This study investigated UV and solar photocatalysis of organic pollutants in municipal wastewater using metal-ion (Ag, Cu and Fe) doped TiO2 photocatalysts. The effects of pH and catalyst dosage on photocatalytic performance were determined. The best performance was obtained using 0.5 g/L catalyst concentration and pH 6, and the treated water met specific requirements of the drinking water quality standards (phenol ≤10 μg/L) and wastewater effluents for discharge chemical oxygen demand (COD) levels (<30 mg/L). The photocatalysts were effective under both UV and visible light, thereby overcoming the limitation of TiO2 which is only effective under UV light.
Mecha, A. C., Onyango, M. S., Ochieng, A., Jamil, T. S., Fourie, C. J. S., & Momba, M. N. B. (2016). UV and solar light photocatalytic removal of organic contaminants in municipal wastewater. Separation Science and Technology, 51(10), 1765-1778. https://doi.org/10.1080/01496395.2016.1178290