Journal of the Korean Industrial and Engineering Chemistry, Vol.13, No.8, 765-770, December, 2002
1-Aza-15-Crown-5 합성수지 흡착제에 의한 우라늄(VI) 이온의 흡착
Adsorption of Uranium(VI) Ion on the 1-Aza-15-Crown-5 Synthetic Resin Adsorbent
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초록
1%, 2%, 4% 및 20%의 가교도를 가진 스틸렌 디비닐벤젠 공중합체에 1-aza-15-crown-5 거대고리 리간드를 치환반응으로 결합시켜 수지들을 합성하였다. 이들 수지의 합성은 염소 함량과 원소 분석 그리고 IR-스펙트럼으로 확인하였다. 수지 흡착제에 의한 우라늄 이온의 흡착에 미치는 pH, 시간, 수지의 가교도 그리고 용매의 유전상수에 따른 영향들을 조사하였다. 우라늄 이온은 pH 3 이상에서 큰 흡착율을 보였으며, 금속 이온들의 흡착 평형은 2 h정도였다. 한편, 에탄올 용매에서 수지에 대한 흡착 선택성은 UO22+>Cu2+>Sm3+ 이온이었고, 우라늄 이온의 흡착력은 1%, 2%, 4% 및 20%의 가교도 순 이었으며, 용매의 유전상수 크기에 반비례하였다.
Resins were synthesized by mixing 1-aza-15-crown-5 macrocyclic ligand into styrene divinylbenzene (DVB) copolymer, which contains crosslink of 1%, 2%, 4% and 20% by substitution reaction. The synthesis of these resins was confirmed by the content of chlorine, the element analysis and the IR-Spectrum. The effects of pH, time, crosslink of resins and dielectric constant of solvent on the adsorption of uranium ion by resin adsorbent were investigated. Uranium ion showed a great adsorption at pH higher than 3, and the adsorption equilibrium of metal ions was about two hours. In addition, the adsorptive selectivity of resin in ethanol solvent was UO22+>Cu2+>Sm3+ in order. The adsorption of uranium ion was 1%, 2%, 4% and 20%, which corresponded to the order of crosslink and it was inversely proportional to the order of dielectric constant of solvents.
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