ZIF-8-SiO<sub>2</sub> and adsorption on U(VI)

FAN Yuanrui; ZHANG Wei; CHEN Yuantao; QIN Jianxian

doi:10.13801/j.cnki.fhclxb.20201207.001

Volume 38 Issue 9

Sep. 2021

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FAN Yuanrui, ZHANG Wei, CHEN Yuantao, et al. ZIF-8-SiO2 and adsorption on U(VI)[J]. Acta Materiae Compositae Sinica, 2021, 38(9): 3064-3072. doi: 10.13801/j.cnki.fhclxb.20201207.001

Citation:

FAN Yuanrui, ZHANG Wei, CHEN Yuantao, et al. ZIF-8-SiO₂ and adsorption on U(VI)[J]. Acta Materiae Compositae Sinica, 2021, 38(9): 3064-3072. doi: 10.13801/j.cnki.fhclxb.20201207.001

FAN Yuanrui, ZHANG Wei, CHEN Yuantao, et al. ZIF-8-SiO2 and adsorption on U(VI)[J]. Acta Materiae Compositae Sinica, 2021, 38(9): 3064-3072. doi: 10.13801/j.cnki.fhclxb.20201207.001

Citation:

FAN Yuanrui, ZHANG Wei, CHEN Yuantao, et al. ZIF-8-SiO₂ and adsorption on U(VI)[J]. Acta Materiae Compositae Sinica, 2021, 38(9): 3064-3072. doi: 10.13801/j.cnki.fhclxb.20201207.001

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ZIF-8-SiO₂ and adsorption on U(VI)

doi: 10.13801/j.cnki.fhclxb.20201207.001

College of Chemistry and Chemical Engineering, Qinghai Normal University, Xining 810008, China

Received Date: 2020-09-17
Accepted Date: 2020-11-30

Available Online: 2020-12-08

Publish Date: 2021-09-01

Abstract

Abstract

Zeolite imidazole ester framework structure material ZIF-8 and TEOS were used to prepare ZIF-8-SiO₂ composite, the structure of ZIF-8-SiO₂ and the morphology before and after adsorption of U(VI) were characterized by XRD, SEM, EDS. And the results show that ZIF-8-SiO₂ is successfully prepared and has a good adsorption effect on U(VI). The effects of pH value, time, temperature, initial uranium concentration and salt concentration on the adsorption performance of ZIF-8-SiO₂ were investigated by static adsorption experiments. According to the experimental results, when the initial concentration is 80 mg·g⁻¹, the maximum actual adsorption capacity of ZIF-8-SiO₂ on U(VI) at 25℃ is 498 mg·g⁻¹, and according to the analysis of Langmuir model fitting results, the theoretical adsorption capacity of the material on U(VI) is up to 678.5 mg·g⁻¹. And in the range of 200~500 MPa, the higher the pressure, the better the adsorption. FTIR and XPS were used to characterize the structure of the material before and after uranylion adsorption, to explore the possible adsorption mechanism during the adsorption process.
- ZIF-8-SiO₂,
- composite materials,
- uranium processing,
- adsorption method,
- high pressure simulation
Long Abstrsct
Innovation Points

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References(28)

References

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