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Vol.28, No.1, 32 ~ 40, 1990
Title
Extraction of Cobalt (2) with Liquid Surfactant Membrane Containing D2EHPA from Sulfate Solution
안재우Jae Woo Ahn, 이만승Man Seung Lee, 이응조Eung Cho Lee
Abstract
Research on the extraction of cobalt(II) from sulfate solution by means of liquid surfactant membrane containing D₂EHPA as extractant and SPAN 80 as emulsifier is presented. In this study, it was observed that the extraction rate of cobalt(II) was greatly enhanced by the presence of a sodium acetate and by the increase of pH in the aqueous feed solution. The optimum concentration of D₂EHPA and SPAN 80 in membrane phase were about 5 vol%, 2.5-3.0 vol% respectively. It is also found that the extraction of cobalt ion is promoted as both the Ve/Vw ratio increases and the W/O ratio decreases. But the extraction efficiency of cobalt(II) was reduced with increasing sulfate ions in aqueous feed solution.
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