Add time:08/11/2019         Source:sciencedirect.com

The photochemical decolourisation of chlorotriazine reactive azo dye Reactive Orange 4 (cas 12225-82-0) (RO4) has been carried out by Fenton and photo-Fenton processes. The effects of solution pH, applied H2O2, Fe2+ dose, UV light intensity have been studied. The increase of initial dye concentration decrease the removal rate. Under optimum conditions the photo-Fenton process is found to be more efficient than Fenton process. About 2% of colour resurgens was observed at the end of the reaction.

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