Removal Mechanism of U(VI)from Solution by VB12 Modified Nano Zero-valent Nickel

被引：0

作者：

Fu X. ^{[1
]}

Li G. ^{[2
]}

Wang Y. ^{[1
]}

Li X. ^{[1
]}

Huang X. ^{[1
]}

Liu X. ^{[1
]}

Hu W. ^{[1
]}

机构：

[1] State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang

[2] Radiation Environment Monitoring Center of Guangdong Geological Bureau of Nuclear Industry, Guangzhou

来源：

Cailiao Daobao/Materials Reports | 2024年 / 38卷 / 04期

基金：

中国国家自然科学基金;

关键词：

mechanism; nano-zero-valent nickel; U(VI); vitamin B[!sub]12[!/sub;

D O I：

10.11896/cldb.22040208

中图分类号：

学科分类号：

摘要：

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. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.

引用

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