Preparation of Adsorptive Fiber by a Combination of Peroxo Complex of Titanium Anion and DMAPAA-Grafted Fiber for the Removal of Strontium from Seawater

• Published in: Bulletin of the Society of Sea Water Science, Japan Vol. 69; no. 2; pp. 90 - 97
• Main Authors: KONO, Michitaka, UMINO, Satoshi, GOTO, Shun-ichi, FUJIWARA, Kunio, SUGO, Takanobu, KOJIMA, Takashi, KAWAI-NOMA, Shigeko, UMENO, Daisuke, SAITO, Kyoichi
• Format: Journal Article
• Language: Japanese
• Published: The Society of Sea Water Science, Japan 2015
• Subjects: Binding capacity; Peroxo complex of titanium anions; Seawater; Sodium-titanate-impregnated fiber; Strontium
• ISSN: 0369-4550; 2185-9213
• DOI: 10.11457/swsj.69.90

In order to remove strontium from seawater, sodium titanate was impregnated onto a commercially available 6-nylon fiber by means of radiation-induced graft polymerization and subsequent chemical modifications. First, dimethyaminopropyl acrylamide as an originally anion-exchange-group-containing vinyl monomer was graft-polymerized onto the electron-beam-irradiated nylon fiber, followed by binding of a peroxo complex of titanium anions to the anion-exchange group of the graft chain. Then, bound titanium species were converted into insoluble sodium titanate through a reaction with sodium hydroxide. The equilibrium binding capacity of the sodium-titanate-impregnated fiber for strontium in seawater was calculated as 1.7 mg/g-Sr of the fiber from Langmuir adsorption isotherm.