Morphological, transport, and adsorption properties of ethylene vinyl acetate/polyurethane/bentonite clay composites

Derrick S. Dlamini

Department of Chemical Technology, University of Johannesburg, P. O. Box 17011, Doornfontein 2028, Johannesburg, South Africa

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Ajay K. Mishra,

Corresponding Author

Ajay K. Mishra

[email protected]

Department of Chemical Technology, University of Johannesburg, P. O. Box 17011, Doornfontein 2028, Johannesburg, South Africa

Department of Chemical Technology, University of Johannesburg, P. O. Box 17011, Doornfontein 2028, Johannesburg, South Africa===Search for more papers by this author

Bhekie B. Mamba,

Bhekie B. Mamba

Department of Chemical Technology, University of Johannesburg, P. O. Box 17011, Doornfontein 2028, Johannesburg, South Africa

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Derrick S. Dlamini,

Derrick S. Dlamini

Department of Chemical Technology, University of Johannesburg, P. O. Box 17011, Doornfontein 2028, Johannesburg, South Africa

Search for more papers by this author

Ajay K. Mishra,

Corresponding Author

Ajay K. Mishra

[email protected]

Department of Chemical Technology, University of Johannesburg, P. O. Box 17011, Doornfontein 2028, Johannesburg, South Africa

Department of Chemical Technology, University of Johannesburg, P. O. Box 17011, Doornfontein 2028, Johannesburg, South Africa===Search for more papers by this author

Bhekie B. Mamba,

Bhekie B. Mamba

Department of Chemical Technology, University of Johannesburg, P. O. Box 17011, Doornfontein 2028, Johannesburg, South Africa

Search for more papers by this author

First published: 11 December 2011

https://doi.org/10.1002/app.35600

Citations: 9

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Abstract

The effect of polyurethane (PU) foam on the morphological and transport properties of ethylene vinyl acetate (EVA) with 9% vinyl acetate and the potential application of 3%bentonite/28.5% PU/68.5% EVA composites fabricated via the melt-blending method in heavy-metal extraction from water systems were investigated. EVA did not swell in water, whereas the PU/EVA blend attained a maximum percentage of deionized water uptake of 2.158 mol %. A 3% bentonite/28.5% PU/68.5% EVA composite blend successfully removed 90% of Pb²⁺ from an aqueous solution with an initial concentration of 30 mg/L, whereas 3% bentonite/97% EVA could only extract 7.323% of Pb²⁺ ions. Pb²⁺ adsorption was found to obey the Langmuir adsorption isotherm and pseudo-second-order kinetic model. Thermodynamic studies demonstrated that the adsorption was favorable at room temperature and the uptake of Pb²⁺ was mostly by physical adsorption, as also indicated by the value n = 2.449 (where n is an empirical parameter indicating transport mode) from the Freundlich adsorption isotherm. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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Volume124, Issue6

15 June 2012

Pages 4978-4985

Morphological, transport, and adsorption properties of ethylene vinyl acetate/polyurethane/bentonite clay composites

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Morphological, transport, and adsorption properties of ethylene vinyl acetate/polyurethane/bentonite clay composites

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