Levoglucosan and other cellulose markers in pyrolysates of Miocene lignites: geochemical and environmental implications.
Using the pyrolysis-gas chromatography-mass spectrometry and off-line pyrolysis/silylation methods for lignites from three Miocene brown coal basins of Poland resulted in the characterization of many organic compounds, including dominant cellulose degradation products such as levoglucosan, 1,6-anhydro-beta-D-glucofuranose, and 1,4:3,6-dianhydroglucopyranose. Levoglucosan is a general source-specific tracer for wood smoke in the atmosphere and recent sediments. The presence of unusually high levels of this compound in brown coal pyrolysates suggests that a portion of this compound concentration in some airsheds may originate from lignite combustion. On the other hand, nonglucose anhydrosaccharides, in particular, mannosan and galactosan, typical of hemicellulose, are not detected in those lignite pyrolysates investigated. This indicates that mannosan and galactosan are better specific tracers for combustion of contemporary biomass in those regions were the utilization of brown coals containing fossilized cellulose is important.
Fabbri
Daniele
D
Laboratory of Environmental Sciences "R. Sartori", CIRSA, University of Bologna, Via S. Alberto 163, 48100 Ravenna, Italy.
Marynowski
Leszek
L
Fabiańska
Monika J
MJ
Zatoń
Michał
M
Simoneit
Bernd R T
BR
D000393:Air Pollutants / Q000032:analysis; D002482:Cellulose; D003031:Coal; D008401:Gas Chromatography-Mass Spectrometry; D055593:Geological Phenomena; D005844:Geology; D005947:Glucose / Q000031:analogs & derivatives* / Q000032:analysis; D006358:Hot Temperature; D017646:Organosilicon Compounds / Q000737:chemistry; D011044:Poland; D012906:Smoke / Q000032:analysis; D014297:Trimethylsilyl Compounds / Q000737:chemistry; D014934:Wood
D000393:Air Pollutants; D003031:Coal; D017646:Organosilicon Compounds; D012906:Smoke; D014297:Trimethylsilyl Compounds; C014989:1,6-anhydro-beta-glucopyranose; C047270:N,N-bis(trimethylsilyl)-2,2,2-trifluoroacetamide; D002482:Cellulose; C024548:hexamethylsilazane; D005947:Glucose