Metal oxide-coated anodes in wastewater treatment.
ABSTRACT Electrochemical oxidation is an effective wastewater treatment method. Metal oxide-coated substrates are commonly used as anodes in this process. This article compiles the developments in the fabrication, application, and performance of metal oxide anodes in wastewater treatment. It summarizes the preparative methods and mechanism of oxidation of organics on the metal oxide anodes. The discussion is focused on the application of SnO2, PbO2, IrO2, and RuO2 metal oxide anodes and their effectiveness in wastewater treatment process.
- SourceAvailable from: Manpreet Bhatti[Show abstract] [Hide abstract]
ABSTRACT: http://www.tandfonline.com/doi/abs/10.1080/19443994.2014.937763#.U-typOOSxuA The aim of the present study is to investigate the potential of electrolytic process on textile dyebath dump wastewater (sulfate concentration ~30 g/L) collected from the cotton fabric dyeing process to remove color and COD concentration. Four different electrode combinations were tested i.e. stainless steel–stainless steel, iron–iron, aluminum–aluminum, and iron (anode)–aluminum (cathode) for best removal efficiency and minimum power consumption along with sludge generation rate. The significant process parameters (voltage/current density and treatment time) were optimized for real industrial wastewater using response surface methodology approach. COD removal efficiency and color removal efficiency were taken as two responses. The best electrode combination was Fe–Al to achieve 75% COD removal efficiency and 91% color removal efficiency. The optimized process conditions are 7.6 V (1242 A/m2) and 14 min treatment time consuming 59 kWh/kg of COD removal with sludge generation rate of 24.1 g/L.Desalination and water treatment 07/2014; · 0.85 Impact Factor