中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Polyethylenimine-functionalized poly(vinyl alcohol) magnetic microspheres as a novel adsorbent for rapid removal of Cr(VI) from aqueous solution

文献类型:期刊论文

作者Sun, X. T.; Yang, L. R.; Li, Q.; Liu, Z. N.; Dong, T. T.; Liu, H. Z.
刊名Chemical Engineering Journal
出版日期2015
期号0页码:101-108
关键词PVA Polyethylenimine Superparamagnetic Cr(VI) Adsorption HIGH-CAPACITY ADSORPTION HEXAVALENT CHROMIUM WASTE-WATER METAL-IONS KINETICS BEADS POLYMERIZATION INDUSTRIAL COMPOSITE CELLULOSE
其他题名Chem. Eng. J.
中文摘要

A novel adsorbent, polyethylenimine-functionalized poly(vinyl alcohol) (PVA-PEI) magnetic microspheres, was prepared by a process involving: (1) synthesis of magnetic poly(vinyl acetate) microspheres (PVAc) using modified suspension polymerization, (2) preparation of PVA magnetic microspheres by methanolysis of PVAc and (3) two-step reaction with epichlorohydrin and polyethylenimine to yield amino groups. Magnetic measurement illustrated that the PVA-PEI microspheres were superparamagnetic, with a high saturated magnetization of 36.7 emu/g. Once generated, the PVA-PEI microspheres were used as adsorbent to remove Cr(VI) from an aqueous solution. The results demonstrated that the optimized pH value was observed at 2.0. The adsorption rate was extremely fast and the equilibrium was reached within 8 min. The adsorption isotherms of the adsorbent were preferably fitted to the Langmuir model, with the maximum adsorption capacity of 88.4 mg/g at 25 degrees C. Thermodynamic parameters indicated the spontaneous and exothermic nature of adsorption. In addition, the Cr(VI) ions were successfully eluted by a 0.1 mol/L NaOH solution, with the desorption efficiency of over 99%, and the adsorbent exhibited a good reusability. These results implied that the PVA-PEI microspheres should be considered as a potential adsorbent to remove Cr(VI) from wastewater. (C) 2014 Elsevier B.V. All rights reserved.

收录类别SCI
原文出处://WOS:000347577700013
语种英语
公开日期2015-04-01
源URL[http://ir.ipe.ac.cn/handle/122111/11826]  
专题过程工程研究所_研究所(批量导入)
推荐引用方式
GB/T 7714
Sun, X. T.,Yang, L. R.,Li, Q.,et al. Polyethylenimine-functionalized poly(vinyl alcohol) magnetic microspheres as a novel adsorbent for rapid removal of Cr(VI) from aqueous solution[J]. Chemical Engineering Journal,2015(0):101-108.
APA Sun, X. T.,Yang, L. R.,Li, Q.,Liu, Z. N.,Dong, T. T.,&Liu, H. Z..(2015).Polyethylenimine-functionalized poly(vinyl alcohol) magnetic microspheres as a novel adsorbent for rapid removal of Cr(VI) from aqueous solution.Chemical Engineering Journal(0),101-108.
MLA Sun, X. T.,et al."Polyethylenimine-functionalized poly(vinyl alcohol) magnetic microspheres as a novel adsorbent for rapid removal of Cr(VI) from aqueous solution".Chemical Engineering Journal .0(2015):101-108.

入库方式: OAI收割

来源:过程工程研究所

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。