Pb^(2+)离子印迹材料的制备及性能研究

Preparation and Properties of Pb^(2+)-imprinted Polymer

以Pb2+作为模板,环氧氯丙烷作为交联剂,MWNTs-CO/PEI作为功能单体,制备Pb2+-IIP材料。采用红外光谱和TEM对产物进行了表征。探讨了初始浓度、溶液pH值、吸附剂质量对吸附容量的影响。通过静态吸附实验研究Pb2+-IIP和Pb2+-NIP材料吸附实验的影响因素。结果表明,当吸附溶液的pH=5.0,吸附剂质量为0.03g,Pb2+的初始质量浓度为45mg/L时,Pb2+-IIP的最大吸附量为37.50mg/g,是Pb2+-NIP的2.47倍,40min内即可达到吸附平衡,吸附速率较快,选择识别性好,重复使用率高。

Using Pb2＋as a template,epichlorohydrin as a crosslinker and MWNTs-CO/PEI as a functional monomer,a Pb2＋-ion imprinted polymer（Pb^2＋-IIP）was prepared,and characterized subsequently by FTIR and TEM.The effects of initial concentration,solution pH value and mass of adsorbent on adsorption capacity were discussed.In addition,factors influencing the adsorption for Pb^2＋of Pb^2＋-IIP and Pb^2＋-NIP（Pb^2＋-non-imprinted polymer）were researched by static adsorption experiments.The results showed that when adsorption solution pH=5.0,adsorbent mass was 0.03 g and initial concentration of Pb2＋was 45mg/L,the as-prepared Pb2＋-IIP had a maximum adsorption capacity of 37.50mg/g,which was 2.47 times that of Pb^2＋-NIP,and a faster adsorption rate,at which the adsorption equilibrium can be achieved within 40 min,as well as the merits of good selective recognition and high reuse rate.