维生素B<sub>12</sub>改性纳米零价镍去除溶液中U(Ⅵ)的机理

doi:10.11896/cldb.22040208

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Abstract Vitamin B₁₂-modified nano zero-valent nickel (VB₁₂@nZVNi) was prepared by liquid phase reduction method. The morphology of VB₁₂@nZVNi was characterized by SEM-EDS, Zeta, and XPS. The removal mechanism of U(Ⅵ) by VB₁₂@nZVNi was studied with isotherm adsorption, kinetic fitting and thermodynamics. The kinetic study results showed that the removal of U(Ⅵ) by VB₁₂@nZVNi included adsorption and reduction, the adsorption process was in good agreement with the pseudo-second-order adsorption kinetic model and the Langmuir isotherm adsorption model, and the theoretical maximum adsorption capacity reached 670.6 mg/g. The results of thermodynamic study showed that the reaction was a spontaneous endothermic reaction, and the adsorption process was a coexistence of physical adsorption and chemical adsorption, which was a single-layer adsorption on the surface and there was no interaction between ions. The reduction reaction conformed to the pseudo-first-order reduction kinetics model and Co in vitamin B₁₂ could promote the reduction of U(Ⅵ) by Ni⁰. VB₁₂@nZVNi has good application prospects in the treatment of U(Ⅵ)-containing wastewater due to its facile synthesis, environmental friendliness and good removal effect.

Key words： nano-zero-valent nickel vitamin B₁₂ U(Ⅵ) mechanism

Published: 25 February 2024 Online: 2024-03-01

CLC number:

X591

Fund:National Natural Science Foundation of China(11465002,41760190).

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	Articles by authors
	FU Xiaohui
	LI Guanchao
	WANG Yuying
	LI Xiaoyan
	HUANG Xi
	LIU Xiaoliang
	HU Weifang

Cite this article:

FU Xiaohui,LI Guanchao,WANG Yuying, et al. Removal Mechanism of U(Ⅵ) from Solution by VB₁₂ Modified Nano Zero-valent Nickel[J]. Materials Reports, 2024, 38(4): 22040208-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22040208 OR http://www.mater-rep.com/EN/Y2024/V38/I4/22040208

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