Ti/RuO 2 -IrO 2 -SnO 2 Anode for Electrochemical Degradation of Pollutants in Pharmaceutical Wastewater: Optimization and Degradation Performances

Guozhen Zhang, Xingxing Huang, Jinye Ma, Fuping Wu and Tianhong Zhou
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Guozhen Zhang: Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China
Xingxing Huang: Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China
Jinye Ma: Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China
Fuping Wu: Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China
Tianhong Zhou: Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China

Sustainability, 2020, vol. 13, issue 1, 1-12

Abstract: Electrochemical oxidation technology is an effective technique to treat high-concentration wastewater, which can directly oxidize refractory pollutants into simple inorganic compounds such as H 2 O and CO 2 . In this work, two-dimensionally stable anodes, Ti/RuO 2 -IrO 2 -SnO 2 , have been developed in order to degrade organic pollutants from pharmaceutical wastewater. Characterization by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD) showed that the oxide coating was successfully fabricated on the Ti plate surface. Electrocatalytic oxidation conditions of high concentration pharmaceutical wastewater was discussed and optimized, and the best results showed that the COD removal rate was 95.92% with the energy consumption was 58.09 kW·h/kgCOD under the electrode distance of 3 cm, current density of 8 mA/cm 2 , initial pH of 2, and air flow of 18 L/min.

Keywords: electrocatalytic oxidation; pharmaceutical wastewater; Ti/RuO 2 -IrO 2 -SnO 2 anode; COD removal; energy consumption; electrochemistry (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
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