Study On Degradation Of Biorefractory Poisonous Organic Wastewater By UV/Fe～(3+)/H₂O₂ System

At first, the various treatment techniques of biorefiactory poisonous organic pollutants are introduced, their characteristics and advances are also assessed. Then, on the base of analysis of the oxidation power, characteristic, and reaction mechanism of UV/Fe³⁺/H₂O₂ reagent a conclusion is draw that the UV/Fe³⁺/H₂O₂ reagent is promising for the treatment of biorefractory poisonous organic pollutants. The affecting factors and their mechanisms, characteristic, dynamics, and catalyzing in treating dye stuff , refractory and yeast-making wastewaterby UV/Fe³⁺/H₂O₂ reagent are investigated.Photocatalytic degradation of reactive brilliant orange X-GN dye stuff wasstudied in an self-made Photocatalytic reactor with Fe³⁺/H₂O₂ and 8W low mercury light( A. =254nm). Then the experiments by changing the amount of initial X-GN, Fe³⁺ , H₂O₂ dose, initial pH and temperature weTe made. The results indicate that UV/Fe³⁺/H₂O₂ can degrade the organics which have the stable structure and 100% of colour removal and 90.15% of TOC reduction were achieved at pH=3. 0, T=50 ℃ ,T=120min,[Fe³⁺]=2.5 × 10^-5mol/L,[H₂O₂]=1.5 × 10^-4mol/L to 200mg/L X-GN-containing simulated wastewater. The first order kinetic models based on reaction process data were set up for the degradation of X-GN and TOC, respectively. The activation energy of based on X-GN and TOC is 8.67kJ/mol and 25.38kJ/mol. The intermediates and lastness produced during the UV/Fe³⁺/H₂O₂ reaction was detected by IC and GC-MS spectra. Possible mechanism and pathway of the UV/Fe³⁺/H₂O₂ reaction in X-GN wastewater was proposed on the basis of experimental results. The intermediates and final produced during the UV/Fe³⁺/H₂O₂ reaction was detected by IC and GC-MS spectra.Treatment of refractory complexing copper and nickel wastewater has been carried out by UV/Fe³⁺/H₂O₂ oxidation—coagulation process. The effects of initial pH on wastewater, H₂O₂ and Fe³⁺ doses, reaction time , temperature, pH and mass...