TiO_2-SiO_2多孔質ガラスセラミックスのウラニウム吸着能

概要

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Colored TiO_2-SiO_2 porous glass-ceramics, TPGC, which incorporated transition metals, were prepared and their uranium adsorption capacities from an experimental uranium solution and sea water have been investigated. The glass-ceramics were heat-treated to give a crystalline phase of rutile through phase separation. The surface of micropore of TPGC was covered with hydroxyl groups, Ti-OH or Si-OH. The mean pore diameter of TPGC was about 100 Å, the pore volume was about 0.3-0.4 cc・g^<-1>, and the specific surface area was in the range between 100 and 150 m^2・g^<-1>. The uranium adsorption capacity of Co-incorporated TPGC was estimated to be 100 mg-U・g-TPGC^<-1>. The adsorption quantity under 100 ml・h^<-1> liquid flow resulted in 72.5 mg-U・g-TPGC^<-1> at 30℃ and pH 6. The high uranium adsorption capacity shows the potential applicability of TPGC in the recovery of uranium ion from a waste solution.
社団法人日本セラミックス協会の論文
1991-09-01