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Advanced Oxidation Processes for Wastewater Treatment
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This book chapter reviews advanced oxidation processes (AOPs) for wastewater treatment, covering UV, photocatalytic, ozone, Fenton, and sonochemical technologies that use hydroxyl radicals to degrade organic pollutants including microplastics. The chapter discusses process optimization parameters and the advantages and limitations of each AOP approach.
Advanced oxidation processes (AOPs) are highly efficient wastewater treatment technologies, based on using powerful hydroxyl radicals as oxidants for removal of a variety of impurities and industrial pollutants, such as organic chemicals, dyes, APIs, metals, inorganic chemicals, and microplastics. Different AOP technologies can be designed to use UV irradiation, photocatalysts, ozone, Fenton, and sonochemical processes; and a number of possible combinations may be used, depending on the type and quantity of contaminants present in the wastewater. Future research in the development of AOP technologies should be focused on both better catalyst development as well as better reactor design. This chapter reviews recent advances in various AOP technologies for wastewater treatment, including homogeneous and heterogeneous photocatalytic processes, Fenton, sonochemical, ozone, and wet air oxidation processes. The chapter further details the scope of process optimization parameters such as pH, temperature, concentration of pollutants, catalyst loading, and light intensity. Finally, the chapter details the advantages and disadvantages of different AOP technologies and provides a perspective on the future direction needed in development of AOP technologies for wastewater treatment.
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A Short Review on Recent Advanced Oxidation Technologies for Microplastics Degradation
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This review summarizes recent advances in advanced oxidation technologies (AOTs) for degrading microplastics, evaluating methods such as UV/ozone, Fenton reactions, and photocatalysis. The authors assess the efficiency, scalability, and limitations of each approach for treating microplastic-contaminated water.
Advanced Oxidation Processes (AOPs) for the Degradation of Micro and Nano Plastic
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This review assesses advanced oxidation processes (AOPs) — including photocatalysis, ozone treatment, electrocatalysis, and Fenton reactions — as methods to break down micro- and nanoplastics in water. While AOPs can degrade plastic particles, most currently achieve only modest levels of complete mineralization, meaning significant plastic residues often remain. The study highlights the need to optimize and potentially combine these techniques to develop effective water treatment solutions for removing nanoplastics from drinking water and wastewater.
Advanced oxidation processes for the elimination of microplastics from aqueous systems: Assessment of efficiency, perspectives and limitations
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This review evaluates advanced oxidation processes as a strategy for breaking down microplastics in water systems, comparing techniques such as photocatalysis, Fenton reactions, and ozonation. Researchers found that while these methods show promise for degrading microplastics into smaller, less harmful molecules, challenges remain in scaling them for practical use. The study identifies key limitations and suggests directions for making these technologies more efficient and applicable to real-world water treatment.
Recent advances and challenges in advanced oxidation processes for degradation of nano- and microplastics in water: a critical review
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This critical review evaluates four main advanced oxidation processes — ozonation, photocatalysis, Fenton reactions, and electrochemical oxidation — for breaking down nano- and microplastics in water, summarizing what has been achieved and where major technical gaps remain. Developing effective degradation technologies is urgently needed because conventional water treatment systems do not reliably remove small plastic particles.
Advanced oxidation processes for the degradation of microplastics from the environment: A review
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This review of 54 studies found that advanced oxidation processes including UV photocatalysis, Fenton reactions, and sonolysis can successfully degrade microplastics in water, with all reviewed techniques achieving satisfying performance in degrading various plastic types.
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