J Mater Sci Technol ›› 2002, Vol. 18 ›› Issue (01): 57-59.

• Research Articles • Previous Articles     Next Articles

Preparation of a Cation Exchanger from Cork Waste: Thermodynamic Study of the Ion Exchange Processes

M.Gómez Corzo, A.Macías-García, M.A. Díaz-Díezand M.Gómez Corzo, M.J.Bernalte Garcí   

  1. Department of Inorganic Chemistry, Faculty of Science, University of Extremadura, 06071-Badajoz, Spain...
  • Received:1900-01-01 Revised:1900-01-01 Online:2002-01-28 Published:2009-10-10
  • Contact: A.Macías-García

Abstract: An ion exchanger was prepared by sulfonation of cork-waste chars. The exchange properties of the resultant material were characterized using Na+, Ca2+ or Fe3+ aqueous solutions. The content of metal ions in the solutions were determined by atomic absorption spectrometry. On the basis of the results obtained, the chemical equilibrium and its thermodynamic aspects related to the ion exchange process were studied. It was found that equilibrium constant K varies by the order: Na+0 and ΔSο>0, with -ΔGο following the sequence: Ca2+>Na+>Fe3+

Key words: Cork, Cation exchanger, Char, Sulfonation, Equilibrium, Thermodynamic