Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 44: Issue 2
Thermal analysis of montmorillonite-aminotriazole interactions
Authors:
E. Morillo C.S.I.C. Instituto de Recursos Naturales y Agrobiología de Sevilla Apdo. 1052 41080 Sevilla Spain Apdo. 1052 41080 Sevilla Spain

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J. Pérez-Rodríguez Centre Mixto C.S.I.C. Universidad de Sevilla Instituto de Ciencia de Materiales de Sevilla Apdo 1115 41080 Sevilla Spain Apdo 1115 41080 Sevilla Spain

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C. Real Centre Mixto C.S.I.C. Universidad de Sevilla Instituto de Ciencia de Materiales de Sevilla Apdo 1115 41080 Sevilla Spain Apdo 1115 41080 Sevilla Spain

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P. Sánchez-Soto Centre Mixto C.S.I.C. Universidad de Sevilla Instituto de Ciencia de Materiales de Sevilla Apdo 1115 41080 Sevilla Spain Apdo 1115 41080 Sevilla Spain

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Pages:
313–327
Online Publication Date:
06 Jul 2007
Publication Date:
01 Feb 1995
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf02636122
Keywords:
complexes; DTA-TG; EGA-MS; montmorillonite; montmorillonite-aminotriazole complex; organo-clay complex
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Abstract  

In the present investigation, DTA and TG techniques were used to study the thermal behaviour of montmorillonite treated with solutions of the pesticide aminotriazole (AMT), in nitrogen flow. These techniques have been complemented by mass spectrometry of the evolved gases (EGA-MS). AMT is adsorbed in the interlamellar space of montmorillonite as a cation. Results obtained in this study show that this provokes a shift of the dehydroxylation peak of montmorillonite to lower temperatures than those of the untreated clay. Montmorillonite protects the adsorbedAMT, delaying its first decomposition step, and catalysesAMT final decomposition at lower temperatures. The DTA curve of montmorillonite-AMT mechanical mixture differs from the sum of those of the clay mineral and the pesticide heated individually. Montmorillonite dehydroxylation occurs at lower temperature, indicating a complex formation betweenAMT and the mineral during the heating process. However the DTA of the mixture is different from that of the complex previously studied, indicating that in the complex obtained by heating the physical mixtureAMT is adsorbed as neutral molecule or as a product of its decomposition.

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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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