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Tawfik Ahmed Alalm Mohamed Gar Awad Hanem M. Islam Muhammad Qyyum Muhammad Abdul Al-Muhtaseb Ala’a H. Osman Ahmed I. Lee Moonyong 《Environmental Chemistry Letters》2022,20(3):1839-1862
Conventional methods to clean wastewater actually lead to incomplete treatments, calling for advanced technologies to degrade recalcitrant pollutants. Herein we review solar photo-oxidation to degrade the recalcitrant contaminants in industrial wastewater, with focus on photocatalysts, reactor design and the photo-Fenton process. We discuss limitations due to low visible-light absorption, catalyst collection and reusability, and production of toxic by-products. Photodegradation of refractory organics by solar light is controlled by pH, photocatalyst composition and bandgap, pollutant properties and concentration, irradiation type and intensity, catalyst loading, and the water matrix.
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