摘要
以碳纳米管(CNTs)作为电子传递载体、溴氧铋(BiOBr)作为溴离子(Br^(-))传输通道、季铵化壳聚糖(QCS)作为成膜剂,通过真空抽滤法制备了碳基溴离子选择渗透膜(CNTs/QCS/BiOBr),并将其应用于电控离子选择渗透膜分离(ESIP)系统中分离回收Br^(-),探讨了ESIP体系中的操作参数对Br^(-)渗透通量的影响,研究了CNTs/QCS/BiOBr膜在ESIP系统中的稳定性及其对Br^(-)的选择性分离效果.结果表明,当ESIP系统的槽电压和脉冲电压分别为3.5 V和0/-2.5 V时,CNTs/QCS/BiOBr膜对Br^(-)的渗透通量达到了3.00 g/(m^(2)·h).此外,CNTs/QCS/BiOBr复合膜在ESIP系统中不仅具有循环稳定性,还能实现Br^(-)的选择性分离.
The carbon-based Br^(-)permselective membrane(CNTs/QCS/BiOBr)was constructed by vacuum filtration using carbon nanotubes(CNTs)as the transfer carrier for electrons,bismuth oxybromide(BiOBr)as the transport channels for Br^(-)and quaternized chitosan(QCS)as the membrane forming agent.Subsequently,the CNTs/QCS/BiOBr membrane was assembled in the electrochemically switched ion permselective(ESIP)system for the separation of Br^(-)and the influence of different operating parameters on the separation effect of Br^(-)was investigated.The stability of CNTs/QCS/BiOBr membrane in the ESIP system and their selective separation effect on Br^(-)were researched.The results indicate that the flux of CNTs/QCS/BiOBr composite membrane for Br^(-)reaches 3.00 g/(m^(2)·h)when the cell and pulse voltages in the ESIP system are 3.5 V and 0/-2.5 V,respectively.In addition,the CNTs/QCS/BiOBr composite membrane possesses cycling stability and selectivity for Br^(-).
作者
王洁
张良
罗善霞
杜晓
郝晓刚
WANG Jie;ZHANG Liang;LUO Shanxia;DU Xiao;HAO Xiaogang(College of Chemical Engineering and Technology,Taiyuan University of Technology,Taiyuan 030024,China;Regional Geological Survey Institute of Hebei Province,Langfang 065000,China;Langfang Natural Resources Comprehensive Survey Center,China Geological Survey,Langfang 065000,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2024年第2期64-71,共8页
Membrane Science and Technology
基金
国家自然科学基金项目(U21A20303,22078217)
河北省地质矿产勘查开发局科研项目(13000022P00329410110T)。
关键词
溴离子
电控离子选择渗透
分离回收
碳纳米管
碳基膜
bromine ion
electrochemically switched ion permselective
separation and recovery
carbon nanotubes
carbon-based membrane
