Fig. 1. OD₆₀₀ (a) and pH values (b) of Sporosarcina pasteurii for different uranium concentrations and initial pH values

Fig. 2. Effect of reaction time on U, Ca²⁺ removal rates (a) and solution pH (b)

Fig. 3. Effect of initial pH on U, Ca²⁺ removal rates and solution pH

Fig. 4. Effect of initial uranium concentration on U, Ca²⁺ removal rates and solution pH

Fig. 5. Effect of calcium concentration on U, Ca²⁺ removal rates and solution pH

Fig. 6. Effect of molar ratio of calcium ion to urea on U, Ca²⁺ removal rates and solution pH

Fig. 7. Effect of bacterial solution concentration on U, Ca²⁺ removal rates and solution pH

Fig. 8. SEM mapping of carbonate-uranium co-precipitation induced by Bacillus pasteurianus(a) 3 000 times, (b) 30 000 times, (c) 5 000 times

Fig. 9. XRD spectra of carbonate precipitation induced by Bacillus pasteurianus