摘要
以8-羟基喹啉作为络合剂,Pb(NO_3)_2为模板离子,苯乙烯、EGDMA和AIBN分别为功能单体、交联剂和引发剂,本体聚合技术制备微孔结构Pb^(2+)印迹聚合物,用于从水溶液中快速吸附和选择分离痕量Pb。傅里叶变换红外光谱法和扫描电镜表征Pb-IIPs和NIPs的表面形貌和结构。以FAAS法研究了Pb^(2+)初始质量浓度、溶液pH及吸附时间等因素对聚合物吸附性能的影响。结果表明,Pb^(2+)的最佳吸附条件为:Pb^(2+)初始质量浓度为10mg/L,pH5~6,吸附时间约为4h时,最大吸附容量达到2.86mg/g,是非印迹聚合物吸附容量的3.95倍;印迹聚合物重复使用5次以上,选择分离痕量Pb重复效果较好。
A novel micro-pore structured ion imprinted polymer（ Pb-IIPs） was synthesized by bulk polymerization technique with Pb（ NO3）2as template ion,8-hydrixyquinoline（ oxine） as complex reagent,and styrene,ethylene glycol dime-thacrylate（ EGDMA） or AIBN as a monomer,cross-linker and initiator for the fast and selective adsorption of trace Pb（ II） ion in aqueous solution. The surface morphology and structure of Pb-IIPs and NIPs was characterized by FTIR and SEM. The influence from the concentration of Pb^2＋ ,p H value and the adsorption time on the adsorption capacity of polymers were investigated by FASS. The results showed that the optimal experimental conditions of adsorption was as follows： the concentration of Pb^2＋ was 10 mg / L,p H value was set as 5 - 6,and the adsorption time was 4 h. Under the above conditions,the Pb-IIPs showed good adsorption and selectivity,and the maximal adsorption capacity of imprinted polymer was about 2. 86 mg / g,3. 95 times higher than that of non-imprinted polymer. The adsorption capacity of the imprinted polymer exhibited good reproducibility even after recycle for more than five times.
出处
《分析试验室》
CAS
CSCD
北大核心
2016年第8期903-906,共4页
Chinese Journal of Analysis Laboratory
基金
国家自然科学基金项目(51403179)资助
