Preparation of an Ion-Imprinted Fiber for the Selective Removal of Cu2+
详细信息 查看全文
- 作者：Tongyi Li ; Shuixia Chen ; Haichao Li ; Qihan Li ; Lei Wu
- 刊名：Langmuir
- 出版年：2011
- 出版时间：June 7, 2011
- 年：2011
- 卷：27
- 期：11
- 页码：6753-6758
- 全文大小：862K
- 年卷期：v.27,no.11(June 7, 2011)
- ISSN：1520-5827
文摘
A novel Cu2+-imprinted fiber (IIF) was prepared by grafting acrylic acid (AA) onto the surface of a polypropylene (PP) fiber and subsequently modified with polyethylenimine (PEI). An examination by infrared spectroscopy and scanning electron microscopy confirmed that the ion-imprinted polymer was successfully introduced onto the surface of a PP fiber. The modification of PP fibers with AA was beneficial to the grafting of PEI onto the fibers. The highest grafting degree of PEI could reach 120 wt % under optimal grafting conditions. This IIF showed excellent tensile and chemical stability in acid solution, which qualified the IIF for practical applications. Besides having a high adsorption capacity for Cu2+ (120 mg/g), the IIF adsorbent showed a high selectivity for Cu2+ as compared with that of the non-ion-imprinted fiber (NIF). The dynamic adsorption results indicated that IIF can thoroughly remove Cu2+ from the solution in a relatively short contact time. The effective treatment volume was about 910 bed volumes. The selectivity coefficient of IIF for Cu2+ with respect to Zn2+ could reach 76.4. IIF also has good regeneration performance and could maintain almost the same adsorption capacity for copper ions after 10 adsorption鈥揹esorption cycles.