| Popis: |
Anode material plays big role in electrochemical oxidation process of water treatment. Since its coating composition can affect the degradation path way, the reaction mechanism and the efficiency of electrochemical oxidation process, it is important to identify the optimum conditions of a given material composition of a high electrochemical active area. In this work, central composite design with response surface method was implemented to optimize Ir and Sb contents of Ti/IrO2-Sb2O3 anode. In order to do that, response factors (i.e. anodic charge and open circuit potential value), which are related to electrochemically active area of the anode were monitored. They were expressed in second-order functions of two factors such as Ir and Sb concentrations. Since these factors showed significant impact on anodic charge and open circuit potential values of the anode, statistical analysis was done in order to gain the understanding of them. ANOVA table results, R2 and Radj values, lack of fit test and p values indicated that the models represent experimental data well. 3-D response surface and 2-D contour plots visualized the effects. Overall analysis of results found that 0.3625 mC anodic charge value and -0.0869 mV open circuit value can be obtained by optimum material conditions of 0.08 g/L and 0.92 g/L Ir and Sb concentrations respectively. |
