首页  |  本刊简介  |  编委会  |  投稿须知  |  订阅与联系  |  微信  |  出版道德声明  |  Ei收录本刊数据  |  封面
核-壳表面磁性印迹聚合物的制备及其对水中双酚A的特异性去除
摘要点击 2370  全文点击 1060  投稿时间:2012-07-22  修订日期:2012-12-15
查看HTML全文 查看全文  查看/发表评论  下载PDF阅读器
中文关键词  双酚A  分子印迹  核-壳结构  吸附选择性  二级出水
英文关键词  bisphenol A  molecularly imprinting  core-shell structure  adsorption selectivity  MWTP effluents
作者单位E-mail
刘建明 天津市水质科学与技术重点实验室, 天津 300384
天津城市建设学院环境与市政工程系,天津 300384 
jimjmliu@hotmail.com 
李红红 天津市水质科学与技术重点实验室, 天津 300384
天津城市建设学院环境与市政工程系,天津 300384 
 
熊振湖 天津市水质科学与技术重点实验室, 天津 300384
天津城市建设学院环境与市政工程系,天津 300384 
zhenhu.xiong@126.com 
中文摘要
      采用表面印迹技术制备了核-壳结构的磁性分子印迹聚合物(Fe3 O4 @ SiO2-MIPs),在外磁场作用下该吸附剂很容易实现固-液分离. 采用X-射线衍射(XRD)、扫描电镜(SEM)和傅里叶变换红外光谱(FT-IR)对产物的结构进行了表征. 通过平衡吸附实验与斯卡查德(Scatchard)分析证实了Fe3O4@SiO2-MIPs对双酚A的吸附选择性. Freundlich模型拟合吸附等温线的相关系数R2=0.9952; 准二级动力学模型很好地拟合了吸附动力学,相关系数R2达到了0.9999. 在弱酸性条件下,制备的印迹材料表现出高吸附效率和快速的吸附动力学,达到90%的去除率仅需40 min; 各种离子的存在不影响双酚A的吸附率; 与非印迹聚合物(Fe3 O4 @ SiO2-NIPs)比较,Fe3 O4 @ SiO2-MIPs对湖水中加标的双酚A表现出显著的亲和性; 7次的重复使用而性能没有明显下降证明了Fe3 O4 @ SiO2-MIPs的可重复使用性.
英文摘要
      This paper reports the preparation of surface-imprinted polymer core-shell magnetic material as adsorbent for separating bisphenol A in the environmental water. The adsorbent prepared easily achieved the magnetic separation under an external magnetic field. The structures of the resulting composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR) analysis. The adsorption selectivity of Fe3 O4 @ SiO2-MIPs for bisphenol A was demonstrated by equilibrium rebinding experiments and Scatchard analysis. Freundlich adsorption model can well describe the adsorption isothermals of bisphenol A with the correlation coefficients R2=0.9952. The dynamics of bisphenol A adsorbed by Fe3 O4 @ SiO2-MIPs can be well described by the pseudo second-order model (R2=0.9999). In the solutions with weak acidity, the Fe3 O4 @ SiO2-MIPs showed higher removal rate and rapid adsorption dynamical process, requiring only 40 min to reach a removal rate of 90%; the presence of ions did not affect the adsorption rate of bisphenol A; when compared with the non-imprinted polymer (Fe3 O4 @ SiO2-NIPs),the Fe3 O4 @ SiO2-MIPs showed outstanding affinity toward bisphenol A; the performance of the resulting composites (Fe3 O4 @ SiO2-MIPs) without obvious deterioration was demonstrated in seven repeated cycles.

您是第51728312位访客
主办单位:中国科学院生态环境研究中心 单位地址:北京市海淀区双清路18号
电话:010-62941102 邮编:100085 E-mail: hjkx@rcees.ac.cn
本系统由北京勤云科技发展有限公司设计  京ICP备05002858号-2