Abstract
ABSTRACTA fundamental study on using emulsion liquid membranes(ELMs) with modified quaternary amine salt to extract copper and cyanide from waste cyanide solutions has been conducted. Both copper and cyanide can be effectively extracted by ELMs. A low pH of the external phase favors copper and cyanide extraction. A high molar ratio of CN/Cu tends to suppress copper extraction and results in more extraction of free cyanide. A high copper concentration in the external phase results in high transport of copper and cyanide. ELMs formed with the recovered membrane materials can be effectively re-used for recovering copper and cyanide from waste cyanide solutions.
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