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Étude Des Isothermes D'Adsorption De Surfactants Ioniques Et Non Ionique Sur Des Fibres De Laine Carbonisée

F. Perineau, J. Molinier, A. Gaset
Published 1980 · Chemistry

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The adsorption isotherms of the three main types of surfactant have been plotted against various pH's and temperatures. It has thus been possible to propose new ways of insuring adsorption and determining the importance of the ionic links and hydrophobic interactions involved in the various-medium conditions considered. The presentations by Lauginuir and Freundlich have permitted to develop the adsorption equations corresponding to each case. Finally, the isotherm plotting in a series of low concentrations has permitted to predict the maximum volume of an effluent purified per kilogram of substrate, in the case of the concentrations frequently found in the waste waters. Les isothermes d'adsorption pour les trois principaux types de surfactant ont ete tracees pour differentes conditions de pH et de temperature. Nous avons ainsi pu proposer des modes d'adsorption, et determiner l'importance des liaisons ioniques et interactions hydrophobes mises en jeu pour les differentes conditions de milieu envisagees. Les representations de Laugmuir et de Freundlich nous out permis par ailleurs de donner les equations d'adsorption dans chacun des cas. Enfin le trace des isothermes sur une gamme de faibles concentrations nous a permis de prevoir le volume maximum d'effluent epure par kg de substrat pour des concentrations rencontrees frequemment dans les eaux residuaires.
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