Photocatalytic Degradation of Recalcitrant Pollutants of Greywater

Author:

Aslam MohammadORCID,Fazal Dawood Bin,Ahmad FaizanORCID,Fazal Abdullah Bin,Abdullah Ahmad Zuhairi,Ahmed MukhtarORCID,Qamar MohammadORCID,Rafatullah MohdORCID

Abstract

These days, many countries have a water shortage and have limited access to clean water. To overcome this, a new treatment is emerging, namely, the photocatalytic processing of greywater. Photocatalytic processes to remove the organic matter from different greywater sources are critically reviewed. Their efficiency in degrading the organic matter in greywater is scrutinized along with factors that can affect the activity of photocatalysts. Modified TiO2, ZnO and TiO2 catalysts show great potential in degrading organic materials that are present in greywater. There are several methods that can be used to modify TiO2 by using sol-gel, microwave and ultrasonication. Overall, the photocatalytic approach alone is not efficient in mineralizing the organic compounds, but it works well when the photocatalysis is combined with oxidants and Fe3+. However, factors such as pH, concentration and catalyst-loading of organic compounds can significantly affect photocatalytic efficiency.

Funder

Universiti Sains Malaysia

Publisher

MDPI AG

Subject

Physical and Theoretical Chemistry,Catalysis

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