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Photocatalytic treatment of natural waters. Reality or hype? The case of cyanotoxins remediation.

Authors
  • Serrà, Albert1
  • Philippe, Laetitia2
  • Perreault, François3
  • Garcia-Segura, Sergi4
  • 1 Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland. Electronic address: [email protected] , (Switzerland)
  • 2 Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland. , (Switzerland)
  • 3 Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment. School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-3005, USA.
  • 4 Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment. School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-3005, USA. Electronic address: [email protected]
Type
Published Article
Journal
Water research
Publication Date
Jan 01, 2021
Volume
188
Pages
116543–116543
Identifiers
DOI: 10.1016/j.watres.2020.116543
PMID: 33137522
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

This review compiles recent advances and challenges in the photocatalytic treatment of natural water by analyzing the remediation of cyanotoxins. The review frames the treatment need based on the occurrence, geographical distribution, and legislation of cyanotoxins in drinking water while highlighting the underestimated global risk of cyanotoxins. Next, the fundamental principles of photocatalytic treatment for remediating cyanotoxins and the complex degradation pathway for the most widespread cyanotoxins are presented. The state-of-the-art and recent advances on photocatalytic treatment processes are critically discussed, especially the modification strategies involving TiO2 and the primary operational conditions that determine the scalability and integration of photocatalytic reactors. The relevance of light sources and light delivery strategies are shown, with emphasis on novel biomimicry materials design. Thereafter, the seldomly-addressed role of water-matrix components is thoroughly and critically explored by including natural organic matter and inorganic species to provide future directions in designing highly efficient strategies and scalable reactors. Copyright © 2020 The Authors. Published by Elsevier Ltd.. All rights reserved.

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