桂林市细颗粒物部分典型排放源的粒径谱及成分分析

Particle Size Spectra and Chemical Composition Analysis of Some Typical Emission Source from PM2. 5in Guilin

采用在线单颗粒气溶胶质谱技术源解析方法,对桂林市PM2.5典型排放源的粒径和化学成分进行质谱分析,采集燃煤/燃气源、工业工艺源、扬尘源、油烟源4类共计7个典型排放源。结果表明,桂林市4类排放源细颗粒物的粒径分布为0.25~1.25μm,80%以上的细颗粒分布在0.2~1.0μm的小粒径范围,峰值约0.68μm。细颗粒物离子成分含有Na^+、Mg^+、K^+、NH^+4、Fe^+、Pb^+、Cd^+、V^+、Mn^+、Li^+、Al^+、Ca^+、Cu^+、Zn^+、Cr^+、CN^-、PO_3^-、NO_2^-、NO_3^-、Cl^-、SO_4^(2-)、SiO_3^-等成分,桂林市细颗粒物为元素碳、有机碳元素碳、有机碳、富锰颗粒、富铁颗粒、富钾颗粒、矿物质、左旋葡聚糖以及其他金属等9类。

PM2.5of four categories were collected from seven typical emission sources in Guilin, such as coalfired/gas source, industrial process source, dust source, and soot source. The particle size and chemical composition of PM2.5 were analyzed using source apportionment of online singleparticle aerosol mass spectrometry. The results showed that the particle size distribution of PM2.5of four category emission sources was between 0.25 μm and 1.25 μm, and more than 80% of PM2.5distributed in the range of 0.2 ~ 1.0 μm, which peaks at about 0.68 μm. Ionic components of PM2.5 contained Na＋、Mg＋、K＋、NH＋4、Fe＋、Pb＋、Cd＋、V＋、Mn＋、Li＋、Al＋、Ca＋、Cu＋、Zn＋、Cr＋、CN-、PO-4、NO-2、NO-3、Cl-、SO2-4、SiO-3, etc. PM2.5 in Guilin included nine classes, such as elemental carbon, organic carbon elemental carbon, organic carbon, manganeserich particles, ironrich particles, potassiumrich particles, minerals, Lglucan and other metals.