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Updated: Apr 11, 2026

Automated 90Sr Separation and Preconcentration in a Lab-on-Valve System at Ppq Level
Published on: June 6, 2018
Highly effective biosorption of Sr(II) from low level radioactive wastewater
Xun Liu1, Wenyuan Hu1, Xiaojun Huang2
1State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, 621010 Mianyang, China
Abstract:
Bacillus subtilis was first used to remove Sr(II) from low-level radioactive wastewater. Influence parameters, biosorption kinetics and biosorption equilibrium were investigated. The results showed that the maximum adsorption capacity of Sr(II) at over 2,000 mg g(-1) by Bacillus subtilis was higher than for other biosorbents. At pH 6.3, Sr(II) concentration of 15 mg L(-1), biomass dosage of 0.3 g L(-1) and temperature of 20 °C, the maximum removal efficiency was as high as 96.3% at 1,440 minutes. The biosorption kinetics and the equilibrium isotherm data can be described by the pseudo-second-order equation and Freundlich isotherm equation, respectively. The negative values of ΔG and the positive values of ΔH implied that Sr(II) biosorption on Bacillus subtilis was a spontaneous and endothermic process. Fourier transform infrared spectroscopy indicated that the functional groups, hydroxyl, carboxylate and amide groups, might participate in the interaction between Sr(II) and Bacillus subtilis.
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