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The effect of gel composition on the uranyl ions adsorption capacity of poly( N ‐vinyl 2‐pyrrolidone‐ g ‐citric acid) hydrogels prepared by gamma rays
Author(s) -
Çaykara Tuncer,
Ören Sinan,
Kantoglu Ömer,
Güven Olgun
Publication year - 2000
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 - 10.1002/1097-4628(20000801)77:5<1037::aid-app10>3.0.co;2-g
Subject(s) - uranyl , self healing hydrogels , aqueous solution , citric acid , 2 pyrrolidone , chemistry , adsorption , uranyl nitrate , swelling , polymer chemistry , nuclear chemistry , inorganic chemistry , chemical engineering , materials science , organic chemistry , ion , uranium , metallurgy , engineering
Poly( N ‐vinyl 2‐pyrrolidone‐ g ‐citric acid) (PVP‐ g ‐CA) hydrogels with varying compositions were prepared from ternary mixtures of N ‐vinyl 2‐pyrrolidone–citric acid–water by using 60 Co γ‐rays. The effect of gel composition on the uranyl ions adsorption capacity of PVP‐ g ‐CA hydrogels was investigated. Uranyl adsorption capacity of these hydrogels were found to be in the range of 18–144 mg [UO 2+ 2 ]/g dry gel from the aqueous solution of uranyl nitrate and 22–156 mg [UO 2+ 2 ]/g dry gel from the aqueous solution of uranyl acetate, depending on the content of citric acid in the hydrogel, while poly( N ‐vinyl 2‐pyrrolidone) hydrogel did not sorb any uranyl ion. The swelling of PVP‐ g ‐CA hydrogel containing 2.7 mol % CA was observed in water (1620%), in uranyl acetate solution (1450%) and in uranyl nitrate solution (1360%), as compared to 700% swelling of pure PVP hydrogels. The diffusion coefficients were varied from 12.57 up to 4.04 • 10 −8 m 2 s −1 . © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 1037–1043, 2000