USE OF FE-EDTA AS A COAGULANT FOR REGULATION OF CYANOBACTERIA AMOUNT

The work is devoted to the study of the effectiveness of iron-based coagulants in combating cyanobacteria, in particular Microcystis sp., in the aquatic environment. During the experiment, the effect of various compounds (FeSO4 and Fe-EDTA) on morphological changes in the cyanobacterial culture, changes in the pH of the medium, and the toxicity of these compounds was evaluated. It was found that iron-based coagulants contribute to the formation of flocs and a decrease in the optical density of the culture, which indicates the efficiency of cell sedimentation. At the same time, the use of the chelated form of iron (Fe-EDTA) demonstrated the best results, with minimal changes in pH and a low level of toxicity. The study confirmed the prospects of using iron-based coagulants to reduce the number of cyanobacteria, which is important for improving water quality and combating algal blooms. Keywords: coagulants, coagulation, cyanobacterial bloom, Microcystis pulverea, cyanobacteria, cyanotoxins