Uranyl ion binding properties of poly(hydroxamic acid) hydrogels |
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Authors: | Dursun Saraydin Yasemin Isikver Nurettin Sahiner |
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Affiliation: | (1) Cumhuriyet University, Department of Chemistry, Hydrogel Research Laboratory, 58140, Sivas, Turkey e-mail: saraydin@cumhuriyet.edu.tr, TR;(2) Hacettepe University, Department of Chemistry, 06532 Beytepe, Ankara, Turkey, TR |
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Abstract: | Summary
Poly(hydroxamic acid) (PHA) hydrogels, obtained from the synthesis of crosslinked poly(acrylamide) (PAAm) gels have been prepared,
and their uranyl ion binding properties from two different sources were investigated. Swelling and binding parameters of crosslinked
PHA gels were determined from swelling and uranyl ion adsorption studies. The effect of uranyl ion concentration, pH, temperature
and mass of adsorbent on the uranyl ion adsorption were examined. The binding process between PHA and uranyl ions complies
with the S type adsorption according to Giles classification. Free energies of the adsorptions found as negative values indicating
spontaneous adsorption process. The structure and hydrophilicity of the used crosslinkers, the ionogenity of PHA polymers
and the source of uranyl ions found to be effective on the swelling and binding behaviors of PHA hydrogels.
Received: 3 March 2001 / Revised version: 30 June 2001 / Accepted: 9 July 2001 |
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Keywords: | : poly(hydroxamic acid) adsorption uranyl ion swelling binding |
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