Decolourisation of Reactive Orange 4 by Fenton and photo-Fenton oxidation technology

摘要

The photochemical decolourisation of chlorotriazine reactive azo dye Reactive Orange 4 (RO4) has been carried out by Fenton and photo-Fenton processes.The effects of solution pH,applied H_2O_2,Fe~(2+) 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.