Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 4: Issue 4
Contribution de l'analyse thermique a l'etude des acides humiques et de leurs sels de sodium
Authors:
M. F. Abrioux Laboratoire de Pédologie Université de Poitiers Poitiers France

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T. Dupuis Laboratoire de Pédologie Université de Poitiers Poitiers France

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P. Jambu Laboratoire de Pédologie Université de Poitiers Poitiers France

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Pages:
383–401
Online Publication Date:
23 Jul 2005
Publication Date:
01 Dec 1972
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf01913798
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The thermal behaviour of humic acids and their sodium salts in oxygen has been studied. The sodium humates were prepared by neutralization of humic acids or by dialysis of their pseudosolutions in sodium hydroxide. Infrared and X-ray diffraction spectra of samples taken between the dissociation steps obtained from the DTA-TG-DTG curves suggest a double mechanism. Below 500°, sodium carbonate and carbon are formed. At 600°, the dissociation of carbonate starts. The residual carbon burns at once at 770°. The extent of reaction changes with the amount of sodium initially present.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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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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