Sensitised decomposition of microcystin-LR using UV radiation.
UV radiation was applied to degrade cyanobacterial hepatotoxin, microcystin-LR in the presence of phycocyanin as a model natural sensitiser. The concentrations of both the toxin and the pigment used in the experiments were higher by several orders of magnitude than found in the environment. The photoreaction parameters were optimised. The process was found to be of limited use for water treatment due to its low efficacy. Additionally, pronounced UV-induced bleaching of the pigment significantly reducing the photoreaction rates of the toxin was observed for the highest UV radiation intensities applied.
Department of Plant Physiology and Development, Faculty of Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland. pgajdek@mol.uj.edu.pl
Piotr
P
Gajdek
Beata
B
Bober
Ewa
E
Mej
Jan
J
Bialczyk
D001673:Biodegradation, Environmental; D007700:Kinetics; D008387:Marine Toxins; D052998:Microcystins; D008954:Models, Biological; D010456:Peptides, Cyclic / Q000737:chemistry / Q000378:metabolism* / Q000528:radiation effects; D038761:Photobleaching / Q000528:radiation effects; D010782:Photolysis / Q000528:radiation effects; D010860:Pigments, Biological / Q000378:metabolism / Q000528:radiation effects; D014118:Toxins, Biological / Q000378:metabolism / Q000528:radiation effects; D014466:Ultraviolet Rays; D018508:Water Purification / Q000379:methods*
D008387:Marine Toxins; D052998:Microcystins; D010456:Peptides, Cyclic; D010860:Pigments, Biological; D014118:Toxins, Biological; C057862:cyanoginosin LR