Catalytic technology for water treatment by micro arc oxidation on Ti–Al alloy

The feasibility of the formation of a liquid plasma catalysis system through micro arc oxidation (MAO) under AC power with titanium–aluminum alloy electrodes was investigated. In the decolorization of organic dyeing wastewater simulated with Rhodamine B, Ti–Al alloy electrodes were superior over Ti electrodes and Al electrodes. The optimal molar percentage of Ti in alloy electrodes was 70% and the optimal decolorization rate was up to 88.9% if the additive suitable for Al was added into the solution to be treated. The decolorization rates were the same in the case of the alloy–alloy electrodes and alloy–Al electrodes. The proportion of the effects of plasma, TiO2 catalyzer during MAO and H2O2 after MAO in decolorization has been obtained. With the catalysis of TiO2 formed on the electrodes, the reaction rate was improved by a maximum of 95% and the decolorization rate was improved by a maximum of 71.6%. Based on the spectral analysis, the plasma catalysis mechanism has been studied.

[1]  T. Chin,et al.  High quality oxide-layers on Al-alloy by micro-arc oxidation using hybrid voltages , 2016 .

[2]  Huicong Liu,et al.  Investigation of micro-arc oxidation coating growth patterns of aluminum alloy by two-step oxidation method , 2015 .

[3]  T. Akiyama,et al.  Excitation temperature of a solution plasma during nanoparticle synthesis , 2014 .

[4]  T. Akiyama,et al.  High-speed camera observation of solution plasma during nanoparticles formation , 2014 .

[5]  Fuzhu Han,et al.  Effects of the ratio of anodic and cathodic currents on the characteristics of micro-arc oxidation ceramic coatings on Al alloys , 2014 .

[6]  Bo Jiang,et al.  Review on electrical discharge plasma technology for wastewater remediation , 2014 .

[7]  R. Morent,et al.  Decomposition of Toluene with Plasma-catalysis: A Review , 2012 .

[8]  Hu Xiao-min,et al.  The study of removing the organic from wastewater by periodically reversing electrocoagulation , 2012, World Automation Congress 2012.

[9]  Yong-jun Liu,et al.  Investigation of liquid plasma catalysis on Ti electrodes for the decolorization of a brilliant red B solution , 2012 .

[10]  F. Golestani-Fard,et al.  In situ derivation of sulfur activated TiO2 nano porous layers through pulse-micro arc oxidation technology , 2011 .

[11]  S. Zanganeh,et al.  Investigation on hydrophilicity of micro-arc oxidized TiO2 nano/micro-porous layers , 2010 .

[12]  Vladimir Demidyuk,et al.  Plasma-catalysis destruction of aromatics for environmental clean-up: Effect of temperature and configuration , 2008 .

[13]  S. Nomura,et al.  Degradation of Methylene Blue by RF Plasma in Water , 2008 .

[14]  Bruce R. Locke,et al.  Electrohydraulic Discharge and Nonthermal Plasma for Water Treatment , 2006 .

[15]  A. Matthews,et al.  Spatial characteristics of discharge phenomena in plasma electrolytic oxidation of aluminium alloy , 2004 .

[16]  Wahyudiono,et al.  Decomposition of methyl orange using pulsed discharge plasma at atmospheric pressure: Effect of different electrodes , 2013 .