Work

Electrochemical removal of crystal violet dye from simulated wastewater by stainless steel rotating cylinder anode: COD reduction and decolorization

Year: 2024

Type: article

Abstract: Crystal violet dye is a harmful organic pollutant when it exists in wastewater. It may potentially cause renal failure and respiratory issues in humans, while it is considered carcinogenic and mutagenic in aqua life. In this study, crystal violet dye was electrochemically removed from simulated wastewater using a stainless-steel rotating cylinder anode. Effects of anode rotation rate (250–500 rpm), applied current (400–750 mA), concentration of supporting electrolyte (0.3–0.6 M), and time (30–70 min) on chemical oxygen demand (COD) reduction and colour removal were studied. The experimental results were correlated by two quadratic regression models: one for COD reduction with R 2 equals to 0.859, and one for colour removal with R 2 equals to 0.934. Process optimization was conducted using the response surface methodology (RSM) with a rotatable central composite design CCD. The results showed that the optimum conditions for maximum COD reduction (86.89 %) and maximum colour removal (88 %) are as follows: anode rotation rate = 625 rpm, applied current = 658.568 mA, supporting electrolyte = 0.422 M and treatment time = 90 min. Generally, all the studied factors have a potential effect on the process efficiency.

Source: Desalination and Water Treatment

DOI: 10.1016/j.dwt.2024.100787

Authors: Anas Bdiwi Salman, Raid Tariq Al-khateeb, Safa Nabeel Abdulqahar

Institutions: Al-Muthanna University, University of Baghdad

Language: English

Topic: Advanced oxidation water treatment

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: gold

Estimated APC paid: $1,000