气候变化领域集成服务门户(CCPortal): Laboratory studies of fresh and aged biomass burning aerosol emitted from east African biomass fuels-Part 2: Chemical properties and characterization

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DOI	10.5194/acp-20-10169-2020
	Laboratory studies of fresh and aged biomass burning aerosol emitted from east African biomass fuels-Part 2: Chemical properties and characterization
	Smith D.M.; Cui T.; Fiddler M.N.; Pokhrel R.P.; Surratt J.D.; Bililign S.
发表日期	2020
ISSN	1680-7316
起始页码	10169
结束页码	10191
卷号	20 期号:17
英文摘要	There are many fuels used for domestic purposes in east Africa, producing a significant atmospheric burden of the resulting aerosols, which includes biomass burning particles. However, the aerosol physicochemical properties are poorly understood. Here, the combustion of eucalyptus, acacia, and olive fuels was performed at 500 and 800 °C in a tube furnace, followed by immediate filter collection for fresh samples or introduction into a photochemical chamber to simulate atmospheric photochemical aging under the influence of anthropogenic emissions. The aerosol generated in the latter experiment was collected onto filters after 12 h of photochemical aging. 500 and 800 °C were selected to simulate smoldering and flaming combustion, respectively, and to cover a range of combustion conditions. Methanol extracts from Teflon filters were analyzed by ultra-performance liquid chromatography interfaced to both a diode array detector and an electrospray ionization high-resolution quadrupole time-of-flight mass spectrometer (UPLC/DAD-ESI-HR-QTOFMS) to determine the light absorption properties of biomass burning organic aerosol constituents chemically characterized at the molecular level. Few chemical or UV-visible (UV: ultraviolet) differences were apparent between samples for the fuels when combusted at 800 °C. Differences in single-scattering albedo (SSA) between fresh samples at this temperature were attributed to compounds not captured in this analysis, with eucalyptol being one suspected missing component. For fresh combustion at 500 °C, many species were present; lignin pyrolysis and distillation products are more prevalent in eucalyptus, while pyrolysis products of cellulose and at least one nitro-aromatic species were more prevalent in acacia. SSA trends are consistent with this, particularly if the absorption of those chromophores extends to the 500-570 nm region. Upon aging, both show that resorcinol or catechol was removed to the highest degree, and both aerosol types were dominated by loss of pyrolysis and distillation products, though they differed in the specific compounds being consumed by the photochemical aging process. © 2020 Author(s).
语种	英语
scopus关键词	aerosol; biomass burning; combustion; distillation; laboratory method; liquid chromatography; methanol; physicochemical property; pyrolysis; East Africa; Acacia; Eucalyptus
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141127
作者单位	Department of Physics, North Carolina Agricultural and Technical State University, Greensboro, NC 27411, United States; Applied Sciences and Technology Program, North Carolina A and T State University, Greensboro, NC 27411, United States; Department of Chemistry, North Carolina Agricultural and Technical State University, Greensboro, NC 27411, United States; Department of Environmental Science and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599, United States; Department of Chemistry and Physics, Western Carolina University, Cullowhee, NC 28723, United States; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen, 5232, Switzerland
推荐引用方式 GB/T 7714	Smith D.M.,Cui T.,Fiddler M.N.,et al. Laboratory studies of fresh and aged biomass burning aerosol emitted from east African biomass fuels-Part 2: Chemical properties and characterization[J],2020,20(17).
APA	Smith D.M.,Cui T.,Fiddler M.N.,Pokhrel R.P.,Surratt J.D.,&Bililign S..(2020).Laboratory studies of fresh and aged biomass burning aerosol emitted from east African biomass fuels-Part 2: Chemical properties and characterization.Atmospheric Chemistry and Physics,20(17).
MLA	Smith D.M.,et al."Laboratory studies of fresh and aged biomass burning aerosol emitted from east African biomass fuels-Part 2: Chemical properties and characterization".Atmospheric Chemistry and Physics 20.17(2020).