19 Development of High-Performance Polymeric Adsorbents by Radiation-Induced Graft Polymerization

Abstract

Insoluble inorganic compound, extractant, and enzyme were immobilized into the graft-chain phase formed onto a commercially available 6-nylon fiber by radiation-induced graft polymerization and subsequent chemical modifications. Insoluble cobalt ferrocyanide-impregnated fiber has removed radioactive caesium ions from water contaminated with radionuclides at TEPCO Fukushima Dai-ichi Nuclear Power Plant. Additionally, HDEHP-impregnated and urease-immobilized fibers were applicable to the recovery of rare-earth ions such as Nd and Dy in an acidic medium and the hydrolysis of urea in water, respectively.