[Characteristics of Ozone Photochemical Reaction and Emission Reduction Strategies in Summer and Autumn in Shangqiu].

Q2 Environmental Science
Xiao-Mei Jiang, Lei-Tao Sun, Ling-Ling Wang, Sheng-Xian Hou, Li-Ya Fan, Dai-Qi Ye
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引用次数: 0

Abstract

Recently, ozone (O3) pollution in Shangqiu has become increasingly prominent, especially in summer and autumn, crucially affecting the local environmental air quality. Based on the monitoring data of O3 pollution days from the Environmental Monitoring Station in June and September 2022 (representing summer and autumn) in Shangqiu, an observation-based model (OBM) was used to study the causes and photochemical reaction characteristics of O3 pollution in the city and precursor emission reduction strategies were studied. The observation results indicated that during summer in Shangqiu, the ρ(O3) and O3 daily maximum 8 h moving concentrations [ρ(MDA8-O3)] were 149.7 μg·m-3 and 195.4 μg·m-3, whereas in autumn, ρ(O3) and ρ(MDA8-O3) were 119.8 μg·m-3 and 173.9 μg·m-3, respectively; the O3 concentration in summer was significantly higher than that in autumn. Ozone sensitivity research showed that the generation of O3 in summer and autumn in Shangqiu was controlled by volatile organic compounds (VOCs). Among them, oxygen-containing volatile organic compounds (OVOCs), aromatic hydrocarbons, and alkenes contributed the most to the ozone generation potential (OFP) and ·OH reactivity (L·OH), and the control must have been strengthened. The OBM simulation results indicated that the maximum O3 generation rates in summer and autumn were 23.0×10-9 h-1 and 13.6×10-9 h-1, with maximum net generation rates of 17.4×10-9 h-1 and 10.4×10-9 h-1 and the maximum and maximum net generation rates of O3 in summer were 1.68 times higher than those in autumn, indicating that the photochemical reactions in summer were significantly stronger than those in autumn. Compared with that in summer, the generation of O3 in autumn was greatly influenced by regional inputs from other regions or cities, with a maximum input of 14.2×10-9 h-1. The prevention and control of O3 pollution in the summer and autumn seasons in Shangqiu should mainly focus on controlling VOCs. The reduction ratio of VOCs/nitrogen oxides (NOx) in autumn should be greater than that in summer and the reduction ratios of 3∶1 in summer and 4∶1 in autumn could be adopted for control.

[商丘夏秋季臭氧光化学反应特征及减排策略]。
近来,商丘市臭氧(O3)污染问题日益突出,尤其是夏秋季节,严重影响了当地的环境空气质量。根据商丘市环境监测站 2022 年 6 月和 9 月(夏秋两季)的臭氧污染天数监测数据,基于模型(OBM)对商丘市臭氧污染进行了观测。基于观测的模型(OBM)研究了商丘市 O3 污染的成因和光化学反应特征,并研究了前体物质减排策略。观测结果表明,商丘夏季ρ(O3)和 O3 日最大 8 小时移动浓度[ρ(MDA8-O3)]分别为 149.7 μg-m-3 和 195.4 μg-m-3,而在秋季,ρ(O3)和 ρ(MDA8-O3)分别为 119.8 μg-m-3 和 173.9 μg-m-3;夏季的臭氧浓度明显高于秋季。臭氧敏感性研究表明,商丘夏秋季 O3 的生成主要受挥发性有机物(VOCs)的控制。其中,含氧挥发性有机化合物(OVOCs)、芳香烃和烯烃对臭氧生成潜势(OFP)和-OH反应性(L-OH)的贡献最大。和 -OH 反应性(L-OH),因此必须加强控制。OBM 模拟结果表明,夏季和秋季的 O3 最大生成率分别为 23.0×10-9 h-1 和 13.6×10-9 h-1,最大净生成率分别为 17.4×10-9 h-1 和 10.4×10-9 h-1,夏季的 O3 最大生成率和最大净生成率是秋季的 1.68 倍,表明夏季的光化学反应明显强于秋季。与夏季相比,秋季的 O3 生成量受其他地区或城市的区域输入影响较大,最大输入量为 14.2×10-9 h-1。商丘市夏秋季节的 O3 污染防治应以控制 VOCs 为主。秋季 VOCs/氮氧化物(NOx)的削减比例应大于夏季。秋季的 VOCs/氮氧化物(NOx)削减比应大于夏季,可采用夏季 3∶1、秋季 4∶1 的削减比进行控制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Huanjing Kexue/Environmental Science
Huanjing Kexue/Environmental Science Environmental Science-Environmental Science (all)
CiteScore
4.40
自引率
0.00%
发文量
15329
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