Performance and mechanism of U(VI) removal from solution by pomegranate peel carbon supported CaTiO<sub>3</sub> composites

GONG Yi; LI Xiaoyan; ZHANG Yishuo; LI Kun; LI Mingzhe; CAO Xiaogang; DU Yanjun; LIU Bo

doi:10.13801/j.cnki.fhclxb.20230817.004

Volume 41 Issue 3

Mar. 2024

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GONG Yi, LI Xiaoyan, ZHANG Yishuo, et al. Performance and mechanism of U(VI) removal from solution by pomegranate peel carbon supported CaTiO3 composites[J]. Acta Materiae Compositae Sinica, 2024, 41(3): 1327-1337. doi: 10.13801/j.cnki.fhclxb.20230817.004

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GONG Yi, LI Xiaoyan, ZHANG Yishuo, et al. Performance and mechanism of U(VI) removal from solution by pomegranate peel carbon supported CaTiO₃ composites[J]. Acta Materiae Compositae Sinica, 2024, 41(3): 1327-1337. doi: 10.13801/j.cnki.fhclxb.20230817.004

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Performance and mechanism of U(VI) removal from solution by pomegranate peel carbon supported CaTiO₃ composites

doi: 10.13801/j.cnki.fhclxb.20230817.004

1.
Jiangxi Province Nuclear Radiation Detection and Application Engineering Research Center, East China University of Technology, Nanchang 330013, China
2.
Jiangxi Province Radiation Environment Supervision Station, Nanchang 330013, China

Funds: National Natural Science Foundation of China (41761090; 12105044); Graduate Innovation Foundation of East China University of Technology of Jiangxi Province (YC2022-s614)

Received Date: 2023-06-02
Accepted Date: 2023-08-03
Rev Recd Date: 2023-07-16

Available Online: 2023-08-18

Publish Date: 2024-03-01

Abstract

Abstract

In order to achieve the goal of green and efficient energy utilization, how to deal with uranium-containing waste generated during the development of nuclear energy has become an increasingly prominent environmental problem. The CaTiO₃ materials were initially prepared using the solvent-thermal method. Subsequently, the carbon material was synthesized by grinding a mixture of CaTiO₃ and pomegranate peel carbon material, resulting in the formation of carbon-loaded CaTiO₃ (C@CaTiO₃). Modern characterization techniques were employed to analyze the morphological and compositional changes of C@CaTiO₃ before and after its reaction with U(VI). The performance of the material in removing uranium from the solution was evaluated using a static experimental method. The research findings revealed that, under the conditions of pH=3.5, an initial concentration of U(VI) of 25 mg·L⁻¹, reaction time of 40 min, and temperature of 25℃, the material exhibited a U(VI) removal rate of 96.26% with a corresponding removal capacity of 119.21 mg·g⁻¹. The reaction mechanism between C@CaTiO₃ and U(VI) was investigated using adsorption kinetics models, isothermal adsorption models, and thermodynamic models. The results demonstrate that the adsorption process of U(VI) by C@CaTiO₃ is a spontaneous endothermic reaction. The removal of U(VI) from the solution using C@CaTiO₃ involved both adsorption and reduction, with physical and chemical adsorption coexisting and surface monolayer chemical adsorption being the predominant mechanism. Photocatalytic reduction played a major role in the reduction process.
- carbon material,
- CaTiO₃,
- composites,
- uranium,
- removal,
- adsorption
Long Abstrsct
Innovation Points

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References(41)

References

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