Decolorization and degradation of reactive yellow HF aqueous solutions by electrochemical advanced oxidation processes

Abstract

Textile manufacturing is the one responsible for water bodies' contamination through the discharge of colored wastes. This work presents the study of reactive yellow HF (RYHF) dye degradation under two different electrochemical advanced oxidation processes (EAOP), namely anodic oxidation (AO) and electro-Fenton (EF)/boron-doped diamond (BDD) process. For the AO, 100 and 300 mg/L solutions using Pt and BDD as anodes in a 100 mL stirred tank cell were used, with a supporting electrolyte of 0.05 mol/L of NaSO at pH 3 under 30 and 50 mA/cm current density. The EF/BDD process was carried out in a flow reactor at 4 and 7 L/min to degrade 100, 200, and 300 mg/L RYHF solutions under 50 and 80 mA/cm. UV-Vis determinations were used for decolorization evaluation, while high-performance liquid chromatography (HPLC) method provided information on dye degradation rate.

Recent advances in electrocatalysts for halogenated organic pollutant degradation

“…Additionally, the EF process often exhibits higher activity than EO for the mineralization of HOPs. For example, Guzman and co-workers 241 employed both EO and EF to treat the reactive yellow HF dye, and they found that the •OH generated by the EF process removed more rapidly organic pollutants than EO. An interesting chapter by Oturan, N., and Oturan, M. A. keeps a close eye on important parameters of EF process, including principles, operational parameters, application, heterogeneous EF, and bioelectro-EF, which may benefit researchers in this field.…”

The Dependence of Oxidation Parameters and Dyes’ Molecular Structures on Microstructure of Boron-Doped Diamond in Electrochemical Oxidation Process of Dye Wastewater

“…Table I compares several recently reported degradation efficiencies of BDD electrodes with BDD 18 electrodes in this paper. [32][33][34][35][36][37] It can be seen that BDD 18 electrode has a much higher degradation efficiency than most other BDD electrodes, confirming its excellent electrochemical performance. The high degradation efficiency of BDD 18 electrode is closely related to its microstructure.…”