维生素B_(12)改性的纳米零价镍对溶液中Se(Ⅳ)的去除  

Removal of Se(Ⅳ)in solution by VB_(12)@nZVNi

作　　者：王澜 付晓辉 张益硕 李琨 龚逸 李明哲 李小燕 WANG Lan;FU Xiaohui;ZHANG Yishuo;LI Kun;GONG Yi;LI Mingzhe;LI Xiaoyan(School of Nuclear Science and Engineering,East China University of Technology,Nanchang 330013,China;Nuclear Radiation Detection and Application Engineering Research Center,East China University of Technology,Nanchang 330013,China;Wuhan Sheyu Environmental and Health Testing and Evaluation Co.,Ltd.,Wuhan 430000,China)

机构地区：[1]东华理工大学,核科学与工程学院,南昌330013 [2]东华理工大学,核辐射探测及应用工程研究中心,南昌330013 [3]武汉舍鱼环境与健康检测评价有限公司,武汉430000

出　　处：《分析试验室》2024年第12期1662-1671,共10页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金(41761090);江西省教育厅资助项目(20171ACB20021);东华理工大学研究生创新基金(YC2022-s614,YC2020-S503)资助。

摘　　要：通过液相还原法合成了维生素B_(12)改性的纳米零价镍(VB_(12)@n ZVNi),考察了其对Se(Ⅳ)的去除性能。表征了VB_(12)@n ZVNi在去除Se(Ⅳ)前后的微观特征,并采用等温吸附、动力学和热力学模型对VB_(12)@n ZVNi去除Se(Ⅳ)的过程与机制进行了研究。结果表明,VB_(12)@n ZVNi对Se(Ⅳ)的去除过程包括吸附和还原2种方式,吸附过程符合准二级动力学和Langmuir等温吸附模型,且吸附是自发进行的。还原动力学研究结果显示,VB_(12)@n ZVNi对Se(Ⅳ)去除前期,其还原反应符合准一级动力学模型,还原机制为VB_(12)中的Co元素促进VB_(12)@n ZVNi对Se(Ⅳ)的还原作用。VB_(12)@n ZVNi合成材料在含Se(Ⅳ)废水处理中表现出优异的去除效果,具有良好的应用前景。Nano-zero-valent nickel(VB_(12)@nZVNi)modified with Vitamin B_(12) was prepared by liquid phase reduction method,and the removal performance of it to Se(Ⅳ)in solution was investigated.The microscopic features of VB_(12)@nZVNi before and after Se(Ⅳ)elimination were assessed.Se(Ⅳ)removal process and mechanism by VB_(12)@nZVNi were examined using isothermal adsorption,kinetic,and thermodynamic models.The results revealed that Se(Ⅳ)was removed by VB_(12)@nZVNi through adsorption and reduction ways.The adsorption is spontaneous,and conforms to pseudo-second-order kinetics and Langmuir isothermal model.Reduction kinetics demonstrated that the early removal reduction reaction matched to the quasi-first-order model.The Co element in vitamin B_(12) can stimulate nano-zero-valent nickel to reduce Se(Ⅳ).The VB_(12)@nZVNi material possesses favourable application prospects in Se(Ⅳ)-containing wastewater treatment due to the high removal efficiency.

关 键 词：纳米零价镍 维生素B_(12) 去除硒 性能 

分 类 号：O657.31[理学—分析化学] X832[理学—化学]