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Extraction of cobalt by the AOT microemulsion system

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Abstract

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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Acknowledgment

The authors acknowledge the financial support for this study from the National Basic Research Program of China (973 Program, grant no. 2011CB935901), National Natural Science Foundation of China (grant no. 20876089 and 21076115) and Natural Science Foundation of Shandong province (No. ZR2010BM019).

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Authors and Affiliations

  1. Key Laboratory of Special Functional Aggregated Materials of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China

    K. Shang, Y. Z. Yang, J. X. Guo, W. J. Lu, F. Liu & W. Wang

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  1. K. Shang
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  2. Y. Z. Yang
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  3. J. X. Guo
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  4. W. J. Lu
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  5. F. Liu
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Correspondence to Y. Z. Yang or J. X. Guo.

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Shang, K., Yang, Y.Z., Guo, J.X. et al. Extraction of cobalt by the AOT microemulsion system. J Radioanal Nucl Chem 291, 629–633 (2012). https://doi.org/10.1007/s10967-011-1443-x

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  • DOI: https://doi.org/10.1007/s10967-011-1443-x

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