[en] The radiolysis of two basic dyes (Astrazon red 6b and Astrazon blue BG 200%), was investigated as a function of dye concentration, ph, irradiation dose and dose rate. It was found that the Astrazon red 6B dye showed more radiation degradation than that of the Astrazon blue BG-200% dye. Combining irradiation with the conventional treatment resulted in an enhancement in the degree of degradation. Addition of oxygen or hydrogen peroxide showed this enhancement, while nitrogen showed no change. A ph drop was observed and may be attributed to the degradation of the dye molecules to lower molecular weight compounds such as organic acids. The primary radiolysis products as the secondary products are responsible for the degradation of the dye chromophore. Experiments on the adsorption or exchange the dyes onto GAC, some polymeric ion exchange resins and polymeric membranes were carried out showing that GAC having the highest adsorption capacity. Through the combined treatment of irradiation and adsorption, the total removal of these toxic dyes was achieved