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

Lei Liu; Jing Liu; Xiaoting Liu; Chengwei Dai; Zexin Zhang; Wencheng Song; Yannan Chu

doi:10.1016/j.jenvrad.2019.03.008

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

J Environ Radioact. 2019 Jul:203:117-124. doi: 10.1016/j.jenvrad.2019.03.008. Epub 2019 Mar 18.

Authors

Lei Liu¹, Jing Liu², Xiaoting Liu³, Chengwei Dai³, Zexin Zhang², Wencheng Song⁴, Yannan Chu⁵

Affiliations

¹ Anhui Province Key Laboratory of Medical Physics and Technology, Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, PR China; University of Science and Technology of China, Hefei, 230026, PR China; School of Environment and Chemical Engineering, Anhui Vocational and Technical College, Hefei, 230011, PR China.
² Anhui Province Key Laboratory of Medical Physics and Technology, Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, PR China.
³ School of Environment and Chemical Engineering, Anhui Vocational and Technical College, Hefei, 230011, PR China.
⁴ Anhui Province Key Laboratory of Medical Physics and Technology, Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, PR China. Electronic address: wencsong@cmpt.ac.cn.
⁵ Anhui Province Key Laboratory of Medical Physics and Technology, Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, PR China. Electronic address: ychu@aiofm.ac.cn.

PMID: 30897483
DOI: 10.1016/j.jenvrad.2019.03.008

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.

Keywords: Bacillus amyloliquefaciens; Biosorption; Kinetic; U(VI).

MeSH terms

Adsorption
Bacillus amyloliquefaciens / metabolism*
Biodegradation, Environmental*
Kinetics
Thermodynamics
Uranium / metabolism*
Water Pollutants, Radioactive / metabolism*

Substances

Water Pollutants, Radioactive
Uranium