Volume 41, Issue 9 pp. 1857-1870
Research Article

Response Surface Optimization of Dysprosium Extraction Using an Emulsion Liquid Membrane Integrated with Multi-Walled Carbon Nanotubes

Maliheh Raji

Maliheh Raji

University of Tehran, Center for Separation Processes Modeling and Nano-Computations, School of Chemical Engineering, College of Engineering, Enghelab Street, 11365/4563 Tehran, Iran

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Hossein Abolghasemi

Corresponding Author

Hossein Abolghasemi

University of Tehran, Center for Separation Processes Modeling and Nano-Computations, School of Chemical Engineering, College of Engineering, Enghelab Street, 11365/4563 Tehran, Iran

Correspondence: Hossein Abolghasemi ([email protected]), University of Tehran, Center for Separation Processes Modeling and Nano-Computations, School of Chemical Engineering, College of Engineering, Enghelab Street, 11365/4563 Tehran, Iran.Search for more papers by this author
Jaber Safdari

Jaber Safdari

Material and Nuclear Fuel Research School, Nuclear Science and Technology Research Institute, Karegar street, 11365-8486 Tehran, Iran

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Ali Kargari

Ali Kargari

Amirkabir University of Technology, Membrane Processes Research Laboratory (MPRL), Department of Petrochemical Engineering, Hafez street, 15875-4413 Tehran, Iran

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First published: 22 May 2018
Citations: 25

Abstract

A new emulsion liquid membrane was prepared for dysprosium (Dy) extraction from aqueous solution using multi-walled carbon nanotubes (MWCNTs). The influence of MWCNT concentration, carrier and surfactant concentration, stirring speed, feed-phase pH, and internal phase concentration and their interactive effects were studied. A regression model for Dy extraction was developed and the parameters were optimized by response surface methodology. The extent of extraction increases with higher MWCNT concentration up to a certain level. The Dy extraction through the liquid membrane containing MWCNT improves with time. Moreover, the overall mass transfer coefficient was enhanced in the presence of MWCNT due to the formation of a more stable emulsion and liquid membrane.

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