Comparison of UV-A photolytic and UV/TiO2 photocatalytic effects on Microcystis aeruginosa PCC7813 and four microcystin analogues: A pilot scale study
| Autor: | Christine Edwards, John T. S. Irvine, Ross N. Gillanders, Indira Menezes, Jianing Hui, H. Q. Nimal Gunaratne, José Capelo-Neto, Carlos J. Pestana, Graham A. Turnbull, Peter K. J. Robertson, Allan Clemente, Linda A. Lawton |
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| Přispěvatelé: | EPSRC, University of St Andrews. School of Chemistry, University of St Andrews. Centre for Energy Ethics, University of St Andrews. Centre for Designer Quantum Materials, University of St Andrews. EaSTCHEM, University of St Andrews. School of Physics and Astronomy, University of St Andrews. Sir James Mackenzie Institute for Early Diagnosis, University of St Andrews. Centre for Biophotonics |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Cyanobacteria
Environmental Engineering Cyanotoxins NDAS Microcystin Management Monitoring Policy and Law chemistry.chemical_compound Water treatment QD Microcystis aeruginosa Irradiation Waste Management and Disposal chemistry.chemical_classification biology Photodissociation QR Microbiology General Medicine QD Chemistry biology.organism_classification AC QR Blue-green algae chemistry Titanium dioxide Photocatalysis SDG 6 - Clean Water and Sanitation Nuclear chemistry |
| Zdroj: | Menezes, I, Capelo-Neto, J, Pestana, C J, Clemente, A, Hui, J, Irvine, J T S, Nimal Gunaratne, H Q, Robertson, P K J, Edwards, C, Gillanders, R N, Turnbull, G A & Lawton, L A 2021, ' Comparison of UV-A photolytic and UV/TiO2 photocatalytic effects on Microcystis aeruginosa PCC7813 and four microcystin analogues: A pilot scale study ', Journal of Environmental Management, vol. 298, 113519 . https://doi.org/10.1016/j.jenvman.2021.113519 |
| DOI: | 10.1016/j.jenvman.2021.113519 |
| Popis: | The authors would like to thank the Engineering and Physical Sciences Research Council (EPSRC) [EP/P029280/1], the Coordination for the Improvement of Higher Education Personnel - CAPES [PROEX 20/2016 and PrInt 88887.311806/2018–00], and the Brazilian National Research Council – CNPq [403116/2016–3 and 304164/2017–8] for funding this research. As per EPSRC requirement all data will be made publicly available via the Robert Gordon University's open access repository OpenAIR@RGU. Further, the first author also acknowledges the scholarship from the Brazilian National Research Council - CNPq. To date, the high cost of supplying UV irradiation has prevented the widespread application of UV photolysis and titanium dioxide based photocatalysis in removing undesirable organics in the water treatment sector. To overcome this problem, the use of UV-LEDs (365 nm) for photolysis and heterogeneous photocatalysis applying TiO2 coated glass beads under UV-LED illumination (365 nm) in a pilot scale reactor for the elimination of Microcystis aeruginosa PCC7813 and four microcystin analogues (MC-LR, -LY, -LW, -LF) with a view to deployment in drinking water reservoirs was investigated. UV-A (365 nm) photolysis was shown to be more effective than the UV/TiO2 photocatalytic system for the removal of Microcystis aeruginosa cells and microcystins. During photolysis, cell density significantly decreased over 5 days from an initial concentration of 5.8 × 106 cells mL−1 until few cells were left. Both intra- and extracellular microcystin concentrations were significantly reduced by 100 and 92 %, respectively, by day 5 of the UV treatment for all microcystin analogues. During UV/TiO2 treatment, there was great variability between replicates, making prediction of the effect on cyanobacterial cell and toxin behavior difficult. Postprint Postprint |
| Databáze: | OpenAIRE |
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