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Extraction Characteristics of $Cr^{6+}$ from Aqueous Solutions with PC-88A, Alamine 336 and Aliquat 336  

Kim Sung Gyu (한국과학기술연구소 금속공정연구센타)
Lee Hwa Young (한국과학기술연구소 금속공정연구센타)
Oh Jong Kee (한국과학기술연구소 금속공정연구센타)
Publication Information
Resources Recycling / v.11, no.6, 2002 , pp. 18-23 More about this Journal
Abstract
A study on the solvent extraction of hexavalent chromium from aqueous solutions has been investigated. The results showed that the extraction efficiency of chromium increased in proportion to extractant concentration. Aliquat 336 of quarternary amine effectively extracted hexavalent chromium and was superior to Alamine 336. And the stabilizers like polyhydric alcohols of octanol, decanol and dodecanol showed the similar effect fur prevention of third phase and a little promotion of extraction efficiency in comparison with non-use of polyhydric alcohols. On the other hand, in solvent extraction of hexavalent chromium from aqueous solutions, the hexavalent chromium was completely extracted at pH range lower than 7 with 1% Aliquat 336 as extractant and 5% decanol as stabilizer and the hexavalent chromium in extractant was completely stripped with 1M sodium hydroxide solution in the stripping step.
Keywords
Electroplating waste water; Hexavalent chromium; Solvent extraction; PC-88A; Alamine 336; Aliquat 336;
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