Study On Fenton Reagent For Treatment Of Acid Rose Red B Dyed Wastewater

Acid Rose Red B dyed wastewater is one of bio-refractory poisonous wastewater.If treated by traditional methods, the efficiency is low. Fenton reagent has a superoxidation and appeared to be applicable for the treatment of bio-refractory wastewater,so Fenton reagent reaction has become one of effective means in the treatment andcontrol of waster water. Fenton reagent was used to treat Acid Rose Red B dyed wastewater. In order toconfirm the optimum response condition, the main factors influencing efficiency wereinvestigated one by one. When pH﹑the concentrations of H₂O₂ and Fe²⁺ were 3.0﹑50mmol/l and 8mmol/l, respectively, the experimental results indicated that theremoval rate of CODcr could reach 77.1% and the removal rate of Acid Rose Red Bwas 92.8% under the raw wastewater Acid Rose Red B 300 mg/L. In addition, thepaper studied the effect of reaction temperature﹑ultraviolet radiation and stir velocityon treatment efficiency and the effect of the dosage of H₂O₂ on the removal of TOC.The law of oxidation reduction electric potential under various dosage of H₂O₂ wasprobed, and the biodegradability of Acid Rose Red B before oxidation and afteroxidation was discussed.In this paper, the effect of some inorganic ions on Fenton reaction was studied bychoosing some representative inorganic ions, and the mechanism was discussed.Experimental results showed that S^2- had great influence on catalysis ability of Fentenreagent, H₂PO₄^-and Cl-suppressed the decomposition of Acid Rose Red B in thefollowing sequence H₂PO₄^->Cl^-;Cu²⁺and Mn²⁺ also lowered the treatment efficiencyto some extent;SO₄^2-,NO₃^-,Mg²⁺,Zn²⁺ nearly had no effect on the removal rate ofAcid Rose Red B.On the basis of the rules of the rules of catalytic decomposition of Acid Rose RedB, the correlative between remain Acid Rose Red B under different oxidation timeand reaction time was analyzed by the monoacid regression equation, reaction kineticsequation was derived.Finally, the wastewater, both before oxidation and after oxidation, wasinvestigated using ultraviolet spectrum and IR. Degradation products of Acid RoseRed B were conjectured and degradation pathway of Acid Rose Red B was discussedby means of the two spectrums in order to better understand the oxidation mechanismof Acid Rose Red B by hydroxyl radical. It provided the theoretical basis for theapplication of Fenton reagent in the treatment of dyed wastewater.