Hydro metallurgical technique as better option for the recovery of rare earths from mine tailings and industrial wastes

Ray, Aditya Ranjan; Mishra, Sujata

doi:10.1016/j.scp.2023.101311

Cited by 12 publications

(4 citation statements)

References 131 publications

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“…Following this heat treatment, the processed material is subjected to alkali activation using an alkaline solution. Alkaline fusion can facilitate the removal of impurities or unwanted components from the tailings, making them more suitable for specific applications [146].…”

Section: Alkaline Fusionmentioning

confidence: 99%

A Comprehensive Review on Mine Tailings as a Raw Material in the Alkali Activation Process

Manaviparast,

Miranda,

Pereira

et al. 2024

Applied Sciences

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The mining industry generates vast quantities of mine tailings on an annual basis. However, due to their limited economic value, a significant portion of these tailings are deposited close to mining sites, often underwater. The principal environmental apprehensions associated with mine tailings revolve around their elevated levels of heavy metals and sulfidic minerals. The oxidation of these sulfidic minerals can lead to the formation of acid mine drainage, which in turn releases heavy metals into nearby water systems. The effective management of tailing dams requires substantial financial investments for their construction and meticulous control. Consequently, a pressing need exists for stable, sustainable, and economically viable management approaches. One promising method for addressing mine tailings is through alkali activation, a technique that serves as a stabilization process. This approach yields robust, concrete-like structures by utilizing raw materials abundant in aluminum and silicon, which conveniently constitute the primary components of mining residues. This comprehensive review outlines the research on utilizing alkali activation for mine tailings. It delves into the reactivity and chemical attributes of diverse minerals. Numerous mine tailings exhibit an inadequate level of reactivity under alkaline conditions, so various pre-treatment methodologies and their impacts on mineralogy are meticulously explored.

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Section: Alkaline Fusionmentioning

confidence: 99%

A Comprehensive Review on Mine Tailings as a Raw Material in the Alkali Activation Process

Manaviparast,

Miranda,

Pereira

et al. 2024

Applied Sciences

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“…Due to its operational characteristics (using low temperatures, the possibility of operating under pressure conditions, treatment of materials with low metal concentrations, the possibility of purification of complex materials and solutions, etc. ), hydrometallurgy can be a major key for the recovery and purification of these strategic metals [ 4 ]. However, several environmental issues tend to consider traditional hydrometallurgy less environmentally friendly than the use of solvometallurgy in recovering valuable metals.…”

Section: Introductionmentioning

confidence: 99%

Utilizing Deep Eutectic Solvents in the Recycle, Recovery, Purification and Miscellaneous Uses of Rare Earth Elements

Alguacil

2024

Molecules

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The boosted interest in using rare earth elements (REEs) in modern technologies has also increased the necessity of their recovery from various sources, including raw materials and wastes. Though hydrometallurgy plays a key role in these recovery processes, some drawbacks (apparent or not) of these processes (including the use of aggressive mineral acids, harmful extractants, and diluents, etc.) have led to the development of an environmental friendship subclass named solvometallurgy, in which non-aqueous solvents substituted to the aqueous media of the hydrometallurgical processing. Together with ionic liquids (ILs), the non-aqueous solvents chosen for these usages are the chemicals known as deep eutectic solvents (DEEs). The utilization of DEEs included the leaching of REEs from the different sources containing them and also in the separation-purification steps necessary for yielding these elements, normally oxides or salts, in the most purified form. This work reviewed the most recent literature (2023 year) about using deep eutectic solvents to recover REEs from various sources and coupling these two (DESs and REEs) to derive compounds to be used in other fields.

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“…Sc, which is estimated to have 70-80% of world reserves in bauxites, is far more economically valuable than the rest present in BR REEs [4]. Environmental analyses of hydrometallurgical processes that induce higher flexibility, reduced energy consumption, and other aspects stimulate the development of technologies based upon them [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…The obtained PLS is traditionally characterized by a high salt background, high acidity (pH < 2), and a low concentration of Sc. In order to concentrate the element and separate it from lixiviants, the most established methods such as ion exchange or solvent extraction are applied [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Selective Recovery of Scandium (Sc) from Sulfate Solution of Bauxite Residue Leaching Using Puromet MTS9580 Ion-Exchange Sorption

Napol’skikh,

Shoppert,

Loginova

et al. 2024

Metals

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Rare earth elements (REEs) and Sc are concentrated in aluminum production byproducts. The novel REEs recovery approach, which involves leaching with acid at a pH > 3 in the presence of MgSO4, results in the formation of a pregnant leach solution (PLS) with a low concentration of iron (Fe) and titanium (Ti) and a large number of valuable elements. This work studies the application of chelating resin Puromet МТS9580 in the sorption recovery of Sc from sulfate solutions. To analyze the static Sc sorption data, Langmuir, Freundlich, and Temkin isotherm models were used. The Langmuir isotherm model was the best fitted to the experimental data, with a coefficient of determination (R2) of 0.983. The dynamic adsorption experiment was conducted using a PLS and a simulated solution without contaminants. Adsorption of Sc from the simulated solution was better fitted to the Thomas model with a Sc capacity greater than 6.4 mg mL−1. Because Ti had a gradual decrease in C/C0, which the Thomas model was unable to simulate, the modified dose-response (MDR) model fitted better with PLS with a Sc capacity greater than 3.8 mg mL−1. The NaHCO3 solution (200 g L−1) effectively desorbed Sc (>98%) from simulated and PLS solutions after 1.5 h of stirring in a batch mode. After 1.5 h of desorption, the concentration of Sc in the desorption solution was 461.5 mg L−1, while the concentration of Mg and Ti was lower than 200 mg L−1 and 50 mg L−1, respectively.

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Hydro metallurgical technique as better option for the recovery of rare earths from mine tailings and industrial wastes

Cited by 12 publications

References 131 publications

A Comprehensive Review on Mine Tailings as a Raw Material in the Alkali Activation Process

A Comprehensive Review on Mine Tailings as a Raw Material in the Alkali Activation Process

Utilizing Deep Eutectic Solvents in the Recycle, Recovery, Purification and Miscellaneous Uses of Rare Earth Elements

Selective Recovery of Scandium (Sc) from Sulfate Solution of Bauxite Residue Leaching Using Puromet MTS9580 Ion-Exchange Sorption

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