Heterogeneous Fenton - Based Treatment for Petroleum Refinery Wastewater: A Systematic Review

Environmentally friendly methods are recommended for the petroleum refining industries, for treatment of the generated wastewater. Ammonia, sulfides, phenol, oil and grease, and petroleum hydrocarbons, and other chemical compounds are only a few of the many pollutants found in effluent from petroleum refineries. Major disadvantages of conventional treatment systems for refinery effluent include low effectiveness, high operating and capital costs, and susceptibility to low toxicity and biodegradability. Refinery wastewater has been treated using a variety of techniques, such as chemical, biological, physical, and hybrid approaches. Advanced oxidation processes (AOPs) have elaborated improved efficacy. Because of its multiple uses, affordability, and environmental friendliness, the Fenton process has emerged as a desirable substitute for other AOPs in the removal of contaminants from water. Therefore, the full comprehension of the Fenton process in petroleum refinery wastewater management is the main subject of this study by going over the major developments in the catalytic oxidation of nano-based Fenton materials for the treatment of petroleum refinery wastewater. Nano-based particles are widely used in Fenton catalysis because of their cheap cost and plentiful supply, particularly α-Fe2O3, as well as their high removal efficiency of chemical oxygen demand (COD) and concentrations of phenol, with an average elimination efficiency surpassing 90%. The current review discusses current developments in the manufacture and use of Fenton catalysts that are heterogeneous for the reduction of organic contaminants. Since the reaction between solid Fenton catalysts and H2O2 can produce extremely reactive hydroxyl radicals (HO%), heterogeneous Fenton reactions have drawn a lot of interest in eliminating stubborn organic pollutants. The aim of this study was to thoroughly examine the studies that have been conducted to improve heterogeneous Fenton reactivity for effective application in treating.