Abstract
To enhance the removal rate of ruthenium from water, nucleic-acid base-immobilized fibers as adsorbent were prepared by means of radiation-induced graft polymerization of glycidyl methacrylate and the subsequent addition of nucleic-acid bases. The density of adenine immobilized onto 6-nylon fiber was 1.2 mmol/g. Ther removal rate of ruthenium increased with an increase in sodium chloride concentration in the ruthenium solution. The removal rate was represented by second-order reaction with respect to ruthenium concentration. The dependence of the initial removal rate of ruthenium from the solution on the temperature demonstrated that the activation energy of overall adsorption of ruthenium onto adenine-immobilized fiber was 45 kJ/mol, irrespective of the sodium chloride concentration ranging from 0.025 to 0.5 M.
