Anatoxin-a degradation by using titanium dioxide.

Kaminski, Ariel; Edwards, Christine; Chrapusta-Srebrny, Ewelina; Lawton, Linda A.

Abstract

Advanced oxidation processes, such as using titanium dioxide (TiO2) photocatalysis, are being developed to reduce or eliminate the toxicity of treated water. In this study, the removal of purified anatoxin-a (ANTX-a), live Dolichospermum flos-aquae cells, and a cell extract of this organism under UV-A/TiO2 photocatalysis, creation of decomposition products and their toxicity were investigated. Total degradation of purified ANTX-a from the initial concentration of 10 mg·L−1 with the addition of TiO2 under UV-A irradiation was achieved in 30 min. Under these conditions several decomposition products were noted with m/z ratio from 156.11 to 216.1. Analysis of the completely degraded ANTX-a sample using Thamnotoxkit F™ toxicity test showed that it was no longer toxic. TiO2 photocatalysis was also efficient in the decomposition of the living cyanobacterial cells. Degradation of their cell structures and degradation of released toxin was also achieved in 30 min. Earlier homogenization of cyanobacteria culture significantly accelerated degradation of ANTX-a to 10 min.

Citation

KAMINSKI, A., EDWARDS, C., CHRAPUSTA-SREBRNY, E. and LAWTON, L.A. 2021. Anatoxin-a degradation by using titanium dioxide. Science of the total environment [online], 756, article ID 143590. Available from: https://doi.org/10.1016/j.scitotenv.2020.143590

• Journal Article Type: Article
• Acceptance Date: Oct 31, 2020
• Online Publication Date: Nov 20, 2020
• Publication Date: Feb 20, 2021
• Deposit Date: Nov 27, 2020
• Publicly Available Date: Nov 27, 2020
• Journal: Science of the total environment
• Print ISSN: 0048-9697
• Electronic ISSN: 1879-1026
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 756
• Article Number: 143590
• DOI: https://doi.org/10.1016/j.scitotenv.2020.143590
• Keywords: Anatoxin-a; Cyanobacteria; Degradation; Photocatalysis; Titanium dioxide
• Public URL: https://rgu-repository.worktribe.com/output/998138