Adsorption of Co2+ and Cs1+ by polyethylene membrane with iminodiacetic acid and sulfonic acid modified by radiation-induced graft copolymerization

✍ Scribed by Seong-Ho Choi; Young Chang Nho

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 193 KB
• Volume: 71
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19990207)71:6<999::aid-app15>3.0.co;2-c

✦ Synopsis

Two modified hollow fiber membranes, the chelating hollow fiber membrane with iminodiacetic acid and the cation-exchange hollow fiber membrane with sulfonic acid group (OSO 3 H), were prepared by radiation-induced grafting of glycidyl methacrylate onto polyethylene hollow fiber membrane and its subsequent iminodiacetation and sulfonation. The adsorption characteristics of Co 2ϩ and Cs 1ϩ for the 2 hollow fiber membranes were examined when the solutions of Co 2ϩ and Cs 1ϩ permeate across the 2 membranes, respectively. Without regard to the chelating membrane with iminodiacetic acid group and the cation-exchange membrane with sulfonic acid group (OSO 3 H), 2 membranes were observed to adsorb Co 2ϩ higher than Cs 1ϩ . The adsorption curves of Co 2ϩ by IDA group-chelating fiber membrane in the presence of Na 1ϩ and Ca 2ϩ showed that the chelating hollow was found to have a very high selectivity for Co 2ϩ , even though there is a high concentration of Na 1ϩ and Ca 2ϩ in the inlet solution.