TY - JOUR
T1 - Bio- and mineral acid leaching of rare earth elements from synthetic phosphogypsum
AU - Antonick, Paul J.
AU - Hu, Zhichao
AU - Fujita, Yoshiko
AU - Reed, David W.
AU - Das, Gaurav
AU - Wu, Lili
AU - Shivaramaiah, Radha
AU - Kim, Paul
AU - Eslamimanesh, Ali
AU - Lencka, Malgorzata M.
AU - Jiao, Yongqin
AU - Anderko, Andrzej
AU - Navrotsky, Alexandra
AU - Riman, Richard E.
N1 - Funding Information:
This research was supported by the Critical Materials Institute, an Energy Innovation Hub funded by the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office, and conducted under Rutgers Contracts SC-13-394-436163 and SC-18-475-123975, DOE Idaho Operations Office Contract DE-AC07-05ID14517, and Lawrence Livermore National Laboratory Contract DE-AC52-07NA27344. Accordingly, the U.S. Government retains a nonexclusive, royalty-free license to publish or reproduce the published form of this contribution, and allow others to do so, for U.S. Government purposes.
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/5
Y1 - 2019/5
N2 - Leaching of six individual rare earth (yttrium, cerium, neodymium, samarium, europium, and ytterbium) doped synthetic phosphogypsum samples using a suite of lixiviants was conducted. The lixiviants chosen for this study were phosphoric acid, sulfuric acid, gluconic acid, and a “biolixiviant” consisting of spent medium containing organic acids from the growth of the bacterium Gluconobacter oxydans on glucose. The biolixiviant had a pH of 2.1 and the dominant organic acid was determined to be gluconic acid, present at a concentration of 220 mM. The leaching behaviors of the studied lixiviants were compared and rationalized by thermodynamic simulations. The results suggest that at equivalent molar concentrations of 220 mM the biolixiviant was more efficient at rare earth element (REE) extraction than gluconic acid and phosphoric acid but less efficient than sulfuric acid. Unlike the organic acids, at pH 2.1 the mineral acids failed to extract REE, likely due to different complexation and kinetic effects.
AB - Leaching of six individual rare earth (yttrium, cerium, neodymium, samarium, europium, and ytterbium) doped synthetic phosphogypsum samples using a suite of lixiviants was conducted. The lixiviants chosen for this study were phosphoric acid, sulfuric acid, gluconic acid, and a “biolixiviant” consisting of spent medium containing organic acids from the growth of the bacterium Gluconobacter oxydans on glucose. The biolixiviant had a pH of 2.1 and the dominant organic acid was determined to be gluconic acid, present at a concentration of 220 mM. The leaching behaviors of the studied lixiviants were compared and rationalized by thermodynamic simulations. The results suggest that at equivalent molar concentrations of 220 mM the biolixiviant was more efficient at rare earth element (REE) extraction than gluconic acid and phosphoric acid but less efficient than sulfuric acid. Unlike the organic acids, at pH 2.1 the mineral acids failed to extract REE, likely due to different complexation and kinetic effects.
KW - Biohydrometallurgy
KW - Bioleaching
KW - Mineral acid leaching
KW - Rare earth recovery
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U2 - 10.1016/j.jct.2018.12.034
DO - 10.1016/j.jct.2018.12.034
M3 - Article
AN - SCOPUS:85059690298
SN - 0021-9614
VL - 132
SP - 491
EP - 496
JO - Journal of Chemical Thermodynamics
JF - Journal of Chemical Thermodynamics
ER -