1. A study on the separation of cadmium from zinc in synthesized waste cyanide water by precipitation method.
- Author
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Nakahiro Y., Murakawa K., Nakachi S., Wakamatsu T., Nakahiro Y., Murakawa K., Nakachi S., and Wakamatsu T.
- Abstract
An investigation was carried out to determine the effective separation by precipitation of Cd-CN and Zn-CN complexes in synthesized waste water. In order to separate the Cd and Zn it was necessary to decompose the metal cyanide complexes prior to the precipitation treatment. Further investigation indicated that pretreatment by addition of sodium sulphide was effective for the selective precipitation of the Cd-CN complexes. Zn-CN complexes were decomposed by pretreatment with hydrogen peroxide and Zn and cyanide ions were simultaneously precipitated by this method., An investigation was carried out to determine the effective separation by precipitation of Cd-CN and Zn-CN complexes in synthesized waste water. In order to separate the Cd and Zn it was necessary to decompose the metal cyanide complexes prior to the precipitation treatment. Further investigation indicated that pretreatment by addition of sodium sulphide was effective for the selective precipitation of the Cd-CN complexes. Zn-CN complexes were decomposed by pretreatment with hydrogen peroxide and Zn and cyanide ions were simultaneously precipitated by this method.