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GEOREF RECORD

The adsorption mechanism of alpha -amino acids by montmorillonite

B. Siffert and S. Kessaissia
Contribution au mecanisme d'adsorption des alpha -amino-acides par la montmorillonite
Clay Minerals (September 1978) 13 (3): 255-270

Abstract

The investigation of the adsorption of alpha amino-acids at their isoelectric point, on to montmorillonite saturated by mineral cations with various valencies, revealed that the adsorbed quantities depend on the reactivity of the amino-acid towards the mineral cation saturating the smectite. The affinity for amino-acids is more extensive in the case of divalent cations than with monovalent cations; the process is accompanied by a release of mineral cations (exchange). Linear relationships between the quantities of amino-acid taken up and the amounts of cations incorporated into the mineral have been established. These relationships provide means to forecast the behaviour of a given amino-acid towards a montmorillonite saturated by a given cation. They allow the amino-acids to be classified into three families: (1) the amino-acids incorporated in a simple cationic form by ion exchange; (2) the amino-acids leading to the formation of salts and/or coordination complexes with the metal cations; (3) the amino-acids exhibiting an intricate behaviour, and the incorporation of which into the smectite is combined with a polycondensation.


ISSN: 0009-8558
Coden: CLMIAF
Serial Title: Clay Minerals
Serial Volume: 13
Serial Issue: 3
Title: Contribution au mecanisme d'adsorption des alpha -amino-acides par la montmorillonite
Translated Title: The adsorption mechanism of alpha -amino acids by montmorillonite
Pages: 255-270
Published: 197809
Text Language: French
Summary Language: English
Summary Language: German
Summary Language: Spanish
Publisher: Mineralogical Society, London, United Kingdom
References: 23
Accession Number: 1979-017267
Categories: Mineralogy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. tables
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland
Update Code: 1979
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