Mechanisms of biological recovery of rare-earth elements from industrial and electronic wastes: A review

Dev, Subhabrata; Sachan, Ankur; Dehghani, Fahimeh; Ghosh, Tathagata; Briggs, Brandon R.; Aggarwal, Srijan

doi:10.1016/j.cej.2020.124596

Cited by 145 publications

(81 citation statements)

References 188 publications

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“…Rare earth (RE) elements have widely been used in diverse industry materials such as magnets, fluorescent lamps, catalysts, and batteries [ 1 , 2 , 3 , 4 , 5 ]. Lanthanide (Ln) elements are commonly co-present with actinide (An) elements in nuclear oxide fuels.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Recovery and Behaviors of Rare Earth (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb) Ions on Ni Sheets

et al. 2020

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The electrochemical behaviors of rare earth (RE) ions have extensively been studied because of their high potential applications to the reprocessing of used nuclear fuels and RE-containing materials. In the present study, we fully investigated the electrochemical behaviors of RE(III) (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb) ions over a Ni sheet electrode in 0.1 M NaClO4 electrolyte solution by cyclic voltammetry between +0.5 and −1.5 V (vs. Ag/AgCl). Amperometry electrodeposition experiments were performed between −1.2 and −0.9 V to recover RE elements over the Ni sheet. The successfully RE-recovered Ni sheets were fully characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and photoluminescence spectroscopy. The newly reported recovery data for RE(III) ions over a metal electrode provide valuable information on the development of the treatment methods of RE elements.

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Section: Introductionmentioning

confidence: 99%

Electrochemical Recovery and Behaviors of Rare Earth (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb) Ions on Ni Sheets

et al. 2020

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“…Bioleaching processes can be performed by autotrophic or heterotrophic microorganisms and the selection of the latter depends on the type of the bearing mineral. Heterotrophic microorganisms have mostly been reported in the literature for REE extraction via bioleaching and includes the production of organic acids and metal-binding molecules [88]. The organic acids, namely oxalic, gluconic, acetic, citric, formic and malic acids decrease the pH allowing the leaching of REE while the metal-binding molecules act as chelating agent for separation of the targeted molecule out of the solution [61,87,89].…”

Section: Bioleachingmentioning

confidence: 99%

Rare Earths’ Recovery from Phosphogypsum: An Overview on Direct and Indirect Leaching Techniques

et al. 2021

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The need for rare earths elements (REEs) in high tech electrical and electronic based materials are vital. In the global economy, deposits of natural REEs are limited except for countries such as China, which has prompted current attempts to seek alternative resources of REEs. This increased the dependence on major secondary rare earth-bearing sources such as scrap alloy, battery waste, spent catalysts, fly ash, spent magnets, waste light-emitting diodes (LEDs), and phosphogypsum (PG) for a substantial recovery of REEs for use. Recycling of REEs from these alternative waste sources through hydrometallurgical processes is becoming a sustainable and viable approach due to the low energy consumption, low waste generation, few emissions, environmentally friendliness, and economically feasibility. Industrial wastes such as the PG generated from the production of phosphoric acid is a potential secondary resource of REEs that contains a total REE concentration of over 2000 mg/kg depending upon the phosphate ore from which it is generated. Due to trace concentration of REEs in the PG (normally < 0.1% wt.) and their tiny and complex occurrence as mineral phases the recovery process of REE from PG would be highly challenging in both technology and economy. Various physicochemical pre-treatments approaches have been used up to date to up-concentrate REEs from PG prior to their extraction. Methods such as carbonation, roasting, microwave heating, grinding or recrystallization have been widely used for this purpose. This present paper reviews recent literature on various techniques that are currently employed to up-concentrate REs from PG to provide preliminary insight into further critical raw materials recovery. In addition, the advantages and disadvantages of the different strategies are discussed as avenues for realization of REE recovery from PG at a larger scale. In all the different approaches, recrystallization of PG appears to show promising advantages due to both high REE recovery as well as the pure PG phase that can be obtained.

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“…[ 617,689,690 ] There is consequently potential for greener manufacture processes which produce less toxic materials and by‐products that have promise in medical and technical applications (e.g., biosensors, [ 691 ] printing [ 692–697 ] ), especially given that OEs are comparatively lightweight and flexible. [ 617,620,690 ] Further research into OEs has the potential to reduce environmental impacts by adoption of renewable resources and green processes, thereby effectively managing the amount of e‐waste generated annually (currently ≈50 million tonnes); [ 640,698–703 ] and health impacts by use of the technologies for medical applications. OE development is not without challenges [ 704–706 ] and requires a market demand to be articulated [ 707,708 ] to create scalability and realize the potential economic and environmental benefits.…”

Section: Melanins For a Sustainable Futurementioning

confidence: 99%

Melanins as Sustainable Resources for Advanced Biotechnological Applications

et al. 2020

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Melanins are a class of biopolymers that are widespread in nature and have diverse origins, chemical compositions, and functions. Their chemical, electrical, optical, and paramagnetic properties offer opportunities for applications in materials science, particularly for medical and technical uses. This review focuses on the application of analytical techniques to study melanins in multidisciplinary contexts with a view to their use as sustainable resources for advanced biotechnological applications, and how these may facilitate the achievement of the United Nations Sustainable Development Goals.

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Mechanisms of biological recovery of rare-earth elements from industrial and electronic wastes: A review

Cited by 145 publications

References 188 publications

Electrochemical Recovery and Behaviors of Rare Earth (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb) Ions on Ni Sheets

Electrochemical Recovery and Behaviors of Rare Earth (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb) Ions on Ni Sheets

Rare Earths’ Recovery from Phosphogypsum: An Overview on Direct and Indirect Leaching Techniques

Melanins as Sustainable Resources for Advanced Biotechnological Applications

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