Commenced in January 2007
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Performance Study of Neodymium Extraction by Carbon Nanotubes Assisted Emulsion Liquid Membrane Using Response Surface Methodology

Authors: Payman Davoodi-Nasab, Ahmad Rahbar-Kelishami, Jaber Safdari, Hossein Abolghasemi

Abstract:

The high purity rare earth elements (REEs) have been vastly used in the field of chemical engineering, metallurgy, nuclear energy, optical, magnetic, luminescence and laser materials, superconductors, ceramics, alloys, catalysts, and etc. Neodymium is one of the most abundant rare earths. By development of a neodymium–iron–boron (Nd–Fe–B) permanent magnet, the importance of neodymium has dramatically increased. Solvent extraction processes have many operational limitations such as large inventory of extractants, loss of solvent due to the organic solubility in aqueous solutions, volatilization of diluents, etc. One of the promising methods of liquid membrane processes is emulsion liquid membrane (ELM) which offers an alternative method to the solvent extraction processes. In this work, a study on Nd extraction through multi-walled carbon nanotubes (MWCNTs) assisted ELM using response surface methodology (RSM) has been performed. The ELM composed of diisooctylphosphinic acid (CYANEX 272) as carrier, MWCNTs as nanoparticles, Span-85 (sorbitan triooleate) as surfactant, kerosene as organic diluent and nitric acid as internal phase. The effects of important operating variables namely, surfactant concentration, MWCNTs concentration, and treatment ratio were investigated. Results were optimized using a central composite design (CCD) and a regression model for extraction percentage was developed. The 3D response surfaces of Nd(III) extraction efficiency were achieved and significance of three important variables and their interactions on the Nd extraction efficiency were found out. Results indicated that introducing the MWCNTs to the ELM process led to increasing the Nd extraction due to higher stability of membrane and mass transfer enhancement. MWCNTs concentration of 407 ppm, Span-85 concentration of 2.1 (%v/v) and treatment ratio of 10 were achieved as the optimum conditions. At the optimum condition, the extraction of Nd(III) reached the maximum of 99.03%.

Keywords: Emulsion liquid membrane, extraction of neodymium, multi-walled carbon nanotubes, response surface method.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1129073

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References:


[1] T. Wannachod, P. Phuphaibul, V. Mohdee, U. Pancharoen, and S. Phatanasri, “Optimization of synergistic extraction of neodymium ions from monazite leach solution treatment via HFSLM using response surface methodology,” Miner. Eng., vol. 77, pp. 1–9, Jun. 2015.
[2] P. Maestro and D. Huguenin, “Industrial applications of rare earths: which way for the end of the century,” J. Alloys Compd., vol. 225, pp. 520–528, Jul. 1995.
[3] T. P. Rao and V. M. Biju, “Trace Determination of Lanthanides in Metallurgical, Environmental, and Geological Samples,” Crit. Rev. Anal. Chem., vol. 30, pp. 179–220, 2000.
[4] T. Wannachod, N. Leepipatpiboon, U. Pancharoen, and K. Nootong, “Synergistic effect of various neutral donors in D2EHPA for selective neodymium separation from lanthanide series via HFSLM,” J. Ind. Eng. Chem., vol. 20, pp. 4152–4162, 2014.
[5] D. Fontana and L. Pietrelli, “Separation of middle rare earths by solvent extraction using 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester as an extractant,” J. Rare Earths, vol. 27, pp. 830–833, Oct. 2009.
[6] D. Wu, Q. Zhang, and B. Bao, “Solvent extraction of Pr and Nd (III) from chloride-acetate medium by 8-hydroquinoline with and without 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester as an added synergist in heptane diluent,” Hydrometallurgy, vol. 88, pp. 210–215, Aug. 2007.
[7] F. Xie, T. A. Zhang, D. Dreisinger, and F. Doyle, “A critical review on solvent extraction of rare earths from aqueous solutions,” Miner. Eng., vol. 56, pp. 10–28, Feb. 2014.
[8] M.-S. Lee, J.-Y. Lee, J.-S. Kim, and G.-S. Lee, “Solvent extraction of neodymium ions from hydrochloric acid solution using PC88A and saponified PC88A,” Sep. Purif. Technol., vol. 46, pp. 72–78, Nov. 2005.
[9] M. Anitha, D. N. Ambare, M. K. Kotekar, D. K. Singh, and H. Singh, “Studies on Permeation of Nd (III) through Supported Liquid Membrane Using DNPPA + TOPO as Carrier,” Sep. Sci. Technol., vol. 48, pp. 2196–2203, 2013.
[10] S. Suren, T. Wongsawa, U. Pancharoen, T. Prapasawat, and A. W. Lothongkum, “Uphill transport and mathematical model of Pb(II) from dilute synthetic lead-containing solutions across hollow fiber supported liquid membrane,” Chem. Eng. J., vol. 191, pp. 503–511, May 2012.
[11] M. Anitha, D. N. Ambare, D. K. Singh, H. Singh, and P. K. Mohapatra, “Extraction of neodymium from nitric acid feed solutions using an emulsion liquid membrane containing TOPO and DNPPA as the carrier extractants,” Chem. Eng. Res. Des., vol. 98, pp. 89–95, Jun. 2015.
[12] N. M. Kocherginsky, Q. Yang, and L. Seelam, “Recent advances in supported liquid membrane technology,” Sep. Purif. Technol., vol. 53, pp. 171–177, Feb. 2007.
[13] L. Zhang, Q. Chen, C. Kang, X. Ma, and Z. Yang, “Rare earth extraction from wet process phosphoric acid by emulsion liquid membrane,” J. Rare Earths, vol. 34, pp. 717–723, Jul. 2016.
[14] T. Kakoi, T. Ura, H. Kasaini, M. Goto, and F. Nakashio, “Separation of Cobalt and Nickel by Liquid Surfactant Membranes Containing a Synthesized Cationic Surfactant,” Sep. Sci. Technol., vol. 33, pp. 1163–1180, Jan. 1998.
[15] A. K. Ghoshal and P. Saha, “Liquid – Membrane Filters,” in Progress in Filtration and Separation: Fundamentals and Core Principles, 2015, pp. 155–205.
[16] R. a. Kumbasar and O. Tutkun, “Selective Separation of Gallium from Acidic Leach Solutions by Emulsion Liquid Membranes,” Sep. Sci. Technol., vol. 41, pp. 2825–2847, Sep. 2006.
[17] M. Chakraborty, C. Bhattacharya, and S. Datta, “Emulsion Liquid Membranes,” in Liquid Membranes, 1st ed., Elsevier, 2010, pp. 141–199.
[18] B. P. Binks, A. Desforges, and D. G. Duff, “Synergistic Stabilization of Emulsions by a Mixture of Surface-Active Nanoparticles and Surfactant,” Langmuir, vol. 23, pp. 1098–1106, Jan. 2007.