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Effective recovery of Ti as anatase nanoparticles from waste red mud via a coupled leaching and boiling route

Red mud (RM) a solid waste generated by the bauxite smelting industry, is a rich source of metal resources, especially Ti, and its recycling can bring significant environmental and economic benefits. In this study, precious metal Ti was efficiently recovered from red mud using a coupled acid leachin...

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Autores principales: Qu, Zhan, Liu, Jiancong, Su, Ting, Zhu, Suiyi, Liu, Junzhen, Chen, Yusen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10232845/
https://www.ncbi.nlm.nih.gov/pubmed/37273511
http://dx.doi.org/10.3389/fchem.2023.1201390
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author Qu, Zhan
Liu, Jiancong
Su, Ting
Zhu, Suiyi
Liu, Junzhen
Chen, Yusen
author_facet Qu, Zhan
Liu, Jiancong
Su, Ting
Zhu, Suiyi
Liu, Junzhen
Chen, Yusen
author_sort Qu, Zhan
collection PubMed
description Red mud (RM) a solid waste generated by the bauxite smelting industry, is a rich source of metal resources, especially Ti, and its recycling can bring significant environmental and economic benefits. In this study, precious metal Ti was efficiently recovered from red mud using a coupled acid leaching and boiling route for the effective separation of low-value metals. The red mud which contained mainly 10.69% Si, 12.1% Al, 15.2% Ca, 10.99% Fe, and 4.37% Ti, was recovered in five steps. First, a nitric acid solution was used to leach the metals in multiple stages, resulting in an acidic leach solution with high concentrations of Fe, Al, Ti, and Ca ions 2.7 g/L, 4.7 g/L, 5.43 g/L, and 1.8 g/L, respectively. Then, a small amount of sucrose was added as a catalyst to recover Ti from the leach solution under hydrothermal conditions, resulting in the targeted recovery of 98.6% of Ti in the form of high-purity anatase while Fe, Al, and Ca remained in the solution. Next, the Fe in solution was separated as hematite products at a temperature of 110°C and a reaction time of 4 h. Similarly, the Al in the solution was separated and precipitated as boehmite by heating it at 260°C for a reaction time of 20 h. Finally, the remaining Ca in solution was recovered by simple pH regulation. Economic accounting assessment showed that the method yields $101.06 for 1 t of red mud treated, excluding labor costs. This study provides a novel approach to recover precious metals from metal wastes through the whole process resource recovery of solid waste red mud.
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spelling pubmed-102328452023-06-02 Effective recovery of Ti as anatase nanoparticles from waste red mud via a coupled leaching and boiling route Qu, Zhan Liu, Jiancong Su, Ting Zhu, Suiyi Liu, Junzhen Chen, Yusen Front Chem Chemistry Red mud (RM) a solid waste generated by the bauxite smelting industry, is a rich source of metal resources, especially Ti, and its recycling can bring significant environmental and economic benefits. In this study, precious metal Ti was efficiently recovered from red mud using a coupled acid leaching and boiling route for the effective separation of low-value metals. The red mud which contained mainly 10.69% Si, 12.1% Al, 15.2% Ca, 10.99% Fe, and 4.37% Ti, was recovered in five steps. First, a nitric acid solution was used to leach the metals in multiple stages, resulting in an acidic leach solution with high concentrations of Fe, Al, Ti, and Ca ions 2.7 g/L, 4.7 g/L, 5.43 g/L, and 1.8 g/L, respectively. Then, a small amount of sucrose was added as a catalyst to recover Ti from the leach solution under hydrothermal conditions, resulting in the targeted recovery of 98.6% of Ti in the form of high-purity anatase while Fe, Al, and Ca remained in the solution. Next, the Fe in solution was separated as hematite products at a temperature of 110°C and a reaction time of 4 h. Similarly, the Al in the solution was separated and precipitated as boehmite by heating it at 260°C for a reaction time of 20 h. Finally, the remaining Ca in solution was recovered by simple pH regulation. Economic accounting assessment showed that the method yields $101.06 for 1 t of red mud treated, excluding labor costs. This study provides a novel approach to recover precious metals from metal wastes through the whole process resource recovery of solid waste red mud. Frontiers Media S.A. 2023-05-18 /pmc/articles/PMC10232845/ /pubmed/37273511 http://dx.doi.org/10.3389/fchem.2023.1201390 Text en Copyright © 2023 Qu, Liu, Su, Zhu, Liu and Chen. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Qu, Zhan
Liu, Jiancong
Su, Ting
Zhu, Suiyi
Liu, Junzhen
Chen, Yusen
Effective recovery of Ti as anatase nanoparticles from waste red mud via a coupled leaching and boiling route
title Effective recovery of Ti as anatase nanoparticles from waste red mud via a coupled leaching and boiling route
title_full Effective recovery of Ti as anatase nanoparticles from waste red mud via a coupled leaching and boiling route
title_fullStr Effective recovery of Ti as anatase nanoparticles from waste red mud via a coupled leaching and boiling route
title_full_unstemmed Effective recovery of Ti as anatase nanoparticles from waste red mud via a coupled leaching and boiling route
title_short Effective recovery of Ti as anatase nanoparticles from waste red mud via a coupled leaching and boiling route
title_sort effective recovery of ti as anatase nanoparticles from waste red mud via a coupled leaching and boiling route
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10232845/
https://www.ncbi.nlm.nih.gov/pubmed/37273511
http://dx.doi.org/10.3389/fchem.2023.1201390
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