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Effect of pH, ionic strength, and temperature on uranyl ion adsorption by poly( N ‐vinyl 2‐pyrrolidone‐ g ‐tartaric acid) hydrogels
Author(s) -
Ören Sinan,
Çaykara Tuncer,
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(20001213)78:12<2219::aid-app200>3.0.co;2-x
Subject(s) - uranyl , self healing hydrogels , 2 pyrrolidone , ionic strength , adsorption , tartaric acid , chemistry , polymer chemistry , electrolyte , swelling , ternary operation , nuclear chemistry , chemical engineering , inorganic chemistry , aqueous solution , materials science , ion , organic chemistry , citric acid , composite material , electrode , engineering , computer science , programming language
Poly‐electrolyte N ‐vinyl 2‐pyrrolidone‐ g ‐tartaric acid (PVP‐ g ‐TA) hydrogels with varying compositions were prepared in the form of rods from ternary mixtures of N ‐vinyl 2‐pyrrolidone/tartaric acid/water. The effect of external stimuli, such as the solution pH, ionic strength, and temperature, on uranyl adsorption by these hydrogels was investigated. Uranyl adsorption capacities of the hydrogels were determined to be 53.2–72.2 (mg UO 2+ 2 /g dry gel) at pH 1.8, and 35.3–60.7 (mg UO 2+ 2 /g dry gel) at pH 3.8, depending on the amount of TA in the hydrogel. The adsorption studies have shown that the temperature and the ionic strength of the swelling solution also influence uranyl ion adsorption by PVP‐ g ‐TA hydrogels. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 2219–2226, 2000