| 阳泉市冬季一次典型重污染过程成因分析 |
| Analysis of a Typical Heavy Pollution Process in Yangquan City in Winter |
| 投稿时间：2023-08-21 修订日期：2024-04-22 |
| DOI：10.19316/j.issn.1002-6002.2025.01.10 |
| 中文关键词: 京津冀及周边地区 化学组分 阳泉市 硝酸盐 区域传输 |
| 英文关键词:Beijing-Tianjin-Hebei and surrounding areas chemical composition Yangquan City nitrate regional transportation |
| 基金项目:山西省重点研发计划项目(202202090301023);山西省大气污染防治专项项目(ZWY-GT-2021-006) |
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| 中文摘要: |
| 为进一步探明“ 2+26”城市中的典型山地城市的PM2.5污染成因,基于空气质量监测数据、气象观测数据和PM2.5组分监测数据,针对2021年11月4—7日阳泉市一次典型重污染过程展开研究。结果表明:①在此次污染过程中,阳泉市为山西省的污染高值中心,重度污染持续时长达11 h,PM2.5小时浓度峰值达172 μg/m3;重污染区域主要聚集在河北南部和河南北部。②高湿、静稳和局地辐合等不利气象条件造成了二次无机盐的爆发性增长,叠加偏东方向污染物的传输,加剧了阳泉市重污染的程度。③污染时段二次无机盐中,硝酸盐的增长更为明显,其中硫酸盐和铵盐浓度增加了200%以上,硝酸盐浓度增加了600%以上。④建议阳泉市在不利气象条件下进一步加强对机动车尾气、燃煤和工业锅炉废气的排放管控,减少前期以NO2为主的气态污染物的排放,以减弱PM2.5的二次转化,从源头上控制大气污染。 |
| 英文摘要: |
| To further understand the causes of PM2.5 pollution in the typical mountainous cities of the " 2+ 26" cities in BeijingTianjin-Hebei and its surrounding areas,a study was conducted based on air quality,meteorological data,and PM2.5 component data during the pollution process from November 4th to 7th,2021. The results indicated that:① During this pollution process, Yangquan City was the high pollution center in Shanxi Province,experiencing severe pollution for 11 consecutive hours,with the peak hourly concentration of PM2.5 reaching 172 μg/m3,and regional heavy pollution accumulating in the southern part of Hebei and the northern part of Henan. ② Unfavorable meteorological conditions such as high humidity,stability,and local convergence led to an explosive growth of secondary inorganic salts, combined with pollution transmission from the east, exacerbating the severity of pollution in Yangquan City. ③During the pollution period,the growth of nitrate in secondary inorganic salts was more significant,with sulfate and ammonium salts increasing by over 200%, while nitrate increased by over 600%. ④ It is recommended to strengthen control over vehicle exhaust emissions, coal combustion, and industrial boiler emissions under unfavorable meteorological conditions, in order to reduce the emission of gaseous pollutants characterized by NO2 in the early stages and control the secondary conversion of PM2.5 to mitigate pollution. |
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