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Title: Selective recovery of rare earth elements with ligand-functionalized polymers in fixed-bed adsorption columns

Abstract

Rare earth elements (REE) are a group of valuable metals with growing demand and broad applications. Mineral ores, the traditional sources of REE, require significant capital investment and their refinement has been a source of environmental contamination. Industrial fluids and natural REE-bearing liquids are potential alternative sources for these metals. This work investigated the performance and REE selectivity of polymer resin beads functionalized with N,N-bis(phosponomethyl)glycine (BPG) for extraction of REE from saline solutions in fixed-bed adsorption columns. Competitive batch adsorption experiments were conducted with various metals (Nd, Gd, Ho, Al, Fe, Co, Ni, Ba, Pb, Th, and U) and the BPG-functionalized resins were up to 137 times more selective for REE than aminated resins. In column experiments, the BPG-functionalized resins preferentially adsorbed heavier metals and REE were strongly retained in the functionalized column, taking 270 times longer than the amine column to reach 10% breakthrough and 128 times longer to reach 50% breakthrough. REE bound to the BPG-functionalized resins were recovered with a dilute HNO3 solution, yielding REE concentrations up to 236 times higher than the influent feedstock. This work provides new insight into the operational performance of novel functionalized adsorbents for recovery of REE from saline fluids.

Authors:
 [1];  [2];  [1];  [3]
  1. Carnegie Mellon Univ., Pittsburgh, PA (United States). Dept. of Civil and Environmental Engineering
  2. Carnegie Mellon Univ., Pittsburgh, PA (United States). Dept. of Civil and Environmental Engineering; Univ. of California, Riverside, CA (United States). Dept. of Environmental Sciences
  3. Carnegie Mellon Univ., Pittsburgh, PA (United States). Dept. of Civil and Environmental Engineering; Pennsylvania State Univ., University Park, PA (United States). Dept. of Energy and Mineral Engineering
Publication Date:
Research Org.:
Carnegie Mellon Univ., Pittsburgh, PA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1848444
Grant/Contract Number:  
EE0006749; DGE0966227
Resource Type:
Accepted Manuscript
Journal Name:
Separation and Purification Technology
Additional Journal Information:
Journal Volume: 265; Journal Issue: C; Journal ID: ISSN 1383-5866
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 42 ENGINEERING; Engineering; Rare earth elements; Selective adsorption; Lanthanides; Functionalization; Metal separations; Fixed-bed column; Chelation; Ligands; Bisphosphonate; Extraction

Citation Formats

Callura, Jonathan C., Shi, Qingyang, Dzombak, David A., and Karamalidis, Athanasios K. Selective recovery of rare earth elements with ligand-functionalized polymers in fixed-bed adsorption columns. United States: N. p., 2021. Web. doi:10.1016/j.seppur.2021.118472.
Callura, Jonathan C., Shi, Qingyang, Dzombak, David A., & Karamalidis, Athanasios K. Selective recovery of rare earth elements with ligand-functionalized polymers in fixed-bed adsorption columns. United States. https://doi.org/10.1016/j.seppur.2021.118472
Callura, Jonathan C., Shi, Qingyang, Dzombak, David A., and Karamalidis, Athanasios K. Sat . "Selective recovery of rare earth elements with ligand-functionalized polymers in fixed-bed adsorption columns". United States. https://doi.org/10.1016/j.seppur.2021.118472. https://www.osti.gov/servlets/purl/1848444.
@article{osti_1848444,
title = {Selective recovery of rare earth elements with ligand-functionalized polymers in fixed-bed adsorption columns},
author = {Callura, Jonathan C. and Shi, Qingyang and Dzombak, David A. and Karamalidis, Athanasios K.},
abstractNote = {Rare earth elements (REE) are a group of valuable metals with growing demand and broad applications. Mineral ores, the traditional sources of REE, require significant capital investment and their refinement has been a source of environmental contamination. Industrial fluids and natural REE-bearing liquids are potential alternative sources for these metals. This work investigated the performance and REE selectivity of polymer resin beads functionalized with N,N-bis(phosponomethyl)glycine (BPG) for extraction of REE from saline solutions in fixed-bed adsorption columns. Competitive batch adsorption experiments were conducted with various metals (Nd, Gd, Ho, Al, Fe, Co, Ni, Ba, Pb, Th, and U) and the BPG-functionalized resins were up to 137 times more selective for REE than aminated resins. In column experiments, the BPG-functionalized resins preferentially adsorbed heavier metals and REE were strongly retained in the functionalized column, taking 270 times longer than the amine column to reach 10% breakthrough and 128 times longer to reach 50% breakthrough. REE bound to the BPG-functionalized resins were recovered with a dilute HNO3 solution, yielding REE concentrations up to 236 times higher than the influent feedstock. This work provides new insight into the operational performance of novel functionalized adsorbents for recovery of REE from saline fluids.},
doi = {10.1016/j.seppur.2021.118472},
journal = {Separation and Purification Technology},
number = C,
volume = 265,
place = {United States},
year = {Sat Feb 20 00:00:00 EST 2021},
month = {Sat Feb 20 00:00:00 EST 2021}
}

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