Kinetic and equilibrium of U(VI) biosorption onto the resistant bacterium Bacillus amyloliquefaciens. (July 2019)

• Record Type: Journal Article
• Authors: Liu, Lei; Liu, Jing; Liu, Xiaoting; Dai, Chengwei; Zhang, Zexin; Song, Wencheng; Chu, Yannan
• Is Part Of: Journal of environmental radioactivity. Volume 203(2019)
• Page Start: 117
• Page End: 124
• Publication Date: 2019-07
• Subjects: U(VI) -- Biosorption -- Bacillus amyloliquefaciens -- Kinetic; Radioactivity -- Periodicals; Radiation, Background -- Periodicals; Radioecology -- Periodicals; Radioactive pollution -- Periodicals; Environmental Pollutants -- Periodicals; Radioactive Pollutants -- Periodicals; Radioactivity -- Periodicals; Radioécologie -- Périodiques; Pollution radioactive -- Périodiques; Fond de rayonnement -- Périodiques; 539.752
• DOI: 10.1016/j.jenvrad.2019.03.008
• Languages: English
• ISSNs: 0265-931X

Abstract

Abstract: This study evaluated U(VI) biosorption properties by the resistant bacterium, Bacillus amyloliquefaciens, which was isolated from the soils with residual radionuclides. The effect of biosorption factors (uptake time, pH, ionic concentration, biosorbent dosage and temperature) on U(VI) removal was determined by batch experiments. The uptake processes were characterized by using SEM, FTIR, and XPS. The experimental data of U(VI) biosorption were fitted by the pseudo-second-order. The maximum uptake capacity was 179.5 mg/g at pH 6.0 by Langmuir model. The thermodynamic results: ΔG о, ΔH о and ΔS о for uptake processes were calculated as −6.359 kJ/mol, 14.20 kJ/mol and 67.19 J/mol/K, respectively. The results showed that the biosorption of Bacillus amyloliquefaciens will be an ideal method to remove radionuclides. Graphical abstract: Image 1 Highlights: The B. amyloliquefaciens was isolated from the U-contaminated sites. The oxygen-containing (COOH, OH) and (NH2 ) were the main functional groups related to U(VI) biosorption. The U(VI) biosorption was fitted by the pseudo-second-order kinetic. The biosorption equilibrium can be reached in about 3 h.