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|Type:||Artigo de periódico|
|Title:||Thermodynamics Of The Nickel, Cobalt And Zinc Removal From Ethanolic Solution By P-aminobenzoic Acid Intercalated On Layered Calcium Phosphate|
|Author:||De Souza F.M.|
|Abstract:||Crystalline lamellar calcium phosphate retained p-aminobenzoic acid inside its cavity without leaching. The adsorption isotherms from ethanol gave the maximum adsorption capacities of 6.44, 3.34 and 1.62 mmol g-1 for nickel, cobalt and zinc, respectively. The energetic effects caused by metallic cation interactions were determined through calorimetric titration at the solid/liquid interface and gave a net thermal effect that enabled enthalpy and equilibrium constant calculations. Complete thermodynamic data composed of exothermic enthalpy, negative free Gibbs energy and positive entropy conformed to a set of favorable cation/basic center interactions, to indicate that these materials could be useful tools to eliminate undesirable cations from ethanolic systems. © 2014 Elsevier B.V.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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