电化学类芬顿（Electro-Fe2+/EDTA）体系降解染料废水研究

o improve the utilizing efficiency of Fe2+ and H2O2 in traditional Fenton system, a novel combined electrochemical Fenton-like system was proposed in this study, where activation of O2 via Fe2+-EDTA complex to hydroxyl radical and electrochemical regeneration of Fe2+ species would occur simultaneously. It was demonstrated that the system could efficiently degrade an azo dye pollutant Rhodamine B (RhB) and 94.5% removal efficiency was obtained after 3h treatment. Furthermore, response surface methodology (RSM) was used to optimize the important operation parameters in this system and Box-Behnken design (BBD) was adopted. pH, Fe2+ and EDTA dosing ratio and initial RhB concentration were investigated. It was found that the obtained model could successfully predict the degradation efficiency of RhB at optimized conditions, while pH and Fe2+/EDTA would significantly affect the degradation efficiency.