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Review

Emerging Contaminants: An Overview of Recent Trends for Their Treatment and Management Using Light-Driven Processes

Department of Civil and Environmental Engineering, Faculty of Engineering, National University of Singapore, Block E1A, #07-01, 1 Engineering Drive 2, Singapore 117576, Singapore
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Maurizio Barbieri
Water 2021, 13(17), 2340; https://doi.org/10.3390/w13172340
Received: 2 August 2021 / Revised: 20 August 2021 / Accepted: 21 August 2021 / Published: 26 August 2021
(This article belongs to the Special Issue AOP Processes for Organics Removal in Water and Wastewater)
The management of contaminants of emerging concern (CECs) in water bodies is particularly challenging due to the difficulty in detection and their recalcitrant degradation by conventional means. In this review, CECs are characterized to give insights into the potential degradation performance of similar compounds. A two-pronged approach was then proposed for the overall management of CECs. Light-driven oxidation processes, namely photo/Fenton, photocatalysis, photolysis, UV/Ozone were discussed. Advances to overcome current limitations in these light-driven processes were proposed, focusing on recent trends and innovations. Light-based detection methodology was also discussed for the management of CECs. Lastly, a cost–benefit analysis on various light-based processes was conducted to access the suitability for CECs degradation. It was found that the UV/Ozone process might not be suitable due to the complication with pH adjustments and limited light wavelength. It was found that EEO values were in this sequence: UV only > UV/combination > photocatalyst > UV/O3 > UV/Fenton > solar/Fenton. The solar/Fenton process has the least computed EEO < 5 kWh m−3 and great potential for further development. Newer innovations such as solar/catalyst can also be explored with potentially lower EEO values. View Full-Text
Keywords: emerging contaminants; advanced oxidation process; environmental pollutant management; light-driven technology; EEO emerging contaminants; advanced oxidation process; environmental pollutant management; light-driven technology; EEO
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MDPI and ACS Style

Lee, B.C.Y.; Lim, F.Y.; Loh, W.H.; Ong, S.L.; Hu, J. Emerging Contaminants: An Overview of Recent Trends for Their Treatment and Management Using Light-Driven Processes. Water 2021, 13, 2340. https://doi.org/10.3390/w13172340

AMA Style

Lee BCY, Lim FY, Loh WH, Ong SL, Hu J. Emerging Contaminants: An Overview of Recent Trends for Their Treatment and Management Using Light-Driven Processes. Water. 2021; 13(17):2340. https://doi.org/10.3390/w13172340

Chicago/Turabian Style

Lee, Brandon C.Y., Fang Y. Lim, Wei H. Loh, Say L. Ong, and Jiangyong Hu. 2021. "Emerging Contaminants: An Overview of Recent Trends for Their Treatment and Management Using Light-Driven Processes" Water 13, no. 17: 2340. https://doi.org/10.3390/w13172340

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