Selective adsorption of rare earth elements onto functionalized silica particles

Jonathan C. Callura, Kedar M. Perkins, Clinton W. Noack, Newell R. Washburn, David A. Dzombak, Athanasios K. Karamalidis

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Rare earth elements (REE) are essential components of equipment used for renewable energy, green technologies, and more traditional sectors such as chemical catalysis and metallurgy. Interest has been growing in alternative REE sources to supplement current ore sources and related refining, which have historically supplied the bulk of REE oxides. This study investigated the capability of adsorbent silica particles functionalized with three different ligands-phosphonoacetic acid (PAA), N,N-bisphosphono(methyl)glycine (BPG), and diethylenetriaminepentaacetic dianhydride (DTPADA)-to selectively extract REE from acidic to circumneutral aqueous brine solutions in equilibrium conditions. Maximum REE removal from 0.5 M NaCl solutions was displayed at pH 7 for PAA, pH 2 for DTPADA, and in both acidic and basic conditions for BPG functionalized materials. The REE adsorption performance for functionalized materials was largely unimpeded by the presence of competing ions (Ca, Mg, Zn, Fe, Al). Tests with real brines (I ∼ 3 M) showed >90% efficiency in REE recovery, which improved at higher temperatures (up to 100 °C). Effective elution of REE was accomplished with 0.7 N HNO3, and performance of the adsorbents improved with additional usage cycles.

Original languageEnglish (US)
Pages (from-to)1515-1526
Number of pages12
JournalGreen Chemistry
Volume20
Issue number7
DOIs
StatePublished - Jan 1 2018

Fingerprint

Rare earth elements
Silicon Dioxide
rare earth element
silica
Silica
adsorption
Adsorption
Phosphonoacetic Acid
Adsorbents
Environmental technology
Brines
Acids
particle
acid
catalysis
Metallurgy
metallurgy
Glycine
Oxides
Catalysis

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Pollution

Cite this

Callura, J. C., Perkins, K. M., Noack, C. W., Washburn, N. R., Dzombak, D. A., & Karamalidis, A. K. (2018). Selective adsorption of rare earth elements onto functionalized silica particles. Green Chemistry, 20(7), 1515-1526. https://doi.org/10.1039/c8gc00051d
Callura, Jonathan C. ; Perkins, Kedar M. ; Noack, Clinton W. ; Washburn, Newell R. ; Dzombak, David A. ; Karamalidis, Athanasios K. / Selective adsorption of rare earth elements onto functionalized silica particles. In: Green Chemistry. 2018 ; Vol. 20, No. 7. pp. 1515-1526.
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Callura, JC, Perkins, KM, Noack, CW, Washburn, NR, Dzombak, DA & Karamalidis, AK 2018, 'Selective adsorption of rare earth elements onto functionalized silica particles', Green Chemistry, vol. 20, no. 7, pp. 1515-1526. https://doi.org/10.1039/c8gc00051d

Selective adsorption of rare earth elements onto functionalized silica particles. / Callura, Jonathan C.; Perkins, Kedar M.; Noack, Clinton W.; Washburn, Newell R.; Dzombak, David A.; Karamalidis, Athanasios K.

In: Green Chemistry, Vol. 20, No. 7, 01.01.2018, p. 1515-1526.

Research output: Contribution to journalArticle

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