DOI: 10.1007/s10533-014-0033-8
Scopus记录号: 2-s2.0-84917679680
论文题名: Organic matter decomposition: bridging the gap between Rock–Eval pyrolysis and chemical characterization (CPMAS13C NMR)
作者: Albrecht R. ; Sebag D. ; Verrecchia E.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 122, 期: 1 起始页码: 101
结束页码: 111
语种: 英语
英文关键词: 13C Nuclear magnetic resonance spectroscopy
; Compost
; Organic matter
; Rock–Eval pyrolysis
; Soils
Scopus关键词: chemical composition
; decomposition
; nuclear magnetic resonance
; organic matter
; pedogenesis
; pyrolysis
; soil analysis
; soil chemistry
英文摘要: Organic matter (OM) is a key component of soils but information on its chemistry and behavior in soils is still incomplete. Numerous methods are commonly used to characterize and monitor OM dynamics, but only a few include the qualities required to become routine techniques i.e. simple, rapid, accurate and at low cost. Rock–Eval pyrolysis (RE pyrolysis) is a good candidate, as it provides an overview of OM properties by monitoring four components related to the main major classes of organic constituents (from A1 for the labile biological constituents to A4 for the mature refractory fraction). However, a question is still pending: do these four major classes used in the literature reflect a pertinent compositional chemical counterpart?13C Nuclear Magnetic Resonance Spectroscopy in the solid state (13C CPMAS NMR) has been used to answer this question by collecting information on structural and conformational characteristics of OM. Moreover, in order to avoid the blurring effect of pedogenesis on OM dynamics, a “less complex OM” source, i.e. compost samples, has been used. Results showed significant and high determination coefficients between classes, indices (of transformation of plant biopolymers, humification…) from RE pyrolysis, and the main classes of OM characterized by13C NMR, e.g. A1 & A2 with labile/easily degradable components (alkyl C et O-alkyl C), A3 & A4 with humified OM (with aromatic C and phenolic C). The R index (contribution of bio-macromolecules) is correlated with phenolic and aromatic C, whereas the I index (related to immature OM) refers to labile––easily degradable components (alkyl C et O-alkyl C). The results confirm the pertinence of RE pyrolysis to monitor OM dynamics. © 2014, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83564
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Institut des Sciences de la Terre, Université de Lausanne, Géopolis, Lausanne, Switzerland; Laboratory of Ecological Systems (ECOS), School of Architecture, Civil and Environmental Engineering (ENAC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 2, Lausanne, Switzerland; WSL Swiss Federal Institute for Forest, Snow and Landscape Research, Site Lausanne, Station 2, Lausanne, Switzerland; Laboratoire Morphodynamique Continentale et Côtière, Université de Rouen, CNRS, Mont-Saint-Aignan, France; IRD, HydroSciences Montpellier, Université de Ngaoundéré, Yaoundé, Cameroon
Recommended Citation:
Albrecht R.,Sebag D.,Verrecchia E.. Organic matter decomposition: bridging the gap between Rock–Eval pyrolysis and chemical characterization (CPMAS13C NMR)[J]. Biogeochemistry,2015-01-01,122(1)