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Mechanisms of interaction between montmorillonite and 3-aminotriazole

Published online by Cambridge University Press:  09 July 2018

E. Morillo ,
J. L. Pérez-Rodríguez  and
C. Maqueda
E. Morillo
Affiliation:
Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, Aptdo. 1052, 41080 Sevilla, Spain
J. L. Pérez-Rodríguez
Affiliation:
Instituto de Ciencia de Materiales, CSIC, Sevilla, Aptdo. 1052, 41080 Sevilla, Spain
C. Maqueda
Affiliation:
Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, Aptdo. 1052, 41080 Sevilla, Spain
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Abstract

The adsorption of aminotriazole, at its solution pH, with montmorillonite saturated with different cations has been studied. A pesticide-montmorillonite complex is formed through interlamellar cations which are not displaced. Aminotriazole is situated mostly as a polarized molecule around Mg2+ and Zn2+ cations, removing a great amount of water. In Na+- and Li+-montmorillonite, the pesticide remains as a non-polarized molecule, hydration water being retained in the interlamellar space; the pesticide is coordinated to interlamellar cations through water bridges. For all samples a proportion of cationic aminotriazole is also adsorbed, the amount being greater with increasing polarizing power of the interlamellar cation; consequently, in Fe3+-montmorillonite all the aminotriazole adsorbed is in the cationic form.

Type
Research Article
Information
Clay Minerals , Volume 26 , Issue 2 , June 1991 , pp. 269 - 279
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1991

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