Kinetics and Energetic Parameters Study of Phenol Removal from Aqueous Solution by Electro-Fenton Advanced Oxidation Using Modified Electrodes with PbO2 and Graphene

Abstract

The Electro-Fenton oxidation process is one of the essential advanced electrochemical oxidation processes used to treat Phenol and its derivatives in wastewater. The Electro-Fenton oxidation process was carried out at an ambient temperature at different current density (2, 4, 6, 8 mA/cm2) for up to 6 h. Sodium Sulfate at a concentration of 0.05M was used as a supporting electrolyte, and 0.4 mM of Ferrous ion concentration (Fe2+) was used as a catalyst. The electrolyte cell consists of graphite modified by an electrodepositing layer of PbO2 on its surface as anode and carbon fiber modified with Graphene as a cathode. The results indicated that Phenol concentration decreases with an increase in current density, and the minimum Phenol concentration obtained after 6 h of electrolysis at 8 mA/cm2 is equal to 7.82 ppm starting from an initial concentration about 155 ppm. The results obtained from the kinetic study of Phenol oxidation at different current density showed that the reaction followed pseudo first-order kinetics regarding current density. Energetic parameters like specific power consumption and current efficiency were also estimated at different current density. The results showed that an increase in current density caused an increase in the specific power consumption of the process and decreased current efficiency.

Phenol Adsorption from Simulated Wastewater Using Activated Spent Tea Leaves

“…Phenol is readily absorbed via skin contact, inhalation, or ingestion [3]. Due to its dangerous effects in tiny doses, the Environmental Protection Agency (USEPA) has categorized phenol as a priority pollutant, requiring treatment even if a phenol concentration is less than 1 ppm before release [4].…”

Removal of E133 brilliant blue dye from artificial wastewater by electrocoagulation using cans waste as electrodes

“…Electrochemical methods can be applied for the targeted removal of different organic and inorganic contaminants from various wastewaters due to their advantages, which include high removal efficiencies and low costs 17–21 . Furthermore, these processes are among the most eco‐friendly approaches 22–26 .…”

“…7,15,16 Electrochemical methods can be applied for the targeted removal of different organic and inorganic contaminants from various wastewaters due to their advantages, which include high removal efficiencies and low costs. [17][18][19][20][21] Furthermore, these processes are among the most eco-friendly approaches. [22][23][24][25][26] Among different electrochemical approaches, electrocoagulation (EC) is an environmentally friendly process that has been promoted as optimal due to its flexibility and compatibility.…”

Performance of Electro-Fenton Process for Phenol Degradation Using Nickel Foam as a Cathode

“…EF is one of the most important AOPs because it reduces the cost and risk of transporting hydrogen peroxide (H2O2) when compared to other methods. The power used for the EF process is pure and pollution-free; it also does not produce secondary pollutants [15]. AOPs have gained popularity in physic-chemical systems because they enable the production of hydroxyl radicals (OH • ) which are non-selective oxidants that can react with several organic molecules very quickly [16].…”