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  1. Application of hydrophobic superparamagnetic nanoparticles in the solvent extraction of nickel aiming to accelerate phase disengagement
Application of hydrophobic superparamagnetic nanoparticles in the solvent extraction of nickel aiming to accelerate phase disengagement
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Application of hydrophobic superparamagnetic nanoparticles in the solvent extraction of nickel aiming to accelerate phase disengagement

Firouzi, F

Application of hydrophobic superparamagnetic nanoparticles in the solvent extraction of nickel aiming to accelerate phase disengagement

Firouzi, F ; Sharif University of Technology | 2024

14 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.colsurfa.2024.134927
  3. Publisher: 2024
  4. Abstract:
  5. This study investigated the application of a magnetic organic phase containing hydrophobic superparamagnetic nanoparticles to accelerate phase disengagement in solvent extraction processes. For this purpose, stearate-modified magnetite nanoparticles were prepared, characterized, and dispersed in 20 vol.% D2EHPA extractant diluted in kerosene to obtain the intended organic phase. The magnetic solvent extraction process of nickel was conducted using the as-prepared magnetic organic phase containing varying concentrations of hydrophobic magnetite nanoparticles in a sulfate medium. The results implied significant decrements of up to four times in the aqueous/organic phase disengagement duration in an external magnetic field with 10 g.L−1 nanoparticles determined as the optimum concentration. Such magnetically accelerated separation was revealed to be the result of colliding and coalescing the size-heterogeneous magnetic organic droplets moving unevenly through the continuous aqueous solution in a separating system. It is also worth mentioning that applying magnetic solvent extraction did not affect the equilibrium extraction behavior of nickel by D2EHPA. © 2024 Elsevier B.V
  6. Keywords:
  7. Flocculation ; Hydrophobicity ; Nanomagnetics ; Nickel ; Solvent extraction ; Solvents ; Sulfur compounds ; Superparamagnetism ; Magnetite nanoparticle ; Solvent ; D2EHPA ; Extractants ; Hydrophobic magnetite ; Hydrophobics ; Magnetic solvent extraction ; Organic phase ; Solvent-extraction process ; Sulfate media ; Superparamagnetic nanoparticles ; Aqueous solution ; Chemical phenomena ; Fourier transform infrared spectroscopy ; Magnetic field ; Microscopy ; Phase disengagement ; Magnetite
  8. Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects ; Volume 701 , 2024 ; 09277757 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0927775724017916