Nuclear power, fueled by uranium (U), is a mature low-carbon energy technology that plays a crucial role in the transition to a sustainable future . Along with the rapidly expanding nuclear power industry, public concerns regarding its sustainability have arisen. One is the environmental impact, as billions tons U mine tailings have been disposed worldwide due to mining and processing of U ores . Untreated, the tailings derive large quantities of Ucontaining (mg/L level) seepage water . As U is highly hazardous to the biosphere, the seepage water would threaten the eco-system if not properly treated . Another concern is the vulnerability of the global U supply. Current U supply relies on terrestrial ores, which have limited availabilities and could hardly meet the future demand . Hence, recovering U from the seepage water is highly appealing because it not only compensates the depletion of conventional uranium resources but also reduces the negative environmental impact of U mining.