| 초록 |
Predicting the migration behavior for uranium species in groundwater is necessary for the long-term safety assessment of a deep geological repository for nuclear waste. Since the aqueous speciation of uranium highly affects its migration behavior, reliable thermodynamic data such as complexation constants of various uranium species are required. Many interests have arisen in the complexation of uranly sicliates, since the silicate species are ubiquitous in groundwater with a concentration up to approximately 1.6 mM. Several studies on the complexation of uranly silicate have been reproted in the acidic pH range, but most studies did not consider the solubility limit of amorphous silica and the formation of the first uranly hydrolysis. With these two consdierations, the interaction of uranium(VI) with aqueous silicate in the acidic pH range was studied using time-resolved laser-induced luminescence spectroscopy. |
