Occurrence, control, and persistence of the cyanobacterial toxin, microcystin-LR.

摘要

reshwater cyanobacteria are known to produce a family of at least 50 cyclic hepatotoxins called microcystin (MCYST). Microcystin-LR (MCLR), the most commonly reported potent MCYST, was frequently found in three drinking water supply lakes (Little Beaver, Driedmeat, and Coal) in Alberta from 1991-1993. Two genera of cyanobacteria found in these lakes, Microcystis and Anabaena, were reported to produce MCLR. However, MCLR concentration, expressed as ;The effects of two alternative approaches for chemical removal of phytoplankton was examined first in a laboratory setting with freshly collected phytoplankton (1 g;Two primary pathways were considered as natural routes of MCLR removal: accumulation in bottom sediment and biotransformation. In the sorption experiments, MCLR did not partition onto lake sediments (P