2. Uluslararası Tarım, Çevre ve Sağlık Kongresi, Aydın, Turkey, 18 - 19 October 2019, pp.1-10
Cyanide is a toxic compound, containing a group of triple-bonded carbon and nitrogen atoms. Toxic property of
cyanide has been known for ages and been used as a weapon in Ancient Rome and Egypt. Cyanide is extremely
toxic to aerobic forms of organisms as it easily and tightly binds cytochrome oxidase, which is an enzyme that
takes part in respiratory electron transport. Cyanide blocks vital functions as it inhibits cytochrome oxidase, leads
to decline at cellular ATP production besides central nervous system defects and respiratory disorders. Potassium
cyanide is a colourless crystalline powder formed compound, and is one of the cyanide salts which is extensively
used in electroplating, metal processing, extraction of ores; production of synthetic rubber, plastics, dyes and
pesticides. In this study, ecotoxicological effects of this compound is investigated, as it ends up in the aquatic
environment, just like all other pollutants. Dunaliella viridis, a marine microalgae, was used as the test organism
and exposed to increasing concentrations of potassium cyanide in the range of 10(-7) – 5×10(-4) M for 72 hours.
Growth rates of each group were used to compare to the controls to determine the phytotoxic effects on growth
inhibition. Based on the datasets, IC50 value was found 2,34×10(-5) M.