2023年春节期间宿迁市PM2.5化学组分特征与来源解析
PM2.5 Chemical Characteristics and Sources Apportionment of in Suqian City During Spring Festival of 2023
周子尧 1刘昌威 2王亮 3田军3
作者信息
- 1. 南大环境规划研究院(江苏)有限公司,南京 211500
- 2. 江苏省宿迁环境监测中心,江苏宿迁 223800
- 3. 南京大学,环境规划设计研究院集团股份公司,南京 210093
- 折叠
摘要
2023年春节期间(1月18日—25日),宿迁市发生了一次短时PM2.5重度污染,利用宿迁市环境空气国控监测站、大气超级站、在线单颗粒气溶胶质谱仪等对PM2.5化学组分进行分析,对颗粒物的主要组分进行来源解析,探讨燃放烟花爆竹对空气质量的影响.结果表明,春节期间整体空气质量良好,峰值出现在21日22时-22日0时(除夕夜),PM2.5浓度范围为165～206 µg/m3,达到重度污染水平,各项化学组分抬升明显,二次有机物占比明显抬升.烟花爆竹燃放指征重金属元素在除夕夜前后变化幅度较大,PM2.5小时均值同步上升3.0倍,K+和Cl-浓度多次出现同时突升,重金属元素和离子元素双重佐证了烟花爆竹燃放助推了颗粒物浓度高值.由于烟花燃放特征离子与本地扬尘源特征离子存在共性(Al+、Ba+、Mg+等矿物质成分),在不利气象条件下主要表现为扬尘源对大气颗粒物贡献率的增加.
Abstract
During Spring Festival of 2023(January 18th to January 25th),a short-term severe PM2.5pollution process occurred in Suqian City.The chemical components of PM2.5 were analyzed with the Suqian Environmental Air National Control Monitoring Station,Atmospheric Super Station,and online single particle aerosol mass spectrometer.The main components of particulate matter were analyzed for their sources,with the aim of exploring the impact of setting off fireworks and firecrackers on air quality.The results show that during Spring Festival,the overall air quality is good,with a peak occurring from 22:00 on the 21st to 0:00 on the 22nd(New Year's Eve)and a PM2.5 concentration range of 165～206 µg/m3,reaching a severe pollution level,with a significant increase in various chemical components and a significant increase in the proportion of secondary organic matter.The setting off of fireworks and firecrackers indicates a significant change in heavy metal elements before and after New Year's Eve,with a synchronous increase of 3.0 times in the hourly mean PM2.5.The concentrations of K+and Cl-have repeatedly appeared and suddenly increased,as evidenced by the dual effects of heavy metal and ion elements.The setting off of fireworks and firecrackers has contributed to the high concentration of particulate matter this time.Due to the commonality between the characteristic ions of fireworks discharge and the local dust source characteristic ions(such as mineral components such as Al+,Ba+and Mg+),under adverse meteorological conditions,the main manifestation is the increase in the contribution rate of dust sources to atmospheric particulate matter.
关键词
细颗粒物(PM2.5)/烟花燃放/春节/化学组分/来源解析Key words
Fine particulate matter(PM2.5)/Fireworks burning/Spring Festival/Chemical species/Source apportionment引用本文复制引用
出版年
2024
NETL
NSTL
万方数据