Details

Autor(en) / Beteiligte

• Qu, Fangqi
• Huang, Yuanjie
• Shen, Yemin
• Zhong, Genqiang
• Xu, Yan
• Jin, Lingling
• Qian, Hongtao
• Xiong, Chun
• Zhang, Fei
• Shen, Jiasi
• Xu, Bingye
• Tian, Xudong
• Xu, Zhengning
• Wang, Zhibin

Titel

Enhanced VOC emission with increased temperature contributes to the shift of O3-precursors relationship and optimal control strategy

Ist Teil von

• Journal of environmental sciences (China), 2025-04, Vol.150, p.218-229

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2025

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Assessing the impact of anthropogenic volatile organic compounds (VOCs) on ozone (O3) formation is vital for the management of emission reduction and pollution control. Continuous measurement of O3 and the major precursors was conducted in a typical light industrial city in the YRD region from 1 May to 25 July in 2021. Alkanes were the most abundant VOC group, contributing to 55.0% of TVOCs concentration (56.43 ± 21.10 ppb). OVOCs, aromatics, halides, alkenes, and alkynes contributed 18.7%, 9.6%, 9.3%, 5.2% and 1.9%, respectively. The observational site shifted from a typical VOC control regime to a mixed regime from May to July, which can be explained by the significant increase of ROx production, resulting in the transition of environment from NOx saturation to radical saturation with respect to O3 production. The optimal O3 control strategy should be dynamically changed depending on the transition of control regime. Under NOx saturation condition, minimizing the proportion of NOx in reduction could lead to better achievement of O3 alleviation. Under mixed control regime, the cut percentage gets the top priority for the effectiveness of O3 control. Five VOCs sources were identified: temperature dependent source (28.1%), vehicular exhausts (19.9%), petrochemical industries (7.2%), solvent & gasoline usage (32.3%) and manufacturing industries (12.6%). The increase of temperature and radiation would enhance the evaporation related VOC emissions, resulting in the increase of VOC concentration and the change of ROx circulation. Our results highlight determination of the optimal control strategies for O3 pollution in a typical YRD industrial city.