重量法测定闽粤藏地区的香品燃烧产生颗粒物的粒径分布特征

Gravimetric determination of particle size distribution characteristics of particulate matter produced by incense combustion in Fujian,Guangdong and Tibet

燃烧产生粒径小于10μm的颗粒物对人体健康存在威胁,因此对不同地区香品燃烧产生颗粒物的粒径分布研究具有重要性。通过对滤膜、样品质量和采样时间的优化选择,采用重量法建立了香品燃烧后产生颗粒物9个粒径段的采集方法。方法检出限为0.0276mg/m^(3),测定下限为0.1105mg/m^(3),相对标准偏差在2.46%~12.26%之间。通过对闽粤藏三个地区9种香品燃烧产生的颗粒物分析,结果表明:(1)9种香品燃烧产生的颗粒物粒径分布特征较为一致,均呈单峰分布,主要集中在0.65~1.1μm和0.43~0.65μm的范围内;(2)PM_(1.1)/PM_(2.1)>70%,PM_(2.1)/PM_(10)>90%;(3)PM_(1.1)、PM_(2.1)、PM_(10)的排放因子分别为10.597~29.251mg/g、11.741~39.568mg/g、12.439~43.467mg/g。

It is crucial to research the particle size distribution of particulate matter created by incense after burning in various places since it is dangerous for human health when particulate matter with a particle size of smaller than 10μm is formed by combustion.In order to create the collecting method for nine particle-size segments of particulate matter produced following incense combustion,the gravimetric approach was utilized in this work and the settings for membrane,sample quality,and sampling time were optimized.The limit of detection of this method was 0.0276 mg/m^(3),the lower limit of determination was 0.1105 mg/m^(3),and the relative standard deviation was 2.46%-12.26%.The investigation of particulate matter produced by the combustion of nine different types of incense in the three regions of Fujian,Guangdong,and Tibet revealed that the particle size distribution characteristics of the particles produced by the combustion of the nine incense were relatively consistent,and all of them showed a unimodal distribution,mainly concentrated in the range of 0.65-1.1μm and 0.43-0.65μm.PMi.,accounted for more than 70% in PM_(2.1),PM_(2.1) accounted for more than 90% in PM_(10).The emission factors of PM_(1.1),PM_(2.1),and PM_(10) were 10.597-29.251 mg/g,11.741-39.568 mg/g and 12.439-43.467 mg/g.