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Adsorption Characteristic of Rare Earth Metal Ions on 1-Aza-15-Crown-5-Styrene (Hazardous Materials)-DVB Resin  

Roh, Gi-Hwan (Department of Environmental Sanitation, Gwangju Health College)
Kim, Kwan-Chun (Department of Environmental Sanitation, Gwangju Health College)
Kim, Sun-Hwa (Department of Environmental Sanitation, Gwangju Health College)
Kim, Joon-Tae (Department of Chemistry, Chosun University)
Publication Information
Applied Chemistry for Engineering / v.20, no.1, 2009 , pp. 21-27 More about this Journal
Abstract
Resins were synthesized by mixing 1-aza-15-crown-5 macrocyclic ligand attached to styrene (a hazardous material) divinylbenzene (DVB) copolymer with crosslink of 1％, 2％, 5％ and 20％ by a substitution reaction. The characteristic of these resins was confirmed by the content of chlorine, element analysis, thermogravimetric analysis (TGA), surface area (BET), and IR-spectroscopy. The effects of pH, time, dielectric constant of solvents and crosslink on adsorption of metal ions by the synthetic resin adsorbent were investigated. The metal ion was showed a 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 of uranium ($UO_2^{2+}$) > manganese ($Mn^{2+}$) > praseodymium ($Pr^{3+}$). The adsorption was in the order of 1％, 2％, 5％, and 20％ crosslink resin and adsorption of resin decreased in proportion to the order of dielectric constant of solvents.
Keywords
1-aza-15-crown-5; macrocyclic ligand; crosslink; styrene; divinylbenzene;
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