Adsorption of A Multifunctional Additive (ZnDTC) Onto Iron and Iron(III) Oxide from n-Decane |
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Authors: | G. Celichowski S. Plaza S. Lagerge S. Partyka J. M. Douillard |
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Affiliation: | 115. Department of Chemical Technology and Environmental Protection, University of ?od?, 163 Pomorska, 90-236, ?od?, Poland 215. Laboratoire des Agrégats Moléculaires et Matériaux Inorganiques, C.N.R.S., Université de Montpellier II, E.S.A 5072 Place Eugène Bataillon, Case 015, 34095, Montpellier Cedex 05, France
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Abstract: | The adsorption of zinc diisooctylodithiocarbamate (ZnDTC) onto iron and iron(III) oxide from n-decane solution was studied. The adsorption isotherms were determined together with the variation of the apparent differential molar enthalpy of displacement for ZnDTC on both adsorbents at 298 K. The shapes of the iostherms for the adsorption of dithiocarbamate on iron and iron(III) oxide are quite different, especially in the low coverage ratio. The corresponding differential molar enthalpies of displacement for the two studied systems are exothermic. On iron, the very high exothermic values indicate a process of ZnDTC chemisorption, while on iron(III) oxide, the much lower enthalpic effects are characteristic of physisorption. |
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