Adsorption performance and mechanism of MoS2/BC composite for U(VI) from aqueous solution

A molybdenum disulfide/biochar (MoS 2 /BC) composite was synthesised by a facile hydrothermal process and used for the adsorption of U(VI) from aqueous solution through batch experiments. Results showed that MoS 2 /BC exhibit a saturated adsorption capacity of 451.3 mg/g at pH = 5, t  = 60 min, T  =...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2023-06, Vol.332 (6), p.1743-1754
Main Authors: Zhu, Kaihao, Xian, Han, Peng, Lin, Wang, Shuiyun, Chen, Chunning, Liu, Jinxiang
Format: Article
Language:English
Subjects:
Adsorption
Aqueous solutions
Chemistry
Chemistry and Materials Science
Covalent bonds
Diagnostic Radiology
Functional groups
Hadrons
Heavy Ions
Inorganic Chemistry
Molybdenum disulfide
Nuclear Chemistry
Nuclear Physics
Physical Chemistry
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Summary:A molybdenum disulfide/biochar (MoS 2 /BC) composite was synthesised by a facile hydrothermal process and used for the adsorption of U(VI) from aqueous solution through batch experiments. Results showed that MoS 2 /BC exhibit a saturated adsorption capacity of 451.3 mg/g at pH = 5, t  = 60 min, T  = 298 K, M/V  = 0.02 g/L, C U(VI)  = 10 mg/L, which was higher than that of MoS 2 and biochar. The process of MoS 2 /BC for U(VI) adsorption was better simulated via the pseudo-second-order kinetic model ( R 2  = 0.999) and Langmuir isotherm model ( R 2  = 0.999). The adsorption mechanism of U(VI) includes chemical adsorption, electrostatic attraction, surface complexation of oxygen-containing functional groups, cation- π bond and coordination of S group. After five adsorption–desorption experiments, the elimination rate remained above 80%.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-023-08864-x