Karadag, E (Karadag, Erdener); Uzum, OB (Uzum, Omer Baris);
Kundakci, S (Kundakci, Semiha); Saraydin, D (Saraydin, Dursun)
Polyelectrolyte CASA hydrogels for uptake of uranyl ions from
Source: JOURNAL OF APPLIED POLYMER SCIENCE, 104 (1):
200-204 APR 5 2007
Keywords: acrylamide; hydrogel; swelling; sorption; uranyl
Plus: ACID HYDROGELS; ADSORPTION; REMOVAL; WATER;
DIMETHACRYLATE; URANIUM; BEADS
In this study, uranyl ion adsorption from aqueous solutions has
been investigated by chemically crosslinked acrylamide/sodium
acrylate (CASA) hydrogels. Adsorption studies were investigated
by the spectroscopic method. CASA hydrogels with various
compositions were prepared from ternary mixtures of acrylamide
(A), sodium acrylate (SA), and water by free radical
polymerization in aqueous solution, using multifunctional
crosslinkers such as ethylene glycol dimethacrylate (EGDMA).
Uranyl ion adsorption from aqueous solutions was studied by the
batch sorption technique at 25 degrees C. The effect of uranyl
ion concentration and mass of adsorbent on the uranyl ion
adsorption were examined. In experiments of sorption, L-type
sorption in the Giles classification system was found. Some
binding parameters, such as initial binding constant (K-i),
equilibrium constant (K), monolayer coverage (n), site-size
(it), and maximum fractional occupancy ((O) over cap) for the
CASA hydrogel-uranyl ion binding system, were calculated using
the Langmuir linearization method. Finally, the amount of sorbed
uranyl ion per gram of dry hydrogel (q) was calculated to be
4.44 x 10(-4)-14.86 x 10(-4) mol uranyl ion per gram for CASA
hydrogels. Adsorption of uranyl ion (percentage) was changed
within a range of 12.86-46.71%. (c) 2007 Wiley Periodicals, Inc.
Adnan Menderes Univ, Dept Chem, Fen Edebiyat Fac, TR-09010 Aydin,
Turkey; Cumhuriyet Univ, Dept Chem, TR-58140 Sivas, Turkey
Address: Karadag, E, Adnan Menderes Univ, Dept Chem, Fen
Edebiyat Fac, TR-09010 Aydin, Turkey.
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Source Abbrev.: J APPL POLYM SCI
Abbrev.: J. Appl. Polym. Sci.
Page Count: 5
Category: Polymer Science