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High-efficiency removal of U(VI) from low-concentration uranium-bearing wastewater using ZnCl2-modified activated carbon loading nZVI

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Abstract

ZnCl2-modified activated carbon supported nanoscale zero-valent iron material (nZVI/BC600) was synthesized by green carbothermal reduction and liquid phase reduction to explore the removal efficiency of U(VI) under different conditions. The results showed that under the optimal conditions (C0 = 10 mg/L, C/Fe = 5:1, pH = 5.5, t = 30 min), the removal rate of U(VI) by nZVI/BC600 was 99.68%, which was 9.18% higher than that of ZnCl2-modified activated carbon and conformed to the pseudo-second-order kinetic model. SEM and XPS analysis showed that nZVI was uniformly distributed on activated carbon, and U(VI) was reduced to U(IV) or U(V). The removal mechanism of U(VI) by nZVI/BC600 is chemical adsorption, redox and co-precipitation.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (11705082 and 51874180) and Natural Science Foundation of Hunan Province (2023JJ30513) as well as Research Project of Education Department of Hunan Province (22A0303).

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Authors and Affiliations

  1. School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, People’s Republic of China

    Qi Fang, Jing Wang, Qian Liu, Yanling Tan, Zhenyu Chen, Junwen Lv & De Zhang

  2. School of Computer Science, University of South China, Hengyang, 421001, People’s Republic of China

    Guojian Peng

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  1. Qi Fang
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  7. De Zhang
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Correspondence to Qi Fang.

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Fang, Q., Wang, J., Liu, Q. et al. High-efficiency removal of U(VI) from low-concentration uranium-bearing wastewater using ZnCl2-modified activated carbon loading nZVI. J Radioanal Nucl Chem 332, 3977–3990 (2023). https://doi.org/10.1007/s10967-023-09091-0

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