Geopolymers
Inorganic polymeric new materials
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N. Barros
N. Barros
Department of Applied Physics, Faculty of Physics, University of Santiago de Compostela, Santiago de Compostela, Spain
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J. Salgado
J. Salgado
Department of Applied Physics, Faculty of Physics, University of Santiago de Compostela, Santiago de Compostela, Spain
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M. Villanueva
M. Villanueva
Department of Applied Physics, Faculty of Physics, University of Santiago de Compostela, Santiago de Compostela, Spain
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J. Rodriquez-Añón
J. Rodriquez-Añón
Department of Applied Physics, Faculty of Physics, University of Santiago de Compostela, Santiago de Compostela, Spain
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J. Proupin
J. Proupin
Department of Applied Physics, Faculty of Physics, University of Santiago de Compostela, Santiago de Compostela, Spain
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S. Feijóo
S. Feijóo
Department of Applied Physics, Faculty of Physics, University of Santiago de Compostela, Santiago de Compostela, Spain
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M. Martín-Pastor
M. Martín-Pastor
Unidad de Resonancia Magnética, RIAIDT, Edif. Cactus, University of Santiago de Compostela, Santiago de Compostela, Spain
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Abstract
The environmental concern on soil exploitation, linked to global warming by the Kyoto protocol, is responsible for increasing interest in the understanding of the role of the composition and structure of the soil organic matter (SOM) on soil carbon, C, dynamics. Thermal analysis and nuclear magnetic resonance (NMR) are applied to study the thermal properties, the structure and composition of the SOM of six samples with different C contents in order to improve the interpretation of results given by thermal analysis. Results showed that the direct integral of the combustion peaks obtained by DSC and the percentage of SOM given by TG were both directly related to the quantity of total soil C. Thus, soils with higher C content showed higher energy content too. The combustion temperatures of the curves given by DSC are those reported for labile OM. NMR results indicated the presence of aliphatic C, carbohydrates, and a weak signal in the aromatic C band in all the samples that was not detected in the DSC curves. Only two samples showed carboxyl/carbonyl C which was not detected by DSC also.
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| Journal of Thermal Analysis and Calorimetry | |
|---|---|
| Language | English |
| Size | A4 |
| Year of Foundation |
1969 |
| Volumes per Year |
1 |
| Issues per Year |
24 |
| Founder | Akadémiai Kiadó |
| Founder's Address |
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. |
| Publisher | Akadémiai Kiadó Springer Nature Switzerland AG |
| Publisher's Address |
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11. |
| Responsible Publisher |
Chief Executive Officer, Akadémiai Kiadó |
| ISSN | 1388-6150 (Print) |
| ISSN | 1588-2926 (Online) |
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Temperature dependence of the rate of reaction in thermal analysis
The Arrhenius equation in condensed phase kinetics
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