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滁州市臭氧污染特征及一次连续臭氧污染过程分析
Analysis of Characteristics of Ozone Pollution and a Continuous Ozone Pollution Process in Chuzhou
投稿时间:2021-07-27  修订日期:2022-05-30
DOI:10.19316/j.issn.1002-6002.2022.05.06
中文关键词:  滁州市|臭氧|污染过程|挥发性有机物|气象要素
英文关键词:Chuzhou City|ozone|pollution process|VOCs|meteorological factor
基金项目:国家重点研发计划项目(2018YFC0213800);安徽省公益性研究联动计划项目(1604f0804003)
作者单位
程龙 安徽省生态环境监测中心, 安徽 合肥 230071 
董昊 安徽省生态环境监测中心, 安徽 合肥 230071 
王含月 安徽省生态环境监测中心, 安徽 合肥 230071 
陈林昌 安徽省滁州生态环境监测中心, 安徽 滁州 239000 
邓学良 安徽省气象科学研究所, 安徽 合肥 230031 
朱余* 安徽省生态环境监测中心, 安徽 合肥 230071 
通讯作者:朱余*  安徽省生态环境监测中心, 安徽 合肥 230071  
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中文摘要:
      利用滁州市环境空气质量监测数据和气象观测数据,分析了滁州市O3污染基本特征,并着重分析了一次连续O3污染过程中气象因素、VOCs以及其他污染物对于O3浓度的影响。结果表明:滁州市环境空气污染类型正由"PM2.5型"向"PM2.5和O3混合型"转变,O3污染程度呈现加重趋势,污染持续时间有所拉长。9月4—9日一次连续O3污染过程中O3呈单峰状;受到光化学生成和区域传输共同影响,峰值时气温大多在30℃以上,相对湿度较小,风速大多处于小风区(WS≤1 m/s),也有部分处于风速较大区域(WS>3 m/s);VOCs/NOx比值法和O3/NOx比值法均反映此次连续O3污染为VOCs控制;体积分数较大的VOCs物种主要为烷烃,其中单个体积分数最大的物种是乙烷;烯烃是对O3生成贡献最大的关键活性组分,对O3生成潜势的贡献为53.5%,控制1-戊烯、反2-戊烯、异戊二烯、间/对二甲苯等物种可以有效控制光化学生成对此次O3污染过程的影响。
英文摘要:
      The basic characteristics of ozone pollution in Chuzhou were analyzed based on the local dataset of ambient air quality monitoring and meteorological parameters.The effects of meteorological parameters,VOCs and other pollutants on the concentration of ozone in a persistent ozone pollution episode in Chuzhou were discussed.The results showed that the air pollution type in Chuzhou were changing from "PM2.5 type" to "PM2.5 and O3 mixed type".The degree of O3 pollution showed an enhanced trend,and the pollution duration had been extended.A persistent ozone episode from 4th to 9th September showed that O3 concentration presented as the singlet trend.Under the influence of photochemical generation and regional transmission,the temperature at the peak was above 30℃,the relative humidity was small,the wind speed was mostly in the area of small wind(WS ≤ 1 m/s),and part of it was in the area of larger wind speed(WS>3 m).Both the ratio of VOCs/NOx and O3/NOx reflected that the pollution episode was VOCs limited.The VOCs species with larger volume fractions were mainly alkanes,and the species with the largest single volume fraction was ethane.Olefins were the key active components that contribute the most to O3 generation,and their contribution to O3 generation potential was 53.5%.This ozone pollution episode could be effectively weakened by controlling of 1-pentene,trans-2-pentene,isoprene,m/p-xylene and other species.
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