维生素B12改性纳米零价镍去除溶液中U(Ⅵ)的机理

doi:10.11896/cldb.22040208

材料导报

2024, Vol. 38

Issue (4): 22040208-6 https://doi.org/10.11896/cldb.22040208

无机非金属及其复合材料

维生素B₁₂改性纳米零价镍去除溶液中U(Ⅵ)的机理

付晓辉¹, 李冠超², 王昱莹¹, 李小燕^1,*, 黄希¹, 刘小亮¹, 胡伟芳¹

1 东华理工大学核资源与环境国家重点实验室,南昌 330013
2 广东省核工业地质局辐射环境监测中心,广州 510800

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

FU Xiaohui¹, LI Guanchao², WANG Yuying¹, LI Xiaoyan^1,*, HUANG Xi¹, LIU Xiaoliang¹, HU Weifang¹

1 State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China
2 Radiation Environment Monitoring Center of Guangdong Geological Bureau of Nuclear Industry, Guangzhou 510800, China

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摘要采用液相还原法制备了维生素B₁₂改性的纳米零价镍(VB₁₂@nZVNi),运用SEM-EDS、Zeta、XPS对材料进行表征,研究其形貌特征,并对VB₁₂@nZVNi去除U(Ⅵ)的机理进行等温吸附、动力学与热力学研究。动力学研究结果表明,VB₁₂@nZVNi对U(Ⅵ)的去除包括吸附和还原两种方式,其吸附过程很好地符合准二级吸附动力学模型和Langmuir等温吸附模型,理论最大吸附容量高达670.6 mg/g。热力学研究结果表明,该反应是自发进行的吸热反应,吸附过程是物理吸附与化学吸附并存,为表面单层吸附且离子间没有相互作用。还原反应符合准一级还原动力学模型,维生素B₁₂中的Co可促进Ni⁰对U(Ⅵ)的还原。VB₁₂@nZVNi材料的合成方法简便、环境友好、去除效果好,在含U(Ⅵ)废水处理中具有较好的应用前景。

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关键词: 纳米零价镍维生素B₁₂ 铀机理

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

出版日期: 2024-02-25 发布日期: 2024-03-01

ZTFLH:

X591

基金资助: 国家自然科学基金(11465002;41760190)

通讯作者: *李小燕,东华理工大学核科学与工程学院教授,博士研究生导师。2001年毕业于华东地质学院环境工程专业,获学士学位;2007年毕业于东华理工大学环境工程专业,获硕士学位;2013年毕业于中国原子能科学研究院辐射防护及环境保护专业,获博士学位。研究方向为功能材料合成及放射性核素分离和光催化,先后主持国家自然科学基金项目3项,江西省自然科学基金重点项目1项,江西省教改重点项目1项,参与国家级科研项目5项,发表学术论文50余篇,出版学术专著1部。372040739@qq.com

作者简介: 付晓辉,2020年6月于三峡大学获得工学学士学位。现为东华理工大学核科学与工程学院硕士研究生,在李小燕教授的指导下进行研究。目前主要研究领域为辐射防护及环境保护。

引用本文:

付晓辉, 李冠超, 王昱莹, 李小燕, 黄希, 刘小亮, 胡伟芳. 维生素B₁₂改性纳米零价镍去除溶液中U(Ⅵ)的机理[J]. 材料导报, 2024, 38(4): 22040208-6.
FU Xiaohui, LI Guanchao, WANG Yuying, LI Xiaoyan, HUANG Xi, LIU Xiaoliang, HU Weifang. Removal Mechanism of U(Ⅵ) from Solution by VB₁₂ Modified Nano Zero-valent Nickel. Materials Reports, 2024, 38(4): 22040208-6.

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http://www.mater-rep.com/CN/10.11896/cldb.22040208 或 http://www.mater-rep.com/CN/Y2024/V38/I4/22040208

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