Green extraction of nickel and valuable metals from pyrrhotite samples with different crystallographic structures through acidophilic bioleaching

Khodadadmahmoudi, Gholamreza; Abdollahi, Hadi; Mohammadzadeh, Amirhossein; Saneie, Roozbeh; Mirmohammadi, Mirsaleh; Rezaei, Ali; Jozanikohan, Golnaz; Naderi, Hojat

doi:10.1016/j.jenvman.2022.115394

Cited by 10 publications

(4 citation statements)

References 42 publications

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“…The results indicate that the leaching rates of Fe and Ni in nickel smelting slag are limited by the diffusion of the product layer. According to previous studies, diffusion control is explained by the possibility of passivating the formation of sulfur layers . This concept is further confirmed by the discovery of sulfur elemental and polysulfide in leaching slag.…”

Section: Resultsmentioning

confidence: 54%

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A New Method and Mechanism of Oxidation/Ammonia Leaching-Phosphoric Acid Synergistic Regulation of Nickel Smelting Slag for Graded High-Value Recovery of Iron and Nickel

Wu,

Meng,

Chen

et al. 2024

ACS EST Eng.

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Nickel smelting slag contains high-grade iron and nickel and represents a valuable secondary resource, yet it is often relegated to disposal. Hydrothermal leaching is a prevalent technique for recovering valuable metals from nickel smelting slag. Due to the limited research on the process mechanism, the leaching effectiveness of iron and other valuable metals remains low. Typically the leaching solution is used mainly to recover nickel, with iron being discarded as an impurity, resulting in significant losses of target metal in the iron-rich solution. This paper introduces novel techniques for the synergistic regulation of cascade high-value recovery of iron−nickel from ammonia oxide leaching and phosphoric acid from nickel smelting slag, achieving efficient leaching of iron−nickel and the production of high-purity iron phosphate and a nickel-enriched solution. The mechanism of gradual leaching and nickel-amine stabilization of the key phases of nickel smelting slag controlled by diffusion under the action of ammonium persulfate was elucidated. The separation of iron and nickel in iron-rich solution was achieved by using different phosphate K sp . Homogeneous 1 μm spherical FePO 4 and nickel enrichment solution were synthesized. Also, the key control strategies of the process were outlined. This study provides a feasible approach for the resource utilization of solid waste from nonferrous metal smelting, especially the metal extraction, separation, and high-value utilization of iron-rich polymetallic waste residue.

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Section: Resultsmentioning

confidence: 54%

“…According to previous studies, diffusion control is explained by the possibility of passivating the formation of sulfur layers. 37 This concept is further confirmed by the discovery of sulfur elemental and polysulfide in leaching slag.…”

Section: Analysis Of Key Phases and Elements In Nickel Smeltingmentioning

confidence: 86%

A New Method and Mechanism of Oxidation/Ammonia Leaching-Phosphoric Acid Synergistic Regulation of Nickel Smelting Slag for Graded High-Value Recovery of Iron and Nickel

Wu,

Meng,

Chen

et al. 2024

ACS EST Eng.

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“…In contrast, biohydrometallurgy brings added value to these processes, as they can recover quantities of metals using aqueous solutions and biological metabolites produced by certain microorganisms [17]; bioleaching, for example, is considered one of the green technologies for metal recovery, offering low cost in terms of installation and operation, low energy consumption, no toxic waste generation and low capital investment [1,[18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Bioleaching Techniques for Sustainable Recovery of Metals from Solid Matrices

et al. 2023

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This review paper explores the potential of bioleaching as a sustainable alternative for recovering metals from solid matrices. With over 12 billion tons of solid waste annually worldwide, bioleaching provides a promising opportunity to extract metals from solid waste, avoiding harmful chemical processes. It explains bacterial and fungal bioleaching techniques that extract copper, gold, zinc, and other metals from solid matrices. Fungal bioleaching effectively extracts a wide range of valuable metals, including nickel, vanadium, aluminium, molybdenum, cobalt, iron, manganese, silver, platinum, and palladium. The review highlights different solid matrices with metal contents that have the potential to be recovered by bioleaching, presenting promising bioprocess alternatives to current industrially available technologies for metal recovery. The optimal conditions for bioleaching, including pH, temperature, agitation–aeration, and pulp density are also discussed. The review shows that bioleaching has the potential to play a crucial role in the transition to a more sustainable and circular economy by providing an efficient, cost-effective, and environmentally friendly method for metal recovery from solid matrices.

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“…In natural environments, Co frequently replaces Fe in pyrrhotite owing to its a nity for sulfur and similar ionic radius to iron (Dehaine et al 2021, Savinova et al 2023. Various genetic types of pyrrhotite contain Co as an example of this phenomenon (Dehaine et al 2021, Khodadadmahmoudi et al 2022. Therefore, we predict that Co isomorphism replacing FeS may serve as a highly reactive, stable, and recyclable catalyst for PMS activation.…”

mentioning

confidence: 98%

Enhanced efficiency of refractory organic pollutant degradation over a wide pH range by peroxymonosulfate activated by cobalt-doped FeS

Pan,

Zhang,

Zhou

et al. 2024

Applied Geochemistry

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Green extraction of nickel and valuable metals from pyrrhotite samples with different crystallographic structures through acidophilic bioleaching

Cited by 10 publications

References 42 publications

A New Method and Mechanism of Oxidation/Ammonia Leaching-Phosphoric Acid Synergistic Regulation of Nickel Smelting Slag for Graded High-Value Recovery of Iron and Nickel

A New Method and Mechanism of Oxidation/Ammonia Leaching-Phosphoric Acid Synergistic Regulation of Nickel Smelting Slag for Graded High-Value Recovery of Iron and Nickel

Bioleaching Techniques for Sustainable Recovery of Metals from Solid Matrices

Enhanced efficiency of refractory organic pollutant degradation over a wide pH range by peroxymonosulfate activated by cobalt-doped FeS

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