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Differential behaviour of Fe(III)- and Cu(II)-montmorillonite with aniline: I. Suspensions with constant solid: liquid ratio

Published online by Cambridge University Press:  09 July 2018

A. Moreale ,
P. Cloos  and
C. Badot
A. Moreale
Affiliation:
Groupe de Physico-Chimie Minérale et de Catalyse, Laboratoire de Chimie Organo-Minérale, Université Catholique de Louvain, Place Croix du Sud 1, B-1348 Louvain-la-Neuve, Belgium
P. Cloos
Affiliation:
Groupe de Physico-Chimie Minérale et de Catalyse, Laboratoire de Chimie Organo-Minérale, Université Catholique de Louvain, Place Croix du Sud 1, B-1348 Louvain-la-Neuve, Belgium
C. Badot
Affiliation:
Groupe de Physico-Chimie Minérale et de Catalyse, Laboratoire de Chimie Organo-Minérale, Université Catholique de Louvain, Place Croix du Sud 1, B-1348 Louvain-la-Neuve, Belgium
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Abstract

Aniline, adsorbed from aqueous solution in 1% (w/v) clay suspensions, forms coloured complexes and polymerizes on Fe(III)- and Cu(II)-montmorillonite. As evidenced by the adsorption isotherms, and the coloration and spectroscopic (IR, ESR) characteristics of the organo-clay associations formed, the conditions under which these reactions take place and the mechanisms involved differ according to the exchange cation. Fe(III) interacts with the π electrons of the aromatic ring to give rise to radical cations or so-called type II complexes, provided the aniline concentration does not exceed 500 p.p.m. With Cu(II). an aniline concentration above 500 p.p.m. is required and the reaction occurs at the amine group, proceeding through coordination followed by free-radical formation.

Type
Research Article
Information
Clay Minerals , Volume 20 , Issue 1 , March 1985 , pp. 29 - 37
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1985

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