State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
Atmospheric Environment Institute of Safety and Pollution Control, Jinan University, Guangzhou 510632, China.
Sci Total Environ. 2017 Nov 15;598:341-352. doi: 10.1016/j.scitotenv.2017.04.132. Epub 2017 Apr 24.
In this study, single particle mass spectra signatures of both coal burning boiler and biomass burning boiler emitted particles were studied. Particle samples were suspended in clean Resuspension Chamber, and analyzed by ELPI and SPAMS simultaneously. The size distribution of BBB (biomass burning boiler sample) and CBB (coal burning boiler sample) are different, as BBB peaks at smaller size, and CBB peaks at larger size. Mass spectra signatures of two samples were studied by analyzing the average mass spectrum of each particle cluster extracted by ART-2a in different size ranges. In conclusion, BBB sample mostly consists of OC and EC containing particles, and a small fraction of K-rich particles in the size range of 0.2-0.5μm. In 0.5-1.0μm, BBB sample consists of EC, OC, K-rich and Al_Silicate containing particles; CBB sample consists of EC, ECOC containing particles, while Al_Silicate (including Al_Ca_Ti_Silicate, Al_Ti_Silicate, Al_Silicate) containing particles got higher fractions as size increase. The similarity of single particle mass spectrum signatures between two samples were studied by analyzing the dot product, results indicated that part of the single particle mass spectra of two samples in the same size range are similar, which bring challenge to the future source apportionment activity by using single particle aerosol mass spectrometer. Results of this study will provide physicochemical information of important sources which contribute to particle pollution, and will support source apportionment activities.
在这项研究中，研究了燃煤锅炉和生物质燃烧锅炉排放颗粒的单颗粒质谱特征。将颗粒样品悬浮在清洁的再悬浮室中，同时通过 ELPI 和 SPAMS 进行分析。BBB（生物质燃烧锅炉样品）和 CBB（燃煤锅炉样品）的粒径分布不同，因为 BBB 在较小的粒径处出现峰值，而 CBB 在较大的粒径处出现峰值。通过分析 ART-2a 在不同粒径范围内提取的每个颗粒簇的平均质谱，研究了两个样品的质谱特征。总之，BBB 样品主要由 OC 和 EC 含量较高的颗粒以及少量富 K 颗粒组成，粒径范围为 0.2-0.5μm。在 0.5-1.0μm 范围内，BBB 样品由 EC、OC、富 K 和含 Al_Silicate 的颗粒组成；CBB 样品由 EC、ECOC 含量较高的颗粒组成，而 Al_Silicate（包括 Al_Ca_Ti_Silicate、Al_Ti_Silicate、Al_Silicate）含量较高的颗粒随着粒径的增加而获得更高的分数。通过分析点积研究了两个样品的单颗粒质谱特征的相似性，结果表明，两个样品在相同粒径范围内的部分单颗粒质谱相似，这给未来利用单颗粒气溶胶质谱仪进行源解析活动带来了挑战。本研究的结果将提供对颗粒污染有贡献的重要源的物理化学信息，并将支持源解析活动。
