Abstract
Rare earth elements (REEs) are among the strategic materials that have revolutionized modern industry. These materials have unique properties, so they are essential to the production of many technologically advanced products that are dominating the world; thus the REEs demand is continuously rising. To address this challenge, finding new sources for them is highly of interest. Here, we identified a waste stream from phosphoric acid production plants, called phosphogypsum, which contains some amounts of REEs. We developed a novel hydrometallurgical process to recover REEs from phosphogypsum. We investigated several leaching agents at various conditions and identified the optimum leaching parameters. Not only can the developed process decrease the size and associated environmental risks with the existing phosphogypsum stacks, but also can slow down the need for additional stacks. In addition to waste valorization, this novel process provides a new source for REEs production, addressing the sustainability challenges associated with them.
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References
N.E. Topp, The Chemistry of The Rare Earth Elements, Elsevier, Amsterdam, 1965.
D.J. Fray, Separating rare earth elements, Science 289 (2000) 2295–2296.
M. Humphries, Rare earth elements: the global supply chain, Congressional Research Service Report, R41347, 2013, pp. 3.
B. Mishra, A. Anderson, Extraction and recovery of rare-earth metals: challenges in processing, in: ERES 2014, 1st European Rare Earth Resources Conference, Greece, 2014, pp. 19–25.
U.S. Department of Energy, Critical Materials Strategy, 2011, pp. 113–120.
Report on critical raw materials for the EU, (Report of the Working Group on defining critical raw materials), 2014.
P.M. Rutherford, M.J. Dudas, J.M. Arocena, Radioactivity and elemental composition of phosphogypsum from three phosphate rock sources, Waste Manage. Res. 13 (1995) 407–423.
S.M. Luther, M.J. Dudas, P.M. Rutherford, Radioactivity and chemical characteristics of Alberta phosphogypsum, Water Air Soil Pollut. 69 (1993) 277–290.
M.E. Jackson, Assessment of Soil capping for phosphogypsum stack reclamation at Fort Saskatchewan, Alberta, University of Alberta, Edmonton, 2009.
B.I. Pålsson, O. Martinsson, C. Wanhainen, A. Fredriksson, Unlocking rare earth elements from European apatite-iron ores, in: ERES2014, 1st European Rare Earth Resources Conference, Milos Island, Greece, 2014, pp. 211–220.
F. Habashi, The recovery of the lanthanides from phosphate rock, J. Chem. Tech. Biothechnol. 35A (1985) 5–14.
G. Azimi, V.G. Papangelakis, J.E. Dutrizac, Modeling of calcium sulfate solubility in concentrated multi-component sulfate solutions, Fluid Phase Equilib. 260 (2007) 300–315.
G. Azimi, V.G. Papangelakis, J.E. Dutrizac, Development of an MSE-based chemical model for the solubility of calcium sulfate in mixed chloride–sulfate solutions, Fluid Phase Equilib. 266 (2008) 172–186.
G. Azimi, V.G. Papangelakis, Mechanism and kinetics of gypsum-anhydrite transformation in aqueous electrolyte solutions, Hydrometallurgy 108 (2011) 122–129.
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Walawalkar, M., Nichol, C.K., Azimi, G. (2016). Sustainable Processing of Phosphogypsum Waste Stream for the Recovery of Valuable Rare Earth Elements. In: Kirchain, R.E., et al. REWAS 2016. Springer, Cham. https://doi.org/10.1007/978-3-319-48768-7_16
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DOI: https://doi.org/10.1007/978-3-319-48768-7_16
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48618-5
Online ISBN: 978-3-319-48768-7
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