Study On Treatment Of Azo Dyestuff Wastewater By Photo-Fenton

Azo dyestuff is one typical fine chemical products,wastewater of which is troubleindustrial wastewater due to its deep color,high COD, complicated organic components,huge amounts, poison and poor biodegradability,as well as its diffilult degradation byclassic biodegradation,biochemical degradation and physicochemical degradation.Azodyestuff,which is the most complete spectrum,most widely applied and lower price,iswidely applied in textile industry,pring, dyeing and leather industry.extensive researchis underway to develop non-conventional and anvanced technologies for treatment ofazo dyestuff wastewater. Photo-Fenton,one Advanced Oxidation Technilogies,AOTs,degrades contaminantshas many advantages such as fast,being innoxious,operating handily, no secondarypollution,more effectively.it will be widely used in treatment of wastewater, especiallyno-biodegradationwastewater. Photo-Fenton oxidation experiments are conducted by treatment azo dyestuffwastewater such as reactive brilliant red X-3B,acid red B,acid black10B.The effects ofreaction conditions such as the dosage of H2O2 and Fe2+,initial pH,initial azo dyestuffconcentration,reaction temperature,reaction time,light resources and the ways of addingH2O2 and Fe2+ are studied in term of chemical oxygen demand(COD) reamovalefficiencies.Under this conditions of adding Ｈ２Ｏ２(１．５Qth),Ｆｅ２＋:Ｈ２Ｏ２＝１:２０,40℃,pH=３．０,more than ９６％ COD reamoval efficiencies can be achieved after 60min.Photo-Fentontreat industrial dyeing wastewater of containing azo dyestuff that is very effective,butcostly.It is important to associate with other wastewater treatment methods in industrialapplications. The mechanism is explored by the results of experiments. The results showed thatthe ferric complex is main reaction way during degradation of azodyestuff.