ADSORPTION BEHAVIORS OF GERMANIUM(IV) ON THE 1,2-PROPANEDIOL TYPE RESINS

The selective adsorption resins for Ge(IV) with the 1,2-diol type liga nds were prepared by the amination of a chloromethylated styrene-divin ylbenzene beads with 3-dimethylamino-1,2-propanediol (3DMA-PD), 3-diet hylamino-1,2-propanediol (3DEA-PD) and 3-amino-1,2-propanediol (3A-PD) . Ge(IV) was adsorbed on these resins from the neutral or alkaline sol utions. The 3DMA-PD and 3DEA-PD resins exhibited the adsorption capaci ties for Ge(IV) at 1.14 and 0.98 mmol.g-1, respectively, whereas the 3 A-PD resin showed the lower capacity at 0.65 mmol - g-1. The breakthro ugh capacities of the columns packed with 2 cm3 of these resins were e valuated by loading the various buffered solutions of Ge(IV). The Ge(I V) adsorbed in the column was eluted completely with dilute hydrochlor ic acid.