δ13C values of pyrolysis products from cellulose and lignin represent the isotope content of their precursors

Steinbeiss, Sibylle; Schmidt, Christian M.; Heide, K.; Gleixner, Gerd

doi:10.1016/j.jaap.2005.03.009

Cited by 44 publications

(37 citation statements)

References 32 publications

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“…After coupling pyrolysis to compound-specific isotope ratio mass spectrometry (GC-IRMS), the isotopic content of individual pyrolysis products were measured (Gleixner and Schmidt 1998;Schulten and Gleixner 1999). Most interestingly, the 13 C isotope ratios of the volatile pyrolysis products mirror the isotopic content of their non-volatile precursors (Steinbeiss et al 2006). In consequence, this technique can be used to determine the turnover and recycling of molecular fragments of soil organic matter using isotopic labeling.…”

Section: Origin and Turnover Of Organic Matter Found In Soilmentioning

confidence: 99%

Soil organic matter dynamics: a biological perspective derived from the use of compound‐specific isotopes studies

Gleixner

2013

Ecological Research

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Section: Origin and Turnover Of Organic Matter Found In Soilmentioning

confidence: 99%

Soil organic matter dynamics: a biological perspective derived from the use of compound‐specific isotopes studies

Gleixner

2013

Ecological Research

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207

147

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“…Pyrolysis was carried out under helium for 9.9 s at 500 • C with a Curie point Pyrolyzer 0316 (Thermo Fisher, USA). Volatile pyrolysis products were separated by gas chromatography (HP 5890, Germany) with a BPX5 capillary column (length, 60 m; inner diameter, 0.32 mm; film thickness, 1 µm; SGE, Germany) and analyzed using an ion trap mass spectrometer (Thermo Fisher, GCQ, USA) (Steinbeiss et al, 2006).…”

Section: Analytical Techniquesmentioning

confidence: 99%

Effect of peat quality on microbial greenhouse gas formation in an acidic fen

2010

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Abstract.Peatlands play an important role in the global carbon cycle and represent both an important stock of soil carbon and a substantial natural source of relevant greenhouse gases like CO 2 and CH 4 . While it is known that the quality of organic matter affects microbial degradation and mineralization processes in peatlands, the manner in which the quality of peat organic matter affects the formation of CO 2 and CH 4 remains unclear. In this study we developed a fast and simple peat quality index in order to estimate its potential greenhouse gas formation by linking the thermo-degradability of peat with potential anaerobic CO 2 and CH 4 formation rates. Peat samples were obtained at several depths (0-40 cm) at four sampling locations from an acidic fen (pH∼4.7). CO 2 and CH 4 formation rates were highly spatially variable and depended on depth, sampling location, and the composition of pyrolysable organic matter. Peat samples active in CO 2 and CH 4 formation had a quality index above 1.35, and the fraction of thermally labile pyrolyzable organic matter (comparable to easily available carbon substrates for microbial activity) obtained by thermogravimetry was above 35%. Curie-point pyrolysis-gas chromatography/mass spectrometry mainly identified carbohydrates and lignin as pyrolysis products in these samples, indicating that undecomposed organic matter was found in this fraction. In contrast, lipids and unspecific pyrolysis products, which indicate recalcitrant and highly decomposed organic matter, correlated significantly with lower CO 2 formation and reduced methanogenesis. Our results suggest that undecomposed organic matter is a prerequisite for CH 4 and CO 2 development in acidic fens. Furthermore, the new peat quality index should aide the estimation of potential greenhouse gas formation resulting from peatland restoration and permafrost thawing and help yield more robust models of trace gas fluxes from peatlands for climate change research.

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“…As the δ 13 C of the respective products following charring of isolated cellulose and lignin (e.g. levoglucosan), is equivalent to that of their precursors (Steinbeiss et al, 2006), the reduction in δ 13 C during production of pine charcoal may result from a greater contribution of isotopically lighter lignin-derived carbon to the developing charcoal structure. The reduction in δ 13 C over 400ºC is unlikely to result from continued -19 -removal of cellulose, as near complete thermal degradation of aliphatic-C has occurred.…”

Section: δ 13 C Variations During Charcoal Formationmentioning

confidence: 99%

Influence of production variables and starting material on charcoal stable isotopic and molecular characteristics

Ascough

Bird

Wormald

et al. 2008

Geochimica et Cosmochimica Acta

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We present a systematic study on the effect of starting species, gas composition, temperature, particle size and duration of heating upon the molecular and stable isotope composition of high density (mangrove) and low density (pine) wood. In both pine and mangrove, charcoal was depleted in δ 13 C relative to the starting wood by up to 1.6‰ and 0.8‰ respectively. This is attributed predominantly to the progressive loss of isotopically heavier polysaccharides, and kinetic effects of aromatization during heating. However, the pattern of δ 13 C change was dependant upon both starting species and atmosphere, with different structural changes associated with charcoal production from each wood type elucidated by Solid State 13 C Nuclear Magnetic Resonance Spectroscopy. These are particularly evident at lower temperatures, where variation in the oxygen content of the production atmosphere results in differences in the thermal degradation of cellulose and lignin. It is concluded that production of charcoal from separate species in identical conditions, or from a single sample exposed to different production variables, can result in significantly different δ 13 C of the resulting material, relative to the initial wood. These results have implications for the use of charcoal isotope composition to infer past environmental change.

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δ13C values of pyrolysis products from cellulose and lignin represent the isotope content of their precursors

Cited by 44 publications

References 32 publications

Soil organic matter dynamics: a biological perspective derived from the use of compound‐specific isotopes studies

Soil organic matter dynamics: a biological perspective derived from the use of compound‐specific isotopes studies

Effect of peat quality on microbial greenhouse gas formation in an acidic fen

Influence of production variables and starting material on charcoal stable isotopic and molecular characteristics

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