Selective separation of Fe and Ga from Al-containing HNO3 leach liquor using cupferron: Efficiency, mechanism, and regeneration

Shi, Shuyang; Ma, Baozhong; Yang, Hui; Chen, Yongqiang; Wang, Chengyan

doi:10.1016/j.cej.2024.151178

Chemical Engineering Journal

2024

DOI: 10.1016/j.cej.2024.151178

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Selective separation of Fe and Ga from Al-containing HNO3 leach liquor using cupferron: Efficiency, mechanism, and regeneration

Shuyang Shi,

Baozhong Ma,

Hui Yang

et al.

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2024

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Cited by 2 publications

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Review on Gallium in Coal and Coal Waste Materials: Exploring Strategies for Hydrometallurgical Metal Recovery

Rudnik

2024

Molecules

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Gallium, a critical and strategic material for advanced technologies, is anomalously enriched in certain coal deposits and coal by-products. Recovering gallium from solid residues generated during coal production and utilization can yield economic benefits and positive environmental gains through more efficient waste processing. This systematic literature review focuses on gallium concentrations in coal and its combustion or gasification by-products, modes of occurrence, gallium-hosting phases, and hydrometallurgical recovery methods, including pretreatment procedures that facilitate metal release from inert aluminosilicate minerals. Coal gangue, and especially fly ashes from coal combustion and gasification, are particularly promising due to their higher gallium content and recovery rates, which can exceed 90% under optimal conditions. However, the low concentrations of gallium and the high levels of impurities in the leachates require innovative and selective separation techniques, primarily involving ion exchange and adsorption. The scientific literature review revealed that coal, bottom ash, and coarse slag have not yet been evaluated for gallium recovery, even though the wastes can contain higher gallium levels than the original material.

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Review on Gallium in Coal and Coal Waste Materials: Exploring Strategies for Hydrometallurgical Metal Recovery

Rudnik

2024

Molecules

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Recovery of Lesser-Known Strategic Metals: The Gallium and Germanium Cases

Robla,

Alonso,

Alguacil

2024

Processes

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Being not as popular as other elements, such as cobalt, lithium, and rare earth elements, both gallium and germanium have wide use in target developments/industries, thus making them valuable and strategically critical metals. The principal sources for the recovery of both metals are secondary wastes of the bauxite (gallium) or zinc (germanium) industries; also, their recycling from waste materials is necessary. The characteristics of these materials make hydrometallurgical operations widely useful in recovering both gallium and germanium from the various sources containing them. The present work reviews the most recent applications (in 2024) of the various operations applied to the recovery of gallium or germanium from various resources.

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Selective separation of Fe and Ga from Al-containing HNO3 leach liquor using cupferron: Efficiency, mechanism, and regeneration

Cited by 2 publications

References 47 publications

Review on Gallium in Coal and Coal Waste Materials: Exploring Strategies for Hydrometallurgical Metal Recovery

Review on Gallium in Coal and Coal Waste Materials: Exploring Strategies for Hydrometallurgical Metal Recovery

Recovery of Lesser-Known Strategic Metals: The Gallium and Germanium Cases

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