Review on the environment friendly leaching of rare earth elements from the secondary resources using organic acids

Banerjee, Riya; Chakladar, Saswati; Mohanty, Ashok; Chakravarty, Sanchita; Chattopadhyay, Shyamal Kumar; Jha, Manis Kumar

doi:10.1080/12269328.2022.2135139

Cited by 6 publications

(2 citation statements)

References 98 publications

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“…In contrast, only 5% Al, 2% Si, and 6% Fe were leached by tartaric acid, showing its high selectivity towards REEs; the different complexation ability of metals with tartaric acids may be a reason for this. Similarly, organosulphonic acids leached 70% of REEs but only 10% of other metals from coal ash [60]. These findings provide clues for the screening of microorganisms capable of bioleaching, as microbes capable of producing these target organic acids are likely to be effective in REE extraction.…”

Section: Coal-related Resourcesmentioning

confidence: 85%

“…Gypsum is the main (70%) REE-bearing phase, while some REEs also occur in monazite and apatite [46]. Inorganic acids release 80%-90% of REEs from phosphogypsum, and organic acids, especially citric acid, can solubilize 60%-80% of REEs [60,61]. The performance of this bioleaching approach is comparable to organic acids and even inorganic acids, involving bacteria Gluconobacter oxydans, At.…”

Section: Phosphogypsummentioning

confidence: 99%

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Bioleaching of Rare Earth Elements: Perspectives from Mineral Characteristics and Microbial Species

Shi,

Pan,

Dong

et al. 2023

Minerals

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Bioleaching exhibits high potential for the processing of low-grade complex mineral resources. With the development of the economy and an increase in demand, rare earth elements (REEs) in secondary resources, such as phosphogypsum, red mud and coal-related resources, are gaining more and more attention. In this review, the bioleaching performance of diverse microorganisms is summarized and compared for primary (mainly monazite) and secondary REE resources, based on publications from the past decade. The mineral characteristics of these REE resources are different, as they can be found in phosphate, sulfate, or silicate forms. Correspondingly, microbial species suitable for use in bioleaching differ. The most efficient bioleaching microbe for monazite is Paecilomyces sp., while Acidianus manzaensis is effective in processing red mud. Acidophilic sulfur oxidizers are suitable for processing acidic phosphogypsum. Acidithiobacillus thiooxidans could recover a significant amount of REEs from coal fly ash. In particular, monazite has a high REE content but extremely low bioleaching efficiency compared to that of secondary resources, supporting the understanding that bioleaching approaches are more competitive for minerals with low REE contents. Overall, great progress has been made over the last decade, as considerable REE recovery rates have been achieved, and the main metabolites of microbes were identified. However, numerous challenges still exist. Future efforts should focus on improving biorecovery efficiency, reducing the cost of cell-culture media, and exploring the interaction mechanism between cells and minerals, with an emphasis on mineralogical phase transformations and the molecular regulation mechanisms inside cells during the bioleaching process.

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Section: Coal-related Resourcesmentioning

confidence: 85%

Section: Phosphogypsummentioning

confidence: 99%

Bioleaching of Rare Earth Elements: Perspectives from Mineral Characteristics and Microbial Species

Shi,

Pan,

Dong

et al. 2023

Minerals

View full text Add to dashboard Cite

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Emerging Rare Earth Element Separation Technologies

Pramanik,

Kaur,

Popovs

et al. 2024

Eur J Inorg Chem

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Rare earth elements are essential for numerous clean energy applications, yet their mining, separation, and processing pose significant environmental challenges. Traditional separation processes often result in ecological damage, highlighting the critical need for innovative techniques that reduce environmental impacts. This article reviews recent advancements in rare earth separation technologies, with a particular focus on the role of neutral organic compounds. It explores how these compounds change selectivity across the rare earth series, offering promising strategies for designing more effective rare earth element separation systems. Furthermore, the article points out research areas requiring additional investigation to improve the sustainability of these critical processes.

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A comparative study on the association and extractability of rare earth elements from laboratory ash, bottom ash, fly ash: A perspective on Indian coals

Banerjee,

Chakladar,

Chattopadhyay

et al. 2024

Minerals Engineering

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Review on the environment friendly leaching of rare earth elements from the secondary resources using organic acids

Cited by 6 publications

References 98 publications

Bioleaching of Rare Earth Elements: Perspectives from Mineral Characteristics and Microbial Species

Bioleaching of Rare Earth Elements: Perspectives from Mineral Characteristics and Microbial Species

Emerging Rare Earth Element Separation Technologies

A comparative study on the association and extractability of rare earth elements from laboratory ash, bottom ash, fly ash: A perspective on Indian coals

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