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Dysprosium sorption by polymeric composite bead: Robust parametric optimization using Taguchi method
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DOI：10.1016/j.chroma.2015.01.061.png)
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Polyethersulfone-based beads encapsulating di-2-ethylhexyl phosphoric acid have been synthesized and evaluated for the recovery of rare earth values from the aqueous media. Percentage recovery and the sorption behavior of Dy(III) have been investigated under wide range of experimental parameters using these beads. Taguchi method utilizing L-18 orthogonal array has been adopted to identify the most influential process parameters responsible for higher degree of recovery with enhanced sorption of Dy(III) from chloride medium. Analysis of variance indicated that the feed concentration of Dy(III) is the most influential factor for equilibrium sorption capacity, whereas aqueous phase acidity influences the percentage recovery most. The presence of polyvinyl alcohol and multiwalled carbon nanotube modified the internal structure of the composite beads and resulted in uniform distribution of organic extractant inside polymeric matrix. The experiment performed under optimum process conditions as predicted by Taguchi method resulted in enhanced Dy(III) recovery and sorption capacity by polymeric beads with minimum standard deviation. (C) 2015 Elsevier B.V. All rights reserved.
Keyword:
Solvent impregnated polymeric bead
Taguchi method
Rare earth
Equilibrium sorption
D2EHPA
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4
论文数:
3.2W
被引数:
5.0W
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