Addressing an environmental issue related to the hazardous industrial effluent containing nitrocresols. Working in efforts aimed at the reduction the nitro-cresol level to acceptable amounts by resin adsorption. Studying the resin regeneration capacity and compared the performance of different resins and solvents used for regeneration. Studying the characteristics of the DOST catalyst for colour removal and wrote a SOP for DOST catalyst. Preparing a plant scale proposal for treatment and did the economic analysis of the plant scale project.