Sulfonic acid (SO3H) groups were appended to three nonwoven fabrics made of polyethylene (PE), polypropylene (PP), and a hybrid of PP and PE by radiation-induced graft polymerization of glycidyl methacrylate (GMA) and subsequent ring-opening with sodium sulfite. Silver ion was loaded onto the resultant SO3H-type cation-exchange nonwoven fabric at a density of 2.0 mmol g(-1), where the molar ratio of Ag ions to SO3H groups was unity.