| 2018~2022年空气质量持续改善期间秦皇岛市PM2.5和O3污染演变 |
| 摘要点击 583 全文点击 84 投稿时间：2024-02-28 修订日期：2024-05-25 |
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| 中文关键词 复合污染 PM2.5 O3 气象要素 化学组分 |
| 英文关键词 compound pollution PM2.5 O3 meteorological elements chemical components |
| 作者 | 单位 | E-mail | | 史沥介 | 河北工程大学地球科学与工程学院, 邯郸 056038 | sljxx0921@163.com | | 索娜 | 河北省秦皇岛市环境应急与重污染天气预警中心, 秦皇岛 066001 | | | 马博健 | 河北先进环保产业创新中心有限公司, 石家庄 050026 | | | 唐婷 | 河北省秦皇岛市环境应急与重污染天气预警中心, 秦皇岛 066001 | | | 王硕 | 河北工程大学地球科学与工程学院, 邯郸 056038 | | | 马心怡 | 河北工程大学地球科学与工程学院, 邯郸 056038 | | | 纪晓腾 | 河北工程大学地球科学与工程学院, 邯郸 056038 | | | 田宇婷 | 河北工程大学地球科学与工程学院, 邯郸 056038 | | | 朱浩 | 河北工程大学地球科学与工程学院, 邯郸 056038 | | | 牛红亚 | 河北工程大学地球科学与工程学院, 邯郸 056038
河北省资源勘测研究重点实验室, 邯郸 056038 | niuhongya@hebeu.edu.cn |
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| 中文摘要 |
| 为了解秦皇岛市PM2.5和O3复合污染特征,基于2018~2022年秦皇岛市环境空气污染物质量浓度数据、气象数据以及PM2.5化学组分数据进行分析.结果表明,2018~2022年PM2.5年平均值、季节平均值、污染天数以及最大日平均值整体呈下降趋势,年际和春秋季平均值分别下降24.32%、31.65%和21.05%.在PM2.5污染天中,PM2.5质量浓度平均值下降10.39%.根据气象要素分析,春秋季和各污染时段中,主导风向为偏西风,其中在PO复合污染时段中,高质量浓度污染物风向以西南风为主,各时段风速基本低于2 m·s-1. PM2.5中度污染时段温度与春秋季温度平均值接近,PO3和PO4时段温度高于秋季平均值,低于O时段.春秋季水溶性离子中,春季WSIIs质量浓度下降34.99%,秋季2019~2022年WSIIs质量浓度相近.碳组分中,秋季OC质量浓度相近,EC和春季OC、EC质量浓度分别下降41.11%、28.18%和40.29%.各污染时段水溶性离子中SNA质量浓度在WSIIs中占比达到90%以上,春秋季PO时段SNA质量浓度均高于O时段.在相同的污染类型中,Cl-质量浓度表现为春季高于秋季.碳组分中,PM2.5中度污染时段（P3和P4）的OC质量浓度最高,春秋季PO时段SOC质量浓度均高于P和O时段.OC/EC和EC/TC值显示,P和PO时段碳组分主要来自于化石燃料燃烧,O时段主要来自于生物质燃烧和化石燃料燃烧. |
| 英文摘要 |
| In order to understand the characteristics of PM2.5 and O3 composite pollution in the Qinhuangdao City, analyses were conducted based on ambient air pollutant concentration, meteorological, and PM2.5 chemical component data in the Qinhuangdao City from 2018 to 2022. The results revealed that the annual mean, seasonal mean, number of polluted days, and maximum daily mean of PM2.5 showed an overall decreasing trend from 2018 to 2022. The annual and spring-autumn averages fell by 24.32%, 31.65%, and 21.05%, respectively. The average PM2.5 mass concentration decreased by 10.39% on PM2.5-polluted days. According to the meteorological elements, the prevailing wind direction was westerly in spring and autumn and during all pollution periods. During the PO composite pollution period, the wind direction of the high concentration pollutants was dominated by the southwest wind, and the wind speed was generally less than 2 m·s-1 during each period. Temperatures at the time of moderate PM2.5 pollution were close to the mean spring and autumn temperatures, and temperatures at PO3 and PO4 were higher than the autumn mean and lower than those at the time of O. Among the water-soluble ions in spring and autumn, the mass concentration of WSIIs decreased by 34.99% during spring, and the mass concentration of WSIIs was similar during autumn from 2019 to 2022. Among the carbon fractions, OC mass concentrations were similar during autumn, while EC, spring OC and EC mass concentrations decreased by 41.11%, 28.18%, and 40.29%, respectively. SNA mass concentrations in water-soluble ions accounted for more than 90% of WSIIs in all pollution periods, and SNA mass concentrations were higher in PO than in O during spring and autumn. For the same types of pollution, Cl- mass concentrations were higher during spring than during autumn. Among the carbon fractions, OC mass concentrations were highest during the periods of moderate PM2.5 pollution （P3 and P4）, and SOC mass concentrations were higher during PO than during the P and O periods during spring and autumn. The values of OC/EC and EC/TC showed that the carbon component was mainly obtained from fossil fuel combustion in the P and PO periods and from biomass combustion and fossil fuel combustion in the O period. |
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