Utilization of m-Phenylenediamine-Furfural Resin for Removal of CuII from Aqueous Solution-A Thermodynamic StudyReportar como inadecuado




Utilization of m-Phenylenediamine-Furfural Resin for Removal of CuII from Aqueous Solution-A Thermodynamic Study - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

E-Journal of Chemistry - Volume 7 2010, Issue 3, Pages 757-762

Chemistry Department, College of Science, Mustansiriya University, Baghdad, Iraq

Received 28 September 2009; Accepted 15 November 2009

Copyright © 2010 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

m-Phenylenediamine was condensed with furfural in absence of catalyst at room temperature. The produced m-phenylenediamine-furfural resin was used for the removal of CuII from aqueous solution. The pH for the optimum removal of CuII was 6. The negative values of Gibbs free energy at low concentration of CuII 20, 30 ppm indicative of the spontaneous adsorption process, while, at higher CuII concentration 40,50 ppm the positive and weak values of ∆G° indicate that the process is feasible but non spontaneous. The values of ∆H° were positive indicating that the sorption process is endothermic. On the other hand, the values of activation energy Ea were inconsistent with the values of ∆H° both are positive and lie in the range of physisorption. The entropy ∆S° of the process was positive indicative of the randomness of the CuII ions at the solid - liquid interface. The values of sticking probability S* were less than one which indicate a preferable adsorption process and the mechanism is physisorption.





Autor: Tariq S. Najim, Israa G. Zainal, and Dina A. Ali

Fuente: https://www.hindawi.com/



DESCARGAR PDF




Documentos relacionados