부산대학교 도서관

Activated carbon (AC) has a relatively high efficiency for retaining TcO compared to other materials. AC is used on a vast scale in gas and water purification, metal extraction, medicine and many other applications. The TcO adsorption mechanism on AC is not fully known, however there are assumptions of ion-exchange reaction between AC surface and TcO anions. Adsorption and anion competitive investigation have shown that perchlorate anions have most influence on TcO adsorption. Adsorption properties depend on standard absolute molar enthalpies of hydration. Anion competitiveness was investigated with five samples that were prepared in different ways (this was already published in previous article), we used several anions Cl, Br, ClO, CHCOO, NO, HCOO and SO at different concentrations. In general, the adsorption of TcO is influenced mostly by ClO, what is explained by its similar structure with TcO; however the co-existence of Fe cations in the AC structure decreases TcO adsorption. [ABSTRACT FROM AUTHOR]