1991 Volume 99 Issue 1153 Pages 763-767
Colored TiO2-SiO2 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 100Å, the pore volume was about 0.3-0.4cc·g-1, and the specific surface area was in the range between 100 and 150m2·g-1. The uranium adsorption capacity of Co-incorporated TPGC was estimated to be 100mg-U·g-TPGC-1. The adsorption quantity under 100ml·h-1 liquid flow resulted in 72.5mg-U·g-TPGC-1 at 30°C and pH 6. The high uranium adsorption capacity shows the potential applicability of TPGC in the recovery of uranium ion from a waste solution.
