Adsorption performance of Enterobacter cloacae towards U(VI) ion and application of Enterobacter cloacae/carbon nanotubes to preconcentration and determination of low-levels of U(VI) in water samples
Mohammadzadeh A. Kadhim M.M. Taban T.Z. Baigenzhenov O. Ivanets A. Lal B. Kumar N. Hosseini-Bandegharaei A.
January 2023Elsevier Ltd
Chemosphere
2023#311
Keeping the high potential of some microorganisms in adsorption of radionuclides in view, the adsorption properties of Enterobacter cloacae towards uranium were attentively scrutinized, and then it was used for preconcentration of uranium in different samples, using Enterobacter cloacae/carbon nanotube composite. First, using ultrasonic agitation, the effects of operational factors on biosorption of uranium on the inactive Enterobacter cloacae were appraised and modeled by central composite design, and a comprehensive study was performed on the equilibrium, kinetics, thermodynamic, and selectivity aspects of biosorption. The optimization studies along with the evaluations of the adsorption properties revealed that Enterobacter cloacae have a high affinity for fast and selective biosorption of uranium ions, at pH 5.1. Second, the Enterobacter cloacae/carbon nanotube was synthesized, characterized, and utilized for preconcentration of uranium in different samples, using a mini-column packed with the composite. The optimization of operational factors on recovery of uranium, using the central composite design, showed that uranium can be quantitively adsorbed at a sample flow rate lower than 4.5 mL min−1 and the desorption could be accomplished with 3.0 mL HCl 0.6 M solution. Finally, the mini-column was exploited for preconcentration and determination of uranium in different samples. The results revealed the low detection limit (0.015 μg.L−1), high precision (RSDs ≤3.92%), and good accuracy of the proposed procedure.
Biosorption , Enterobacter cloacae , Multi-walled carbon nanotubes , Preconcentration , Uranium
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Department of Microbiology, Faculty of Medicine, Infectious Diseases Research Center, Gonabad University of Medical Sciences, Gonabad, Iran
Medical Laboratory Techniques Department, Al-Farahidi University, Baghdad, Iraq
Laser and Optoelectronics Engineering Department, Kut University College, Wasit, Kut, 52001, Iraq
Department of Metallurgical Sciences, Satbayev University, 22a Satbaev Str., Almaty, 050013, Kazakhstan
Institute of General and Inorganic Chemistry of National Academy of Sciences of Belarus, St. Surganova 9/1, Minsk, 220072, Belarus
Department of Chemistry, Institute of Applied Science and Humanities, GLA University, Mathura, 281406, India
Department of Chemistry, Maharshi Dayanand University, Rohtak, 124001, India
Faculty of Chemistry, Semnan University, Semnan, Iran
Department of Microbiology
Medical Laboratory Techniques Department
Laser and Optoelectronics Engineering Department
Department of Metallurgical Sciences
Institute of General and Inorganic Chemistry of National Academy of Sciences of Belarus
Department of Chemistry
Department of Chemistry
Faculty of Chemistry
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