الفهرس 
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Abstract
In this study, experiments were carried out using an electrochemical cell for iron removal. The influence of different parameters on the removal efficiency was studied. Process control system of the cell was applied. It was based on varying the applied current density with changing feed iron concentrations to produce an environmentally acceptable output. The model equations were solved in steady- and unsteady-state modes to obtain the transfer function. The dynamic model and the results of the calculated responses with and without the suggested control modes of the electrochemical cell are presented using Matlab Simulink software. Based on the Ziegler-Nichols method, the ultimate gain and ultimate period were calculated. Also the values of different controller modes settings were calculated. A feedback control scheme for the cell using a proportional integral controller was suggested since the process has a good speed of response.