Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/87495
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.
Dias A.P.B.
Babeto B.
Pelisson S.
Lazarin A.M.
Sernaglia R.L.
Andreotti E.I.S.
Airoldi C.
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.
Editor: Elsevier
Rights: fechado
Identifier DOI: 10.1016/j.tca.2014.05.017
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-84902173696&partnerID=40&md5=5e981db933c3b6f069cb1dfebe1832d8
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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