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Adsorption of Uranium(Ⅵ) Ion Wtilizing Cryptand Ion Exchange Resin
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2004, v.17 no.2, pp.91-97
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(2004). Adsorption of Uranium(Ⅵ) Ion Wtilizing Cryptand Ion Exchange Resin. Analytical Science and Technology, 17(2), 91-97.
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Abstract
Cryptand ion exchange resins were synthesized with 1-aza-15-crown-5 macrocyclic ligand attached to styrene divinylbenzene (DVB) copolymer with crosslink of 1%, 2%, 5% and 10% by substitution reaction. The synthesis of these resins was confirmed by content of chlorine, element analysis, and IR-spectrum. The effects of pH, time, dielectric constant of solvent and crosslink on adsorption of uranium (UO22+) ion were investigated. The uranium ion was showed fast adsorption on the resins above pH 3. The optimum equilibrium time for adsorption of metallic ions was about two hours. The adsorption selectivity determined in ethanol was in increasing order uranium (UO22+), magnesium (Mg2+), neodymium (Nd3+) ion. The adsorption was in order of 1%, 2%, 5%, and 10% crosslink resin and adsorption of resin decreased in proportion to order of dielectric constant of solvents.
- keywords
- 1-aza-15-crown-5, crosslink, styrene, macrocyclic ligand
Reference
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