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Response Surface Optimization of Dysprosium Extraction Using an Emulsion Liquid Membrane Integrated with Multi‐Walled Carbon Nanotubes
Author(s) -
Raji Maliheh,
Abolghasemi Hossein,
Safdari Jaber,
Kargari Ali
Publication year - 2018
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201700351
Subject(s) - dysprosium , extraction (chemistry) , emulsion , carbon nanotube , materials science , membrane , pulmonary surfactant , chemical engineering , response surface methodology , mass transfer , chromatography , phase (matter) , aqueous solution , mass transfer coefficient , analytical chemistry (journal) , chemistry , inorganic chemistry , composite material , organic chemistry , biochemistry , engineering
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.