Synthetic dyes are used in diverse industries as coloring matter. These dyes being structurally complex are non degradable and hence effective degradation and decoloration of dye waste without causing any harm to the environment is desirable. The conventional technologies that are currently available are inefficient and fail to achieve this feat. Ionizing radiations like gamma radiation have been considered a promising tool for complete decoloration of dye effluents without leading to secondary

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... pollution. In the present study, the possibility of using gamma radiations to degrade and decolorize aqueous solutions of Malachite Green dye was investigated. Different systems of Malachite Green in aqueous solutions were irradiated using 60 Co as gamma radiation source at doses in the range 0.1 to 0.5 kGy at a dose rate of 0.386 kGy/hr. The corresponding change in absorbance, pH, conductance and the degree of decoloration were examined. The role of initial dye concentration, gamma radiation dose, effect of H2O2 on the rate and extent of decolorization was also explored.