Adsorptive Removal of Uranium from Water by Sulfonated Phenol-Formaldehyde Resin


Atun G. , Ortaboy S.

JOURNAL OF APPLIED POLYMER SCIENCE, vol.114, no.6, pp.3793-3801, 2009 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 114 Issue: 6
  • Publication Date: 2009
  • Doi Number: 10.1002/app.31004
  • Title of Journal : JOURNAL OF APPLIED POLYMER SCIENCE
  • Page Numbers: pp.3793-3801

Abstract

Adsorption characteristics of a sulfonated phenol-formaldehyde resin (SPR) have been studied for U removal from aqueous solution by means of batch method. Adsorption experiments have been carried out as a function of contact time, solution/adsorbent ratio, particle size and pH. Adsorption isotherm has been evaluated by changing adsorbent dosage in the range of 0.04-80 g/L at an initial uranyl nitrate concentration of 0.05 mol/L. The enormous adsorption capacity of 0.29 mol/g estimated from the plateau region of the S shaped isotherm is well comparable the Langmuir capacity of 0.31 mol/g. Equilibrium data are also adequately well described by the Freundlich and the Dubinin-Radushkevich (D-R) isotherm equations. The parameters of the isotherms and pH dependency of distribution coefficients (K-D) indicate that polymeric uranyl chains form on bidentate surface complex as a result of solute-solute interactions on the adsorbent surface. Both desorption and elution studies show that uranyl chains are irreversibly bounded on the SPR. Kinetic curves having a fast initial part followed by a slower process well fit both McKay model based on two-resistance diffusion and Nernst-Plank model with single diffusion coefficient. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 114: 3793-3801, 2009