DOI: https://doi.org/10.55373/mjchem.v25i3.74

Keywords: Coagulation-flocculation kinetic; electrocoagulation; particles distribution behaviour; plate resistance; vibration-induced electrodes

Abstract

The role of gas bubbles in electrocoagulation is significant as it will determine the efficient mass transfer of the coagulant ions and help in the flocculation-flotation process. However, the drawbacks on the accumulation and adherence of gas bubbles on the electrode surface during the treatment have not been thoroughly studied and the particles distribution behaviour have not been the main focused in research on the enhancement and modification made on the electrocoagulation. This study assessed the plate resistance, zeta potential, kinetics of coagulation-flocculation and particle distribution behaviour of a new batch-electrocoagulation treatment with vibration-induced electrodes. It was determined that treatment using the electrocoagulation with vibration-induced plate showed 4 – 20% reduction on the plate resistance compared to electrocoagulation with stationary plates. In addition, the electrocoagulation with vibration-induced plates approached a faster rate of coagulation-flocculation with the Brownian diffusion kinetic data followed the second order reaction and a rate constant of 0.0001 L.mg-1min-1. From the particle distribution behaviour, the coagulation-flocculation mechanism of the electrocoagulation was dominantly achieved through charge neutralization. The vibration of electrodes able to improve the performance of electrocoagulation by reducing the bubbles adherence and accumulation surrounding the electrode plates leading to enhanced plate resistance compared to stationary plates.