Preparation of Rayon-Based Chelating Fiber for Boron Removal by Radiation-Induced Graft Polymerization

Abstract

For the removal of boron in liquid, N-methylglucamine （NMG） as a chelating moiety was immobilized to the poly-glycidyl methacrylate chain grafted onto a rayon fiber irradiated by means of electron beam. The density of the NMG immobilized was 1.9 mmol/g of the product. The resultant fiber was compared to a 6-nylon-based chelating fiber with an NMG density of 1.9 mmol/g that was derived from an electron-beam-irradiated 6-nylon fiber. The equilibrium binding capacity agreed with both fibers at 15 mg-B/g. The dynamic binding capacities of the rayon -and 6-nylon-based chelating fibers for boron were 9.4 and 4.5 mg-B/g, respectively, determined from respective breakthrough curves at a space velocity of 40 h^－1 of 150 mg-B/L solution flowing through a 10 mm-high fiber-packed bed.