A newly integrated dataset of volatile organic compounds (VOCs) source profiles and implications for the future development of VOCs profiles in China

Sha, Qing’e; Zhu, Manni; Huang, Huei-Ping; Wang, Yuzheng; Huang, Zhijiong; Zhang, Xue-Chi; Tang, Ming-Shuang; Lu, Menghua; Chen, Cheng; Shi, Bowen; Chen, Zixi; Wu, Lili; Zhong, Zhuangmin; Li, Cheng; Xu, Yuanqian; Yu, Fei; Jia, Guanglin; Liao, Shaowei; Cui, Xiaozhen; Liu, Junwen; Zheng, Junyu

doi:10.1016/j.scitotenv.2021.148348

Cited by 90 publications

(24 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, we observe a downward trend for emission factors of gasoline vehicles from China I to China VI emission standards for the four representative VOC species. This is consistent with the results in previous studies with lower emissions for newer emission standards (Wang et al, 2017;Sha et al, 2021). In addition, the dependence of VOC emissions on emission standards may also be attributed to the history of vehicle usage, i.e., the mileage traveled by the vehicles, as lower mileage vehicles are usually associated with vehicles with newer emission standards.…”

Section: Characteristics Of the Voc Emissions In The Vehiclessupporting

confidence: 91%

“…Moreover, there are still a large number of unidentifiable compounds in diesel vehicles (May et al, 2014). Furthermore, VOC emissions from vehicles significantly decreased in China due to stricter emission standards (Liu et al, 2017;Sha et al, 2021). In order to reduce emissions of most primary pollutants, more stringent emission standards and after-treatment devices have been implemented.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Oxygenated volatile organic compounds (VOCs) as significant but varied contributors to VOC emissions from vehicles

Wang

Yuan

et al. 2022

Atmos. Chem. Phys.

Self Cite

View full text Add to dashboard Cite

Abstract. Vehicular emissions are an important source for volatile organic compounds (VOCs) in urban and downwind regions. In this study, we conducted a chassis dynamometer study to investigate VOC emissions from vehicles using gasoline, diesel, and liquefied petroleum gas (LPG) as fuel. Time-resolved VOC emissions from vehicles are chemically characterized by a proton-transfer-reaction time-of-flight mass spectrometer (PTR-ToF-MS) with high frequency. Our results show that emission factors of VOCs generally decrease with the improvement of emission standards for gasoline vehicles, whereas variations in emission factors for diesel vehicles with emission standards are more diverse. Mass spectrum analysis of the PTR-ToF-MS suggests that cold starts significantly influence VOC emissions of gasoline vehicles, while the influences are less important for diesel vehicles. Large differences in VOC emissions between gasoline and diesel vehicles are observed with emission factors of most VOC species from diesel vehicles being higher than gasoline vehicles, especially for most oxygenated volatile organic compounds (OVOCs) and heavier aromatics. These results indicate quantification of heavier species by the PTR-ToF-MS may be important in the characterization of vehicular exhausts. Our results suggest that VOC pairs (e.g., C14 aromatics / toluene ratio) could potentially provide good indicators for distinguishing emissions from gasoline and diesel vehicles. The fractions of OVOCs in total VOC emissions are determined by combining measurements of hydrocarbons from canisters and online observations of the PTR-ToF-MS. We show that OVOCs contribute 9.4 % ± 5.6 % of total VOC emissions for gasoline vehicles, while the fractions are significantly higher for diesel vehicles (52 %–71 %), highlighting the importance of detecting these OVOC species in diesel emissions. Our study demonstrated that the large number of OVOC species measured by the PTR-ToF-MS are important in the characterization of VOC emissions from vehicles.

show abstract

Section: Characteristics Of the Voc Emissions In The Vehiclessupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Oxygenated volatile organic compounds (VOCs) as significant but varied contributors to VOC emissions from vehicles

