Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 291, Issue 3, Pages 629-633Publisher
SPRINGER
DOI: 10.1007/s10967-011-1443-x
Keywords
Microemulsion; Extraction; AOT; Cobalt
Funding
- National Basic Research Program of China (973 Program) [2011CB935901]
- National Natural Science Foundation of China [20876089, 21076115]
- Natural Science Foundation of Shandong province [ZR2010BM019]
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The extraction of cobalt by Winsor II microemulsion system was studied. In the bis (2-ethylhexyl) sulfosuccinate sodium salt (AOT)/n-pentanol/n-heptane/NaCl system, AOT was used as a anionic surfactant to form microemulsion in n-heptane, n-pentanol was injected in the microemulsion as a cosurfactant. Co(II) was found to be extracted into the microemulsion phase due to ion pair formation such as Co2+(R-SO3 (-))Cl. The influence of different parameters such as the volume ratio of aqueous phase to microemulsion, surfactant concentration, pH of the feed solutions, cosurfactant concentration as well as temperature on the extraction yield (E%) were investigated. The results showed that it was possible to extract 95% of cobalt by the AOT Winsor II microemulsion.
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