Open Access
Materials, volume 15, issue 4, pages 1343
High-Selective Extraction of Scandium (Sc) from Bauxite Residue (Red Mud) by Acid Leaching with MgSO4
Publication type: Journal Article
Publication date: 2022-02-11
PubMed ID:
35207883
General Materials Science
Abstract
Bauxite residue, also known as red mud (RM), from alumina production is the most promising technogenic material for the production of scandium (Sc) and other rare earth elements (REEs). Conveniently, RM is processed by using a strong acid (pH < 2.5), which lead to co-dissolution of iron and other undesirable major components. In this work, for the first time, the possibility of selective extraction of scandium from red mud by using highly diluted acid (pH > 4) in the presence of MgSO4 was shown. The effect of temperature (40–80 °C), time (0–60 min), pH (2–5), and the MgSO4 concentration (12–36 g L−1) on Sc extraction efficiency was evaluated. It was shown that Sc extraction was higher than 63% even at a pH of 4, at 80 °C, after 1 h, while more than 80% could be extracted at a pH of 2. Iron extraction reduced from 7.7 to 0.03% by increasing the pH from 2 to 4. The kinetics study using the shrinking core model (SCM) has shown that diffusion through a product layer is a rate-limiting stage of the process at high temperatures (>60 °C) and low pH (<3), whereas, at lower temperatures and higher pH values, the leaching rate is limited by diffusion through the liquid film.
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Materials
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Materials
4 publications, 66.67%
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Sustainability
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Sustainability
1 publication, 16.67%
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Metals
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Metals
1 publication, 16.67%
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Citations by publishers
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Multidisciplinary Digital Publishing Institute (MDPI)
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Multidisciplinary Digital Publishing Institute (MDPI)
6 publications, 100%
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Shoppert A. et al. High-Selective Extraction of Scandium (Sc) from Bauxite Residue (Red Mud) by Acid Leaching with MgSO4 // Materials. 2022. Vol. 15. No. 4. p. 1343.
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Shoppert A., Loginova I., Napolskikh J., Valeev D. High-Selective Extraction of Scandium (Sc) from Bauxite Residue (Red Mud) by Acid Leaching with MgSO4 // Materials. 2022. Vol. 15. No. 4. p. 1343.
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TY - JOUR
DO - 10.3390/ma15041343
UR - https://doi.org/10.3390%2Fma15041343
TI - High-Selective Extraction of Scandium (Sc) from Bauxite Residue (Red Mud) by Acid Leaching with MgSO4
T2 - Materials
AU - Napolskikh, Julia
AU - Loginova, Irina
AU - Shoppert, Andrei
AU - Valeev, Dmitry
PY - 2022
DA - 2022/02/11 00:00:00
PB - Multidisciplinary Digital Publishing Institute (MDPI)
SP - 1343
IS - 4
VL - 15
PMID - 35207883
SN - 1996-1944
ER -
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@article{2022_Shoppert,
author = {Julia Napolskikh and Irina Loginova and Andrei Shoppert and Dmitry Valeev},
title = {High-Selective Extraction of Scandium (Sc) from Bauxite Residue (Red Mud) by Acid Leaching with MgSO4},
journal = {Materials},
year = {2022},
volume = {15},
publisher = {Multidisciplinary Digital Publishing Institute (MDPI)},
month = {feb},
url = {https://doi.org/10.3390%2Fma15041343},
number = {4},
pages = {1343},
doi = {10.3390/ma15041343}
}
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MLA
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Shoppert, Andrei, et al. “High-Selective Extraction of Scandium (Sc) from Bauxite Residue (Red Mud) by Acid Leaching with MgSO4.” Materials, vol. 15, no. 4, Feb. 2022, p. 1343. https://doi.org/10.3390%2Fma15041343.
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