Zur Toxizität einfacher und komplexer Cyanide gegenüber Wasserorganismen

Abstract

SumnLary:The toxic effects of alkali cyanide, complex cyanide-containing heavy metal saltsas of iron, cadmium, copper, nickel and mercury-were invest,igat,ed according to standard methods with the aid of the test organisms Poecilia reticulnta (guppy) as well as t'he green alga Ankistrodesrnus faleatus (B-bis a-mesosaprobic). Since various complex compounds can be photolytically decomposed, also discontinuous light-dark phases were used. As discussed equilibrium calciilation~ have shown. inter alia also the pH-value is iriiportant' in t,he fish organisms used with different react,ions to ions and molecularly dissolred conipoimds. The resnlts are summarized in tables and gmphir representations, the substances investigakd being classified into groups witah "strong" and "high" toxic act'ions.