| Autor: |
Wu K; College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China.; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China., Wang XZ; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China., Zhang DD; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.; College of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China., Zhu HL; Bozhou Municipal Ecology and Environment Bureau, Bozhou 236000, China., Yan YX; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China., Li FX; College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China., Wu ZH; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China., Zheng ZW; Bozhou Municipal Ecology and Environment Bureau, Bozhou 236000, China., Gao QK; Bozhou Municipal Ecology and Environment Bureau, Bozhou 236000, China. |
| Abstrakt: |
In China, atmospheric pollution exhibits a complex pattern, with simultaneous exceedances of fine particulate matter （PM 2.5 ） and ozone （O 3 ） levels becoming evident. To understand the complex pollution characteristics and evolution patterns of PM 2.5 and O 3 in Bozhou City, various methods such as weather classification, analysis of typical pollution processes, and investigation of precursor sources were employed to explore the pollution and variations of PM 2.5 and O 3 in Bozhou City from 2017 to 2022 and subsequently analyze their causes and precursor sources. The results indicated that： ① PM 2.5 -O 3 complex pollution in Bozhou City mostly occurred under high-pressure weather conditions, with daytime high temperatures and low humidity promoting the formation of O 3 pollution, whereas nighttime high humidity and atmospheric oxidative conditions promoted the generation of secondary components such as nitrates and ammonium salts in PM 2.5 . ② During the pollution process, PM 2.5 in Bozhou City mainly originated from biomass burning, secondary generation, traffic pollution, coal combustion, and dust sources. Volatile organic compounds （VOCs） primarily emerged from plant sources, traffic pollution, oil and gas evaporation, solvent use, fossil fuel combustion, residential emissions, and industrial emissions. Biomass burning and traffic pollution made significant contributions to the pollution process. ③ Analysis of air mass trajectories and regional pollution situations indicated that the overlay of northern and southern air masses, along with local generation, were the main causes of the PM 2.5 -O 3 complex pollution in Bozhou from October 18th to 27th, 2022. |
