摘要
文章针对兰州市2021年疫情管控期间(10月26日-11月14日)和疫情管控后(11月15-20日)大气污染状况进行对比,探究了2个时间段气象条件影响以及大气污染特征和来源的差异。疫情期间颗粒物浓度明显低于疫情后,表明疫情管控措施对大气颗粒物浓度的降低有一定成效。PM_(2.5)颗粒主要组分中,混合碳(ECOC)、富钾(K)、富钠(Na)组分占比在疫情后上升,而有机碳(OC)和元素碳(EC)占比减少;燃煤和生物质燃烧源贡献在疫情后显著增加,并呈现夜间升高的日变化趋势;疫情管控期间及疫情后,兰州市大气污染来源均以本地生成和省内传输为主。
Based on the comparison of air pollution during the epidemic control period(October 26 to November 14) and after the epidemic control(November 15 to November 20) in Lanzhou in 2021, the influence of meteorological conditions and the differences of air pollution characteristics and sources in the two time periods were explored. The concentration of particulate matter during the epidemic was significantly lower than that after the epidemic, indicating that the epidemic control measures had a certain effect on the reduction of atmospheric particulate matter concentration. Among the major components of PM_(2.5)particles, the proportions of ECOC, K and Na increased after the epidemic, while the proportions of OC and EC decreased. The contribution of coal and biomass combustion sources increased significantly after the epidemic, and showed a diurnal trend of increasing at night. During and after the epidemic control, the sources of air pollution in Lanzhou are mainly generated locally and transmitted within the province.
作者
陶会杰
宋伟宏
王莉娜
杨燕萍
杨丽丽
TAO Huijie;SONG Weihong;WANG Lina;YANG Yanping;YANG Lili(Gansu Province Environmental Monitoring Center,Lanzhou 730020,China;Gansu Nuclear and Radiation Safety Center,Lanzhou 730020,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2022年第11期55-61,共7页
Environmental Science & Technology
基金
甘肃省青年科技基金计划项目(21JR7RA691)。
关键词
颗粒物组分
大气扩散条件
来源解析
污染传输
particulate matter composition
atmospheric diffusion conditions
source analysis
pollution transmission
