Levoglucosan and Other Cellulose Markers in Pyrolysates of Miocene Lignites: Geochemical and Environmental Implications

详细信息    查看全文

• 作者：Daniele Fabbri ; Leszek Marynowski ; Monika J. Fabiań ; ska ; Michał ; Zatoń ; Bernd R.T. Simoneit
• 刊名：Environmental Science & Technology
• 出版年：2008
• 出版时间：April 15, 2008
• 年：2008
• 卷：42
• 期：8
• 页码：2957 - 2963
• 全文大小：585K
• 年卷期：v.42,no.8(April 15, 2008)
• ISSN：1520-5851

文摘

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-β-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.