<p>The process of electrooxidation of the active substances Paracetamol (PCT), benzoquinone (BQ) and hydroquinone (HQ) was studied using a set of different dimensionally stable anode (DSA) and Boron doped diamond (BDD) electrodes. Comparison of the efficiency of electrocatalytic anodes was assessed using percent total organic carbon (%TOC) removal and PCT amount removal values. The removal of %TOC in synthetically prepared waters for the BDD anode reached 96%, for DSA electrodes Ti/PbO<sub>2</sub>-IrO<sub>2</sub>-RuO<sub>2</sub> 57%, Ti/IrO<sub>2</sub>-RuO<sub>2</sub>-TiO<sub>2</sub> 35%, Ti/IrO<sub>2</sub>-RuO<sub>2</sub>-SnO<sub>2</sub> 31%, Ti/RuO<sub>2</sub>-SnO<sub>2</sub> 30% and Pt 24%. BDD effectively degrades PCT and almost completely mineralizes BQ and HQ. A DSA-Ti/PbO<sub>2</sub>-IrO<sub>2</sub>-RuO<sub>2</sub> electrode and a BDD electrode were used in the electrooxidation process of real industrial wastewater containing PCT. The BDD electrode had a TOC removal efficiency of 58%, while the DSA-Ti/PbO<sub>2</sub>-IrO<sub>2</sub>-RuO<sub>2</sub> electrode achieved 52%. Despite similar values ​​of PCT removal by both electrodes, the Ti/PbO<sub>2</sub>-IrO<sub>2</sub>-RuO<sub>2</sub> anode showed low mineralization of organic matter. The originality of this paper lies in the study of the electrooxidation of real PCT wastewater and the use of a Ti/PbO<sub>2</sub>-IrO<sub>2</sub>-RuO<sub>2</sub> electrode.</p> Graphical Abstract <p></p>

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Electrocatalytic Oxidation of Toxic Wastewater using Electrodes based on Transition d-metal Oxides

  • Semra Yaşar Çırak,
  • Dilara Öztürk,
  • Abdurrahman Akyol

摘要

The process of electrooxidation of the active substances Paracetamol (PCT), benzoquinone (BQ) and hydroquinone (HQ) was studied using a set of different dimensionally stable anode (DSA) and Boron doped diamond (BDD) electrodes. Comparison of the efficiency of electrocatalytic anodes was assessed using percent total organic carbon (%TOC) removal and PCT amount removal values. The removal of %TOC in synthetically prepared waters for the BDD anode reached 96%, for DSA electrodes Ti/PbO2-IrO2-RuO2 57%, Ti/IrO2-RuO2-TiO2 35%, Ti/IrO2-RuO2-SnO2 31%, Ti/RuO2-SnO2 30% and Pt 24%. BDD effectively degrades PCT and almost completely mineralizes BQ and HQ. A DSA-Ti/PbO2-IrO2-RuO2 electrode and a BDD electrode were used in the electrooxidation process of real industrial wastewater containing PCT. The BDD electrode had a TOC removal efficiency of 58%, while the DSA-Ti/PbO2-IrO2-RuO2 electrode achieved 52%. Despite similar values ​​of PCT removal by both electrodes, the Ti/PbO2-IrO2-RuO2 anode showed low mineralization of organic matter. The originality of this paper lies in the study of the electrooxidation of real PCT wastewater and the use of a Ti/PbO2-IrO2-RuO2 electrode.

Graphical Abstract