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Cation-Exchange Behavior of Clays and Synthetic Aluminosilica Gels

Published online by Cambridge University Press:  01 July 2024

C. H. Chu  and
L. J. Johnson
C. H. Chu
Affiliation:
Department of Agronomy, The Pennsylvania State University, University Park, Pennsylvania 16802
L. J. Johnson
Affiliation:
Department of Agronomy, The Pennsylvania State University, University Park, Pennsylvania 16802
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Abstract

Cation-exchange capacities determined by methylene blue adsorption (CEC MB) and by the amount of K displaced from a K-saturated clay by NH4 (CEC K//NH4) correlate closely in five soil clays from Pennsylvania, but differ greatly in two soil clays with a large content of amorphous material. CEC MB was found to provide a more precise distinction between montmorillonite and vermiculite than CEC K//NH4. Synthetic aluminosilicate gels showed CEC K//NH4 > CEC Ca/Mg > CEC MB, but no relation to the behavior of the two soil clays with a large content of amorphous material was found.

Резюме

Резюме

Катионные обменные способности, определенные с помощью адсорбции метилена синего (КОС МС) и с помощью определения объема К, выделенного из насыщенной К глнны при взаимодействии с NH4 (КОС K//NH4), хорошо коррелируются для пяти почвенных глин из Пенсильвании, но сильно отличаются для двух почвенных глин с большим содержанием аморфного материала. Было обнаружено, что КОС МС обеспечивает более точное различение между монтмориллонитом и вермикулитом, чем КОС K//NH4. Синтетические алюминосиликатные гели показали, что КОС K//NH4 > КОС Ca/Mg > КОС МС, но не было найдено отношения к поведению двух почвенных глин с большим содержанием аморфного материала.

Résumé

Résumé

Les capacités d’échange de cations déterminées par l'adsorption du bleu de méthylène (CEC MB) et par la quantité de K déplacée d'une argile saturée de K par NH4 (CEC K/NH4 sont très proches dans cinq argiles de sol de Pennsylvanie, mais sont très différents dans deux argiles de sol contenant beaucoup de matière amorphe. Il a été trouvé que CEC MB procurait une distinction plus précise entre la montmorillonite et la vermicullite que CEC K/ /NH4. Des gels synthétiques d'aluminosilice montraient CEC/ /NH4 > CEC Ca/Mg > CEC MB, mais il n'a été trouvé aucune relation avec le comportement des deux argiles de sol contenant beaucoup de matière amorphe.

Resüme

Resüme

In fünf Erden aus Pennsylvania sind die Kationenaustauschkapazitäten, welche via Methylenblauadsorption (CEC MB) und durch den Anteil von Kalium, in einem K-gesättigten Ton durch NH4 ersetzt (CEC K/ /NH4), bestimmt wurden, untereinander sehr ähnlich, aber unterscheiden sich sehr in zwei Erden, die viel amorphes Material enthalten. CEC MB zeigte einen präziseren Unterschied zwischen Montmorillonit und Vermiculit als CEC K/ /NH4. Synthetische Aluminosilikatgele zeigten CEC K/ /NH4 >CEC Ca/Mg >CEC MB, aber keine Verbindung zu dem Verhalten der zwei Erden mit dem hohen Gehalt an amorphen Material.

Keywords

Amorphous MaterialCa/MgK//NH4Methylene BlueMontmorilloniteVermiculite
Type
Research Article
Information
Clays and Clay Minerals , Volume 27 , Issue 2 , April 1979 , pp. 87 - 90
Copyright
Copyright © 1979, The Clay Minerals Society

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Footnotes

1

Authorized for publication as Paper No. 5512 in the journal series of the Agricultural Experimental Station, The Pennsylvania State University.

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