화학공학소재연구정보센터
Journal of the Korean Industrial and Engineering Chemistry, Vol.6, No.6, 1004-1011, December, 1995
Cryptand 21 합성수지를 이용한 금속 이온의 흡착 및 분리에 관한 연구
A Study on the Adsorption and Separation of Metal Ions Utilizing Cryptand 21 Synthetic Resin
초록
1%, 2%, 및 20% 다리결합도의 를로로메틸화된 1,4-디비닐벤젠에 cryptand 21 거대고리 리간드를 치환반응으로 결합시키고, 이들 수지로부터 흡착에 미치는 pH, 수지의 다리결합도 그리고 금속 이온 농도의 영향에 대하여 조사하였다. 금속 이온들은 pH 3 이하에서는 잘 흡작되지 않았으나 pH 4 이상에서는 큰 흡착률을 보였으며 금속 이온들의 흡착 평균시간은 약 2시간 이었다. 한편, 에탄을 매질에거의 흡착선택성은 UO2+ > Ni2+ > Ce3+이었으며 1% 다리결합도의 수지를 충진시킨 컬럼에 흡착시킨 후 용리액으로 pH 2.5 HNO3을 사용하여 개별 분리가 가능하였다.
Resins with cryptand 21 macrocyclic ligand attached to chloromethylated styrene-1,4-divinylbenzene by substitution reaction were prepared and the effect of pH, metal concentration and cross-linkage of the matrix on the adsorption for UO22+ , Ni2+ and Ce3+ was investigated. The metal ion was not adsorbed on the resins pH range below 3 and above pH 4, fast adsorption behavior was showed. The resin selectivity determined in ethanol matrix was in increasing order UO22+ > Ni2+ >Ce3+. In addition, these metal ion could be separated on the column packed with 1% crosslinked resin by pH 2.5 HNO3 as an eluent.
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