Study On Treatment Of Dye Wastewater By Combined Process Using Micro-Electrolysis And Fenton Oxidation Of The Reaction Mechanism

In this dissertation, Acid Red B and Rhodamine B were chosen as research object. Experimental research has been done in degradation of simulative dyestuff wastewater with the adoption of iron-carbon micro-electrolysis and Fenton reaction in joint application. In this dissertation, there are four aspects studied: (1) Treatment conditions of simulative dye wastewater using iron-carbon micro-electrolysis and Fenton reaction were investigated. (2) The degradation characteristics and reaction conditions of simulative dyestuff wastewater were studied particularly under combined process. (3) The degradation mechanism and pathways of pollutants using iron-carbon micro-electrolysis and Fenton reaction are also discussed. Achievements via experiments and analyses are acquired as follow:(1) According to the experimental results, iron-carbon method has effects on the treatment of dye wastewater. The best treatment conditions for simulated dye wastewater are as follows: for 300mL Acid Red B wastewater with the concentration of 2g/L, the best pH, dosage of scrap iron, ratio of Fe/C and the reaction time are 3, 10g, 1:1.1 and 90 min respectively, COD removal rate is 63.5%; for 300mL Rhodamine B wastewater with the concentration of 2g/L, the best pH, dosage of scrap iron, ratio of Fe/C and the reaction time are 3, 10g, 1:1.1 and 90 min respectively, COD removal rate is 37.4%.(2) The best conditions for simulated dye wastewater with combined treatment technology of iron-carbon micro-electrolysis and Fenton reaction are as follows: for 300mL Acid Red B wastewater under iron-carbon treatment process, the best pH, dosage of H2O2 and reaction time were 3, 37mmol/L and 30 min respectively, COD removal rate and percentage of decolority are 85.2% and 93.3%; for 300mL Rhodamine B wastewater under iron-carbon treatment process, the best pH, dosage of H2O2 and reaction time are 3, 38mmol/L and 30 min respectively, COD removal rate and percentage of decolority are 81.6% and 91.2%.(3)The degradation pathways of Acid Red B and Rhodamine B dye wastewater with iron-carbon micro-electrolysis and Fenton oxidative degradation in joint application have been studied by using UV, IR and HPLC-MS Spectra analysis, the results revealed the oxidative degradation rule of azo and Rhodamine dyestuff.