Wang

Yuan

et al. 2022

Atmos. Chem. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Volatile organic compounds (VOCs) are mainly emitted from anthropogenic sources such as fossil fuel, paints, compressed aerosol, and biomass combustion, which have been recognized as critical precursors for tropospheric ozone and secondary organic aerosols (SOAs) [ 1 , 2 , 3 , 4 ]. Environmental problems generated by VOCs can also cause direct harm to respiratory, allergic, or immune systems of human beings, and even cancer in organs [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of ZnO/WO3 Nanocomposite Porous Films for High-Performance Gas Sensing of Multiple VOCs

et al. 2023

View full text Add to dashboard Cite

Volatile organic compounds (VOCs) in indoor environments have typical features of multiple components, high concentration, and long duration. The development of gas sensors with high sensitivity to multiple VOCs is of great significance to protect human health. Herein, we proposed a sensitive ZnO/WO3 composite chemi-resistive sensor facilely fabricated via a sacrificial template approach. Based on the transferable properties of self-assembled monolayer colloidal crystal (MCC) templates, two-dimensional honeycomb-like ordered porous ZnO/WO3 sensing matrixes were constructed in situ on commercial ceramic tube substrates with curved and rough surfaces. The nanocomposite thin films are about 250 nm in thickness with large-scale structural consistency and integrity, which facilitates characteristic responses with highly sensitivity and reliability. Furthermore, the nanocomposite sensor shows simultaneous responses to multiple VOCs that commonly exist in daily life with an obvious suppression sensing for traditional flammable gases. Particularly, a detection limit of 0.1 ppm with a second-level response/recovery time can be achieved, which is beneficial for real-time air quality assessments. We proposed a heterojunction-induced sensing enhancement mechanism for the ZnO/WO3 nanocomposite film in which the formation of abundant heterojunctions between ZnO and WO3 NPs significantly increases the thickness of the electron depletion layer in the bulk film and improves the formation of active oxygen species on the surface, which is conducive to enhanced responses for reducing VOC gases. This work not only provides a simple approach for the fabrication of high-performance gas sensors but also opens an achievable avenue for air quality assessment based on VOC concentration detection.

show abstract

“…Additionally, VOCs contain a variety of cancerogenic substances, such as benzene, toluene, ethylbenzene, xylene (BTEX), and aldehydes [ 4 , 5 , 6 ], leading to a series of negative impacts on human health. VOCs generally include C2–C12 nonmethane hydrocarbons, oxygenated volatile organic compounds (OVOCs), halohydrocarbons and other organic matter [ 7 , 8 ]. They are mainly generated by natural and anthropogenic sources, such as the combustion of fuels and wood and from industrial emissions [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Study on the Fingerprint and Atmospheric Activity of Volatile Organic Compounds from Typical Industrial Emissions

Chen

Cai

et al. 2023

IJERPH

View full text Add to dashboard Cite

China is prone to severe surface ozone pollution in summer, so it is very important to understand the source of volatile organic compounds (VOCs) to control ozone formation. In this work, the emission characteristics of 91 VOC components from the plastic products industry, packaging and printing industries, printing ink industry, furniture manufacturing and vehicle manufacturing industries were studied. The results show that there are significant differences between these sources, and for the plastic products industry, alkanes (48%) are the most abundant VOCs. The main emission species in the packaging and printing industry are OVOCs (36%) and alkanes (34%). The proportion of OVOCs in the printing ink (73%) and furniture manufacturing industries (49%) is dominated by VOC emissions; aromatic hydrocarbons (33%), alkanes (33%), and OVOCs (17%) are the main emission species in the vehicle manufacturing industry. At the same time, the ozone generation potential (OFP) and secondary organic aerosol formation potential (SOA) of anthropogenic VOC emissions were evaluated, and the top 10 contributors to OFP and SOA were identified. Toluene, o-xylene, and m-xylene had a significant tendency to form OFP or SOA. Then, a health risk assessment of VOC components was carried out. These data can supplement the existing VOC emission characteristics of anthropogenic emissions, thus enriching the research progress of VOC emission sources.

show abstract

A newly integrated dataset of volatile organic compounds (VOCs) source profiles and implications for the future development of VOCs profiles in China

Cited by 90 publications

References 43 publications

Oxygenated volatile organic compounds (VOCs) as significant but varied contributors to VOC emissions from vehicles

Oxygenated volatile organic compounds (VOCs) as significant but varied contributors to VOC emissions from vehicles

Facile Synthesis of ZnO/WO3 Nanocomposite Porous Films for High-Performance Gas Sensing of Multiple VOCs

Study on the Fingerprint and Atmospheric Activity of Volatile Organic Compounds from Typical Industrial Emissions

Contact Info

Product

Resources

About