Abstract
Abstract Precipitate and adsorbing colloid flotation techniques are used to remove simple and complexed cyanides from aqueous solutions. Adsorbing colloid flotation using ferric hydroxide and sodium lauryl sulfate at pH's of around 5 seems to be effective for removing complexed cyanides; free cyanide is removed by formation of ferric ferrocyanide followed by adsorbing colloid flotation. Zinc is not as well removed in these procedures as are copper, chromium, nickel, and cobalt.
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