Removal of arsenic in water by an ion-exchange fiber with amino groups

A new type of ion-exchange fiber with amino groups, called RPFA-I, was prepared. The amino modification and stretching resistance of RPFA-I were characterized by FTIR spectrum, SEM test, and auto-tensile test, respectively, and the removal of arsenite and arsenate in solution by RPFA-I was investiga...

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Bibliographic Details
Published in:Journal of applied polymer science 2008-12, Vol.110 (6), p.3934-3940
Main Authors: Zhang, Xiaozhuan, Jiang, Kai, Tian, Zhenbang, Huang, Weiqing, Zhao, Liang
Format: Article
Language:English
Subjects:
adsorption
Applied sciences
arsenate
arsenic removal
arsenite
Exact sciences and technology
Exchange resins and membranes
Fibers and threads
Fibrous ion exchange fiber
Forms of application and semi-finished materials
Polymer industry, paints, wood
Technology of polymers
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Summary:A new type of ion-exchange fiber with amino groups, called RPFA-I, was prepared. The amino modification and stretching resistance of RPFA-I were characterized by FTIR spectrum, SEM test, and auto-tensile test, respectively, and the removal of arsenite and arsenate in solution by RPFA-I was investigated. The obtained experimental results show that RPFA-I fibers have fine mechanical properties, and the amino functional groups have grafted to the surface of the matrix material. The adsorption results show that RPFA-I has a high capacity and good adsorption kinetic property in removal of arsenate and arsenite at the trace level. The removal efficiency was 70% for arsenite and 93% arsenate, respectively, at the concentration of 5 mg/L. The isothermal adsorptions were correspondent to Langmiur/Frundlich adsorption equation, and the adsorption kinetics was fit to the Lagergren pseudosecond order rate equation. The adsorption of the used adsorbent could be efficiently regenerated by 0.1M NaOH in a simple way.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.28955