Modelling of electrochemical removal of nitrate from water

Modeling of experimental data provides many advantages for the industry, such as eliminating the need for repeating experiments that saves time, cost and resources. In this context, the current preliminary study focuses on modelling the impacts of the inter-electrodes distance (I-ED) (4 to 10 mm) and treatment time (5–25 minutes) on removing nitrate using an electrocoagulation (EC) reactor. Response Surface Methodology -Central Composite Design method was used in the modelling process. The pH of water, current density, and initial nitrate concentration were kept constant at
$9.2\ \mathbf{mA}/\mathbf{cm}^{2}$
and 100 mg/l, respectively. The results showed the best removal of nitrate was 50.95% at I-ED of 4 mm after 25 minutes. High agreement was noticed between experimental and predicted removals
$(\mathbf{R}^{2}=0.9508)$
.