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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。
Pb (NO_3) _2 was used as a template ion and 8, 8-hydroxyquinoline was used as a complexing agent. Styrene, EGDMA and AIBN were used as functional monomers, crosslinkers and initiators respectively. +) Imprinted polymer for rapid adsorption and selective separation of trace Pb from aqueous solutions. Fourier transform infrared spectroscopy and scanning electron microscopy to characterize the surface morphology and structure of Pb-IIPs and NIPs. The effects of Pb2 + initial concentration, solution pH and adsorption time on the adsorption properties of polymers were investigated by FAAS. The results showed that the optimum adsorption conditions of Pb 2+ were as follows: the maximum adsorption capacity of Pb 2+ was 2.86 mg / g when the initial concentration of Pb 2+ was 10 mg / L, pH was 5 ~ 6 and the adsorption time was about 4 h, Is 3.95 times that of the non-imprinted polymer; the repeated use of imprinted polymer is more than 5 times, and the selection of trace Pb repeats is better.