|An absorbent was prepared by radiation grafting of cationic monomer on fiber to reduce the color. The color was easily removed using the absorbent. The decrease in chromaticity using absorbents depended on the degree of grafting of the absorbents. Maximum decrease in 4h was obtained when absorbent with 86% degree of grafting was used. The absorbed colored substances on the absorbent were easily desorbed using salt solution. The colored substances in the secondary treated water were estimated to be humic substances. The absorbent and desorbent after removing colored substances could be used repeatedly.