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Interaction of Aliphatic Amines with Montmorillonite to Enhance Adsorption of Organic Pollutants

Published online by Cambridge University Press:  02 April 2024

Timothy A. Wolfe ,
Turgut Demirel  and
E. Robert Baumann
Timothy A. Wolfe*
Affiliation:
Department of Civil Engineering, Engineering Research Institute, Iowa State University, Ames, Iowa 50011
Turgut Demirel
Affiliation:
Department of Civil Engineering, Engineering Research Institute, Iowa State University, Ames, Iowa 50011
E. Robert Baumann
Affiliation:
Department of Civil Engineering, Engineering Research Institute, Iowa State University, Ames, Iowa 50011
*
1Present address: Department of Civil Engineering, Cleveland State University, Cleveland, Ohio 44115.
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Abstract

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X-ray powder diffraction studies were performed with propyl-, dodecyl-, and dodecyldiam-monium bentonites saturated with aqueous mixtures of eleven organic pollutants at concentrations of 0.01 to 100%. The alkylammonium salt treatment separated the montmorillonite unit layers, which increased the interlamellar volume and exposed the interlamellar surfaces for adsorption of the organic pollutants. Washing the salt-treated clays with distilled water removed excess, physically adsorbed alkylammonium ions that could interfere with adsorption of the organic pollutants. Adsorption isotherms conducted at organic pollutant concentrations of 100 and 1000 mg/liter indicated the three alkylammonium montmorillonites, especially propylammonium montmorillonite, were effective adsorbents from aqueous solution, but to a lesser extent than adsorbents currently used in the water and wastewater fields.

Keywords

AdsorptionAmineBentoniteMontmorillonitePollutantX-ray powder diffraction
Type
Research Article
Information
Clays and Clay Minerals , Volume 33 , Issue 4 , August 1985 , pp. 301 - 311
Copyright
Copyright © 1985, The Clay Minerals Society

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