Solvent Effect on the Kinetics of the Exchange of Copper Ions on Na–Montmorillonite

The specific rate coefficients of adsorption of Cu2+on Na–montmorillonite clay in dimethyl sulfoxide (DMSO) and acetone solvents are determined at 20, 30, and 40°C. The reaction is endothermic in nature. It was found that theEvalues range from 3.66 kJ mol−1in acetone to 13.54 kJ mol−1in DMSO, while...

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Published in:Journal of colloid and interface science 1995-12, Vol.176 (2), p.418-421
Main Authors: Hanna, M.T., Zaghloul, A.A., El-Batouti, M., El-Shazly, Sh.A.
Format: Article
Language:English
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copper
kinetics
montmorillonite
Solvent effect
thermodynamics
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container_issue 2
container_start_page 418
container_title Journal of colloid and interface science
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creator Hanna, M.T.
Zaghloul, A.A.
El-Batouti, M.
El-Shazly, Sh.A.
description The specific rate coefficients of adsorption of Cu2+on Na–montmorillonite clay in dimethyl sulfoxide (DMSO) and acetone solvents are determined at 20, 30, and 40°C. The reaction is endothermic in nature. It was found that theEvalues range from 3.66 kJ mol−1in acetone to 13.54 kJ mol−1in DMSO, while at 20°C, the rate constantkvaries from 3.34 (ppm)1−nper second in DMSO to 16.07 (ppm)1−nper second in acetone. The data have been analyzed to obtain activation parameters ΔG*, ΔH*, and ΔS* for reaction in corresponding mixtures. A reaction mechanism which describes the copper ion exchange reaction is proposed.
doi_str_mv 10.1006/jcis.1995.9950
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subjects copper
kinetics
montmorillonite
Solvent effect
thermodynamics
title Solvent Effect on the Kinetics of the Exchange of Copper Ions on Na–Montmorillonite
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