Biosorption of mycotoxins by waste biomass

The paper presents the results of in vitro studies of the possibility of using waste plant materials: biomass of aquatic weed Myriophyllum spicatum (Eurasian watermilfoil or spiked watermilfoil) and fruit stones (peach and sour cherry) in a natural and chemicaly modified form, as a potential biosorbents of different mycotoxins. Biosorption indexes were examined at pH 3.0, 6.9 or 7.0, respectively in electrolite 0.1 M K2HPO4. The highest biosorption indexes of aflatoxin B1 (AFL B1) were determined by algae M. spicatum (94.70 and 96.00%, respectively). Unmodified peach stones binded less quantities of AFL B1 (73.30 and 80.00%, respectively) while sour cherry stones adsorbed the smallest quantity af applied AFL B1 (58.82 and 41.18 %, respectively). The values of biosorption for ochratoxin A (OTA) varied a grait deal, dipending on the biosorbent type and pH values (20.00­76.20%). The best affinity to vomitoxin (DON-in), was observed by unmodifiedpeache stones (50%), at pH 6.9, and for zearalenone (ZON) by M. spicatum (70 and 75%, respectively). Binding of diacetoxyscirp enol (DAS), although much weaker, was recorded at both pH values of applied electrolite by modified peache stones (16.67 and 33.33%, respectively) and modified sour cherry stones (16.67%). Equally good affinity for T-2 toxin was found in modified peache stones, and unmodified and modified form of sour cherriy stones (50.00 and 40.00%, respectively); at lower pH value (3.0) adsorption of this mycotoxin was more pronaunced. Presented results indicate that the tested waste biomasses, in the natural or modified form, were effective biosorbents of different mycotoxins with the highest affinity for AFL B1.