摘要
文章制备了一种能够选择性吸附Cd2+的磁性印迹壳聚糖球粒。该壳聚糖球粒是以Cd2+为模板,通过分子印迹技术将磁性的Fe3O4纳米粒子包裹入壳聚糖球粒内,使壳聚糖球粒具有磁性。结果表明:磁性印迹壳聚糖球粒对Cd2+具有很高的选择性吸附能力,其对Cd2+的吸附能力为Cu2+的2倍,是Zn2+的3倍;该壳聚糖球粒能够在外界磁场作用下方便快捷地与水体发生分离,从而实现对水体中重金属离子的移除与富集;该壳聚糖球粒可以重复使用,在循环5次后仍保持了超过90%的吸附能力。该制作磁性印迹壳聚糖球粒的技术不仅能够应用于Cd2+的吸附与分离过程,也能应用于其他重金属离子的吸附与分离过程。
In this paper, a kind of magnetic and molecular imprinting chitosan spheres was prepared which were able to selectively absorb Cd2＋ ions. Cd2＋ ions were used as templates to fabricate the mo- lecular imprinting chitosan spheres, magnetic Fe304 nanoparticles were embedded into the chitosan spheres to endow the spheres magnetism. The results showed that, firstly, the absorption ability of such chitosan spheres to Cd2＋ was high, which was two times that of Cu2＋ , and was about three times that of Zn2＋ secondly, such chitosan spheres were able to be separated from the aqueous solutions conveniently and very quickly under the external magnetic field, and thus to remove and concentrate the heavy metal ions~ thirdly, such chitosan spheres could be used repeatedly, more than 90% adsorp- tion capacity remaining after five times recycling. The process proposed in this paper is not only suit- able for the adsorption and separation of Cd2＋ , but also applicable in the adsorption and separation ofthe other heavy metal ions.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第6期837-841,共5页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目(21204016)
合肥工业大学国家级大学生创新训练计划资助项目(201210359036)
关键词
壳聚糖球粒
重金属离子
吸附
磁性
分子印迹
chitosan sphere
heavy metal ion
absorption
magnetism
molecular imprinting
作者简介
王小骥（1989-），男，江苏南京人，合肥工业大学硕士生；
郝文涛（1973-），男，河南平顶山人，博士，合肥工业大学副教授，硕士生导师
