Chemical Bonding and Structural Information of Black CarbonReference Materials and Individual Carbonaceous AtmosphericAerosols

Journal Article · Wed Apr 25 00:00:00 EDT 2007 · Journal of Aerosol Science

DOI:https://doi.org/10.1016/j.jaerosci.2007.03.009· OSTI ID:925587

Hopkins, Rebecca J; Tivanski, Alexei V; Marten, Bryan D; Gilles, Mary K

The carbon-to-oxygen ratios and graphitic nature of a rangeof black carbon standard reference materials (BC SRMs), high molecularmass humic-like substances (HULIS) and atmospheric particles are examinedusing scanning transmission X-ray microscopy (STXM) coupled with nearedge X-ray absorption fine structure (NEXAFS) spectroscopy. UsingSTXM/NEXAFS, individual particles with diameter>100 nm are studied,thus the diversity of atmospheric particles collected during a variety offield missions is assessed. Applying a semi-quantitative peak fittingmethod to the NEXAFS spectra enables a comparison of BC SRMs and HULIS toparticles originating from anthropogenic combustion and biomass burns,thus allowing determination of the suitability of these materials forrepresenting atmospheric particles. Anthropogenic combustion and biomassburn particles can be distinguished from one another using both chemicalbonding and structural ordering information. While anthropogeniccombustion particles are characterized by a high proportion ofaromatic-C, the presence of benzoquinone and are highly structurallyordered, biomass burn particles exhibit lower structural ordering, asmaller proportion of aromatic-C and contain a much higher proportion ofoxygenated functional groups.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Director. Office of Science. Biological andEnvironmental Research
• DOE Contract Number: DE-AC02-05CH11231
• OSTI ID: 925587
• Report Number(s): LBNL-62087; JALSB7; R&D Project: 405502; BnR: KP1205030; TRN: US200810%%46
• Journal Information: Journal of Aerosol Science, Vol. 38, Issue 6; Related Information: Journal Publication Date: 06/2007; ISSN 0021-8502
• Country of Publication: United States
• Language: English

Related Subjects

54
37
ABSORPTION
AEROSOLS
BENZOQUINONES
BIOMASS
BONDING
CALIBRATION STANDARDS
CARBON
COMBUSTION
FINE STRUCTURE
FUNCTIONALS
MICROSCOPY
SPECTRA
SPECTROSCOPY
Black Carbon soot