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Adsorptive removal of uranium from water by sulfonated phenol–formaldehyde resin
Author(s) -
Atun Gülten,
Ortaboy Sinem
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.31004
Subject(s) - adsorption , freundlich equation , uranyl , chemistry , desorption , aqueous solution , langmuir , uranyl nitrate , diffusion , uranium , langmuir adsorption model , nuclear chemistry , materials science , thermodynamics , organic chemistry , ion , physics , metallurgy
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. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009