Assessment of kinetics behavior of electrocoagulation process for the removal of suspended solids and metals from synthetic water

Abstract

Globalization, industrialization, mining, and uncontrolled population growth have fostered a shortage of potable water. Therefore, it has become imperative to understand an effective and reasonable water purification technique. A renewed interest in electrocoagulation (EC) has been spurred by the search for reliable, cost-effective, water-treatment processes. This paper has elucidated a technical approach for getting rid of heavy metals and total suspended solids (TSS) from synthetic water using an aluminum electrode. The effect of operational parameters, such as current density, inter-electrode distance, operating time, and pH, were studied and evaluated for maximum efficiency. This study corroborates the correlation between current density and removal efficiency. Neutral pH and a low electrode gap have been found to aid the efficacy of the EC setup. The outcome indicates that a maximum TSS removal efficiency of 76.6% occurred at a current density of 5.3 mA/cm 2 during a contact time of 30 min. In the case of heavy metals remediation, 40 min of process time exhibited extremely reduced rates of 99%, 59.2%, and 82.1%, for Cu, Cr, and Zn, respectively. Moreover, kinetic study has also demonstrated that pollutants removal follows first-and second-order model with current density and EC time being dependent.

Removing nitrogenous compounds from landfill leachate using electrochemical techniques

“…Since the Cu layers are deposited on Al substrates, electrocoagulation process may occur during the reaction due to the anodic reaction at Al surface. The anodically generated Al 3+ ions support the electrocoagulation [24,25]. In literature, it has been reported that electrocoagulation process does support the nitrate removal [26].…”

Initial pH Influence on Organic Pollutants, Total Suspended Solids, and Nickel Removal from Citarum River Water Using Electrocoagulation

“…The largest % of total solid suspended removal (40%) occurred at pHi 3. In this research, suspended solid removal is lower than suspended removal (76.6%) from synthetic water using an aluminum electrode [19]. the first 5 minutes Ni removal reached 100% at pHi 5 and 9, 80% at pHi 7.5, and <20% at pHi 3.…”

Electrocoagulation technique for removing Organic and Inorganic pollutants (COD) from the various industrial effluents: An overview

“…Moreover, pH between 5 to 6, the Al(OH) 2+ and Al(OH) 2 + was predominant; pH>9, the Al(OH) 4 was predominant [44]. The Al(OH) 3 having a large surface area helpful to trap the colloidal particles and adsorb the soluble compounds, results, the peak removal efficiency was happen [72,92]. The different metals were influenced in the EC process.…”