多离子印迹膜的制备及其吸附性能研究
Preparation and adsorption properties of multi-ion imprinted membranes
祁迎春 1王建 1董利林 1陈妍妍 1钟先保 1刘勇1
作者信息
- 1. 延安大学 石油工程与环境工程学院,延安市环境检测与修复重点实验室,陕西 延安 716000
- 折叠
摘要
以Zn2+、Co2+、Cr3+和Pb2+为混合模板,双硫腙为螯合剂,APTES为功能单体,TEOS为交联剂,PVDF为基膜,采用凝胶溶胶法成功合成了对模板离子有高吸附量和良好特异性识别能力的多离子印迹膜(MIIM).采用SEM对材料的形貌进行了表征,并以多离子印迹聚合物(MIIP)为对比评价了MIIM的吸附性能.结果表明,MIIM对Zn2+、Co2+、Cr3+和Pb2+的吸附量分别是MIIP的1.71、1.43、1.60和9.03倍,最大吸附量分别为21.32、11.21、12.72和25.97 mg·g-1.在竞争离子(Cu2+、Ni2+、Fe2+)存在的情况下具有良好的吸附选择性,MIIM的4种模板离子对Ni2+和Fe2+的特异性因子(SP)值在4.86～8.34之间,对Cu2+的SP值在3.58～3.92之间.同时,MIIM可以多次再生,而不会明显降低吸附能力,在废水处理和样品前处理领域具有很好的应用前景.
Abstract
Using Zn2+,Co2+,Cr3+and Pb2+as mixed templates,dithizone as chelating agent,APTES as functional monomer,TEOS as crosslinking agent,and PVDF as base membrane,multi-ion imprinted membranes(MIIM)with high adsorption capacity and good specific recognition ability for template ions were successfully synthesized by gel sol method.The morphology of MIIM was characterized by SEM,and the adsorption properties of MIIM were compared with that of multi-ion imprinted polymer(MIIP).The results showed that the adsorption capacity of MIIM for Zn2+,Co2+,Cr3+and Pb2+was 1.71,1.43,1.60 and 9.03 times that of MIIP respectively,and the maximum adsorption capacity was 21.32,11.21,12.72 and 25.97 mg·g-1 respectively.The four template ions of MIIM had good adsorption selectivity in the presence of competing ions(Cu2+、Ni2+、Fe2+).The specific factor(SP)values for Ni2+and Fe2+of MIIM were between 4.86 and 8.34,and the SP values for Cu2+were between 3.58 and 3.92.At the same time,MIIM can be regenerated several times without significantly reducing the adsorption capac-ity,which has a good application prospect in the field of wastewater treatment and sample pretreatment.
关键词
多离子印迹膜/重金属/吸附性能/选择性分离Key words
multi-ion imprinted membrane/heavy metals/adsorption property/selective separation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据