2018元宵节前后烟花爆竹对南昌市PM_(2.5)的影响
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摘要
为研究烟花爆竹燃放对南昌市PM_(2.5)的影响,2018年3月2—5日针对南昌市PM_(2.5)质量浓度的变化趋势进行分析,同时结合单颗粒气溶胶飞行时间质谱仪对烟花爆竹燃放释放的颗粒物的质谱特征,对元宵节前后烟花爆竹源在PM_(2.5)中的占比进行了评估。结果表明,3月2日夜间至3月3日凌晨时段的PM_(2.5)质量浓度升高与烟花爆竹燃放有关;烟花爆竹源颗粒物占所有颗粒数的11.5%,3月3日日均占比最高为13.7%;烟花特征离子中,Al~+数浓度上升了约4.4倍,Ba~+数浓度上升了约16.9倍,Mg~+数浓度上升了约3.9倍;此外K_2Cl~+数浓度上升了约24.4倍。
In order to study the impact of fireworks and firecrackers on PM_(2.5) in Nanchang city, the trend of PM_(2.5) mass concentration in Nanchang city was analyzed from March 2nd to 5th, 2018, and the mass spectrometric characteristics of fireworks and firecrackers by using single particle aerosol time-of-flight mass spectrometer was used to were evaluate the proportion of fireworks and firecrackers in PM_(2.5) before and after the Lantern Festival. The results showed that the increase of PM_(2.5) mass concentration from the night of March 2nd to the early morning of March 3rd may be related to the fireworks and firecrackers; the fireworks and firecracker source particles account for 11.5% of all the particles, and the daily average was 13.7% on March 3 which was the highest; in the characteristic ions of fireworks, the concentration of Al+increased by about 4.4 times, the concentration of Ba+increased by about 16.9 times, the concentration of Mg+ increased by about 3.9 times, and the concentration of K_2Cl~+ increased by about 24.4 times.
In order to study the impact of fireworks and firecrackers on PM_(2.5) in Nanchang city, the trend of PM_(2.5) mass concentration in Nanchang city was analyzed from March 2nd to 5th, 2018, and the mass spectrometric characteristics of fireworks and firecrackers by using single particle aerosol time-of-flight mass spectrometer was used to were evaluate the proportion of fireworks and firecrackers in PM_(2.5) before and after the Lantern Festival. The results showed that the increase of PM_(2.5) mass concentration from the night of March 2nd to the early morning of March 3rd may be related to the fireworks and firecrackers; the fireworks and firecracker source particles account for 11.5% of all the particles, and the daily average was 13.7% on March 3 which was the highest; in the characteristic ions of fireworks, the concentration of Al+increased by about 4.4 times, the concentration of Ba+increased by about 16.9 times, the concentration of Mg+ increased by about 3.9 times, and the concentration of K_2Cl~+ increased by about 24.4 times.
引文
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[10]黎常成.禁止燃放烟花爆竹对城市环境空气质量的影响[J].广东化工,2018,45(14):203-206.
[11]张琴.2017年春节期间燃放烟花爆竹对湖南省城市环境空气质量的影响研究[J].环境科学与管理,2017,42(7):102-106.
[12]王占山,李云婷,孙峰,等.烟花爆竹燃放对北京市空气质量的影响研究[J].中国环境监测,2016,32(4):15-21.
[13]张俊,吉祝美,咸月,等.大气细颗粒物实时在线源解析技术解析盐城市大气细颗粒物来源[J].污染防治技术,2015(2):18-22.
[14]Li Lei,Huang Zhengxu,Dong Junguo,et al.Real time bipolar time-of-flight mass spectrometer for analyzing single aerosol particles[J].International Journal of Mass Spectrometry,2011,303(2):118-124.
[15]李梅,李磊,黄正旭,等.运用单颗粒气溶胶质谱技术初步研究广州大气矿尘污染[J].环境科学研究,2011,24(6):632-636.
[16]Song Xinhua,Hopke P K,Fergenson D P,et al.Classification of single particles analyzed by ATOFMS using an artificial neural network,ART-2a[J].Analytical Chemistry,1999,71:860-865.