Highly effective biosorption of Sr(II) from low level radioactive wastewater

0
- By: , , ,

Courtesy of IWA Publishing

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.

Customer comments

No comments were found for Highly effective biosorption of Sr(II) from low level radioactive wastewater. Be the first to comment!