English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/56151
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Chemical structure of a soil humic acid as revealed by analytical pyrolisis

AuthorsSáiz-Jiménez, Cesáreo ; Leeuw, J. W. de
KeywordsBiopolymers; ; humic acids; mass spectrometry; pyrolysis; soils
Gas chromatography
Humic acids
Mass spectrometry
Issue Date1988
PublisherTechnische Universiteit Delft
CitationOrigin and chemical nature of soil organic matter: 103-112 (1988)
AbstractA humic acid isolated from a brown soil (Typic Xerochrept) was characterized by analytical pyrolysis and chemical degradation reactions. On Curie-point pyrolysis at 610 °C the humic acid yielded pyrolysis products from polysaccharides, proteins and lignins. Fatty acids and aliphatic hydrocarbons were also released. Acid hydrolysis or persulphate oxidation of the humic acid released polysaccharides, proteins and to some extent lignins and fatty acids, leaving a residue that amounted to ca. 25-30% of the initial weight. Pyrolysis of the humic acid residues \indicated the abundant presence of homologous series of w-alkanes, n-alk-1-enes and a.w-alkadienes. The data suggest that lignin is not a significant contributor to the most resistant part of the humic acid. Other plant components, mainly highly aliphatic biopolymers encountered in plant cuticles and suberin, are probably a significant and resistant part of humic acids.
Description10 pages, 5 figures, 3 tables, 15 references. Trabajo presentado por Cesáreo Sáiz-Jiménez en la tesis doctoral para la obtención del grado de doctor en la Technische Universiteit Delft.
Appears in Collections:(IRNAS) Libros y partes de libros
Files in This Item:
File Description SizeFormat 
Chemical structure of a soil humic acid.pdf406,35 kBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.