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Anatoxin-a degradation by using titanium dioxide.

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

Authors

Ariel Kaminski

Ewelina Chrapusta-Srebrny



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