Chemistry and Physics Faculty Articles
Title
Online Single Particle Analysis of Chemical Composition and Mixing State of Crop Straw Burning Particles: From Laboratory Study to Field Measurement
Document Type
Article
Publication Date
4-2016
Publication Title
Frontiers of Environmental Science & Engineering
Keywords
Crop straw burning particles, Mixing state, Aging process, ATOFMS, Ion markers
ISSN
2095-221X
Volume
10
Issue/No.
2
First Page
244
Last Page
252
Abstract
Fresh straw burning (SB) particles were generated in the laboratory by the combustion of rice straw and corn straw. The chemical composition and mixing state of the fresh SB particles were investigated by an Aerosol Time-of-Flight Mass Spectrometer (ATOFMS). Based on the mass spectral patterns, the SB particles were clustered into four major types: Salt, Organic Carbon (OC), Elemental Carbon (EC), and internally mixed particles of EC and OC (EC-OC). In addition, particles containing ash, polycyclic aromatic hydrocarbons, heavy metals or nicotine were also observed. Physical and chemical changes of the SB particles immediately after the emission were analyzed with highly time-resolved data. During the aging processes, the average particle size increased steadily. Freshly emitted organic compounds were gradually oxidized to more oxygenated compounds in the OC-containing particles. Meanwhile, an important displacement reaction (2KCl + SO42− → K2SO4 + 2Cl−) was observed. The marker ions for SB particles were optimized and applied to identify the SB particles in the ambient atmosphere. The fluctuation of the number fraction of ambient SB particles sorted by ATOFMS agrees well with that of water soluble K+ measured by an online ion chromatography, demonstrating that the optimized marker ions could be good tracers for SB particles in field measurements.
Additional Comments
© Higher Education Press and Springer-Verlag Berlin Heidelberg 2015
NSUWorks Citation
Huo, J., Lu, X., Wang, X., Chen, H., Ye, X., Gao, S., Gross, D. S., Chen, J., & Yang, X. (2016). Online Single Particle Analysis of Chemical Composition and Mixing State of Crop Straw Burning Particles: From Laboratory Study to Field Measurement. Frontiers of Environmental Science & Engineering, 10, (2), 244 - 252. https://doi.org/10.1007/s11783-015-0768-z. Retrieved from https://nsuworks.nova.edu/cnso_chemphys_facarticles/57
DOI
10.1007/s11783-015-0768-z
Comments
Supplementary material is available for this article at 10.1007/s11783-015-0768-z and is accessible for authorized users.