and oxygenated VOCs played a dominant role in secondary transformation, which is a major concern in reducing O3 pollution in Xi'an.

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“…For more than two decades, PMF has been widely used to identify and quantify major sources of VOCs (He et al, 2019;Li et al, 2015;Miller et al, 2002;Pallavi et al, 2019;Song et al, 2007;Yuan et al, 2010). The definition and usage of the PMF model is described elsewhere in detail (Liu et al, 2020;Song et al, 2018;Su et al, 2019), and only a brief description is provided here.…”

Section: Positive Matrix Factorization (Pmf)mentioning

confidence: 99%

“…PSCF is a gridded statistical analysis method that is used to combine the backward trajectory and the corresponding VOC concentration to determine the potential VOC source area (Liu et al, 2016b;Liu et al, 2020;Zheng et al, 2018). In this study,…”

Section: Cluster and Potential Source Contribution Function (Pscf) Analysismentioning

confidence: 99%

Spatiotemporal Variation, Sources, and Secondary Transformation Potential of VOCs in Xi’an, China

Song¹,

Li²,

Yang³

et al. 2020

Preprint

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Abstract. As a critical precursors of ozone (O3) and secondary organic aerosols, volatile organic compounds (VOCs) play a vital role in air quality, human health, and climate change. In this study, a campaign of comprehensive field observations and VOC grid sampling was conducted in Xi’an, China from June 20 to July 20, 2019 to identify the spatiotemporal concentration levels, sources, and secondary transformation potential of VOCs. During the observation period, the average VOC concentrations at the Chanba (CB), Di Huan Suo (DHS), Qinling (QL), and gridded sampling sites were 27.8 ± 8.9, 33.8 ± 10.5, 15.5 ± 5.8, and 29.1 ± 8.4 ppb, respectively. Vehicle exhaust was the primary source of VOC emissions in Xi’an, and the contributions of vehicle exhaust to VOCs at the CB, DHS, and QL sites were 41.3 %, 30.6 %, and 23.6–41.4 %, respectively. While industrial emissions were the second-largest source of VOCs in urban areas, contributions from ageing sources were high in rural areas. High potential source contribution function values primarily appeared in eastern and southern Xi’an near the sampling site, which indicates that Xi'an exhibits a strong local VOC source. Moreover, alkenes, aromatics, and oxygenated VOCs played a dominant role in secondary transformation, which is a major concern in reducing O3 pollution in Xi’an.

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Characterization and sources of volatile organic compounds (VOCs) and their related changes during ozone pollution days in 2016 in Beijing, China

Cited by 175 publications

References 89 publications

Monitoring Chlorofluorocarbons in Potential Source Regions in Eastern China

Monitoring Chlorofluorocarbons in Potential Source Regions in Eastern China

Spatiotemporal variation, sources, and secondary transformation potential of volatile organic compounds in Xi'an, China

Spatiotemporal Variation, Sources, and Secondary Transformation Potential of VOCs in Xi’an, China

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