印迹改性磁性交联壳聚糖的表征及吸附性能

程爱华; 冯利凡; 刘艳妮; 畅飞

印迹改性磁性交联壳聚糖的表征及吸附性能

西安科技大学地质与环境学院, 西安 710054

基金项目: 国家自然科学基金（51278418）；陕西省教育厅专项科研计划项目（2013JK0893）

详细信息

通讯作者:
程爱华，博士，副教授，研究方向为水处理技术。E-mail：cah_cheng@126.com

中图分类号: TB332
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出版历程
- 收稿日期: 2013-07-04
- 刊出日期: 2014-08-14

Characterization and adsorption performance of imprinting modified magnetic crosslinking chitosan

School of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China

摘要

摘要: 为了提高壳聚糖（CS）对Pb²⁺的去除能力，制备了印迹改性磁性交联壳聚糖（Pb-TMCS），采用FTIR、SEM和XRD对其结构和形态进行了表征，研究了Pb-TMCS对Pb²⁺的吸附、脱附性能及选择性。结果表明：与CS相比，Pb-TMCS的表面孔隙和褶皱增多；Pb-TMCS引入了更多的-OH和-NH₂；Pb-TMCS内部包覆磁性物质Fe₃O₄，Pb-TMCS对 CS的相对选择性系数大于2；Pb-TMCS对Pb²⁺的吸附量从CS的25.57 mg/g提高到45.26 mg/g，脱附3次后仍可重复使用。Pb-TMCS回收方便，对Pb²⁺选择吸附性能好，无污染，在重金属废水处理中具有广阔的应用前景。
- 壳聚糖 /
- 改性 /
- 印迹 /
- 磁性 /
- 吸附 /
- 铅离子
Abstract: The imprinting modified magnetic crosslinking chitosan(Pb-TMCS)was prepared to improve the removal ability of chitosan (CS) to Pb²⁺, whose structure and morphology were characterized by FTIR, SEM and XRD, and the adsorption, desorption performance and selectivity of Pb²⁺ on Pb-TMCS were studied. Results show that compared with CS, Pb-TMCS has more pore and fold, and more -OH and-NH₂ are introduced. The magnetic material Fe₃O₄ is embed in Pb-TMCS. The relative selectivity coefficient of Pb-TMCS to CS is more than 2. Pb-TMCS shows higher adsorption capacity (45.26 mg/g) than CS (25.57 mg/g) for Pb²⁺. Pb-TMCS could be used repeatedly after being desorpted 3 times. Recycling of Pb-TMCS is convenient, and it has high selective adsorption for Pb²⁺, and it is non-polluting, so it has good application prospect in treatment of heavy metal waste water.
- chitosan /
- modification /
- imprinting /
- magnetic /
- adsorption /
- lead ions