... in chemical sensing (Knight, 199 9), imaging (Wightman et al., 199 8), and optical studies (Fan et al., 199 8). Moreover, it is also used in chromatography (Noffsinger & Danielson, 198 7) and ... (February 199 9), pp. 99 9-1006, ISSN 1 097 -4628 Choi, S. H. & Nho, Y. C. ( 199 9b). Adsorption of Co2+ by Styrene-g-polyethylene Membrane Bearing Sulfonic Acid Group Modified by Radiation-Induced ... properties to obtain hydrophilic properties for versatile applications (Choi & Nho, 199 9a, 199 9b; Choi et al., 199 9, 2000a 2000b, 2001; S. K. Kim et al., 2010). RIGP can be easily modified...