期刊
CHINESE JOURNAL OF CHEMISTRY
卷 29, 期 3, 页码 387-398出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cjoc.201190093
关键词
surface ion imprinted; Co(II); polyethyleneimine (PEI); SBA-15; adsorption; selective
资金
- National Natural Science Foundation of China [21077046]
- Ph. D. Programs Foundation of Ministry of Education of China [20093227110015]
- Ph.D. Innovation Programs Foundation of Jiangsu University [CX09B 12XZ]
A novel surface ion imprinted adsorbent [Co(II)-IIP] using polyethyleneimine (PEI) as function monomer and ordered mesoporous silica SBA-15 as support matrix was prepared for Co(II) analysis with high selectivity. The prepared polymer was characterized by Fourier transmission infrared spectrometry, scanning electron microscopy, X-ray diffraction and nitrogen adsorption-desorption isotherm. Bath experiments of Co(II) adsorption onto Co(II)-HP were performed under the optimum conditions. The experimental data were analyzed by pseudo-first-order and pseudo-second-order kinetic models. It was found that the pseudo-second-order model best correlated the kinetic data. The intraparticle diffusion and liquid film diffusion were applied to discuss the adsorption mechanism. The results showed that Co(II) adsorption onto LIP was controlled by the intraparticle diffusion mechanism, along with a considerable film diffusion contribution. Langmuir, Freundlich and Dubinin-Radushkevich adsorption models were applied to determine the isotherm parameters. Langmuir model fitted the experiment data well and the maximum calculated capacity of Co(II) reached 39.26 mg/g under room temperature. The thermodynamic data Were indicative of the spontaneousness of the endothermic sorption process of Co(II) onto Co(II)-IIP. Co(II)-LIP showed high affinity and selectivity for template ion compared with non imprinted polymer (NIP).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据