| A theoretical model is developed in this research to predict the change of pH during electrochemical remediation process. During electrochemical remediation process electrolyte will experience an alteration in pH due to water electrolysis reaction. The resulted pH change can cause a significant deviation in existed reactions or create new pathways. The reactive solute can be subjected to a variety of chemical changes including reactions such as acid-base reaction, oxidation-reduction, and dissolution-precipitation. Having a mathematical model will create a better understanding of multicomponent species transport mechanisms which is needed to develop the necessary design or analysis tools for engineering the implementation.;Development of the model is based on two type of reactors, completely stirred batch reactor and flow-through reactor. This model accounts for transport mechanisms as well as chemical and electrochemical reactions. A two-step iterative finite difference method is adopted to solve for all the available species in the system. The concentration variables consist of are H +, OH-, CO32-, HCO -3, H2CO3, and CaCO 3 for the flow through reactor and are H+, OH -, SO42-, HSO- 4 for the batch reactor. The result of this study is compared to the obtained experimental data by Ciblak et al [12] for batch reactor and Rajic et al [36] for flow-through reactor. The model predicts the pH change resulted by the electrochemical process and shows a good correlation in comparison to experimental data. |
