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- Title
阴极阳极协同电催化降解高硫酸盐废水中活性染料.
- Authors
刘楚楚; 金春姬; 孙 楠; 高孟春
- Abstract
A carbon black/polytetrafluoroethylene(C/PTFE) gas diffuser electrode was prepared by the roller com⁃ paction method and its micro-structure was characterized. An electrocatalytic oxidation system using a boron-doped diamond as anode and a C/PTFE gas diffuser electrode as cathode was constructed. The reactive brilliant blue X− BR in high sulfate wastewater was treated cooperatively by combining sulfate activation technology at anode with insitu synthesis of H2O2 technology at cathode. The results showed that when the prepared C/PTFE electrode was used as the cathode, the removal effect of active brilliant blue X−BR in electro-activated sulfate system was better than that in platinum(Pt) cathode system and stainless steel(SS) system. According to the quenching experiment, the interaction between the highly active substances such as SO4- and ·OH produced by the electrochemical system of BDD/ (C/PTFE) provided the bulk sustainable oxidation capacity for the degradation of reactive brilliant blue X −BR, and the contribution of these two substances to the removal of active brilliant blue X − BR were 54.51% and 25.75%, respectively. A quadratic model of TOC removal rate and unit energy consumption in electrochemical oxidation system was established. The operational parameters of reactive brilliant blue X−BR degradation were optimized by experimental design matrix. Under optimized conditions (initial pH=5.0, current density=120 mA/cm², CNa2SO4 =0.25 mol/L, Cactive brilliant blue X−BR=1 000 mg/L), and electrolysis for 120 min, the removal rate of TOC in wastewater was 63.86% and the unit energy consumption of the system was 256.02 kW·h/kg. The reactive brilliant blue X−BR in water could be completely mineralized by continued electrolysis to 240 min. The results provide theoretical support for the dual-electrode collaborative electrocatalytic oxidation treatment of high sulfate organic wastewater.
- Subjects
CARBON-black; POLYTEF; OXIDATION; ANODES; SEWAGE
- Publication
Industrial Water Treatment, 2024, Vol 44, Issue 4, p127
- ISSN
1005-829X
- Publication type
Article
- DOI
10.19965/j.cnki.iwt.2023-0294