Extraction of Al and rare earths (Ce, Gd, Sc, Y) from red mud by aerobic and anaerobic bi-stage bioleaching

Zhang, Duo-rui; Chen, Hongrui; Nie, Zuoren; Xia, Jin-lan; Li, Er‐Ping; Fan, Xiaolu; Zheng, Lei

doi:10.1016/j.cej.2020.125914

Cited by 68 publications

(24 citation statements)

References 64 publications

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“…Al and rare earths elements have been extracted from red mud by a two-step aerobic and anaerobic bioleaching approach. Acidianus manzaensis anaerobically dissolved jarosites via Fe(III) reduction coupled to sulfur oxidation (Zhang et al 2020a , b ). Also demonstrated has been a reductive dissolution of jarosite by the heterotrophic bacterium Acidiphilium cryptum (e.g., González et al 2020 ).…”

Section: Acid and Reductive Bioleaching Of Laterite Oresmentioning

confidence: 99%

Progress in bioleaching: part B, applications of microbial processes by the minerals industries

Roberto

Schippers

2022

Appl Microbiol Biotechnol

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This review provides an update to the last mini-review with the same title pertaining to recent developments in bioleaching and biooxidation published in 2013 (Brierley and Brierley). In the intervening almost 10 years, microbial processes for sulfide minerals have seen increased acceptance and ongoing but also declining commercial application in copper, gold, nickel and cobalt production. These processes have been applied to heap and tank leaching, nowadays termed biomining, but increasing concerns about the social acceptance of mining has also seen the re-emergence of in situ leaching and quest for broader applicability beyond uranium and copper. Besides metal sulfide oxidation, mineral dissolution via reductive microbial activities has seen experimental application to laterite minerals. And as resources decline or costs for their exploitation rise, mine waste rock and tailings have become more attractive to consider as easily accessible resources. As an advantage, they have already been removed from the ground and in some cases contain ore grades exceeding that of those currently being mined. These factors promote concepts of circular economy and efficient use and valorization of waste materials. Key points • Bioleaching of copper sulfide ore deposits is producing less copper today • Biooxidation of refractory gold ores is producing more gold than in the past • Available data suggest bioleaching and biooxidation processes reduce carbon emissions

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Section: Acid and Reductive Bioleaching Of Laterite Oresmentioning

confidence: 99%

Progress in bioleaching: part B, applications of microbial processes by the minerals industries

Roberto

Schippers

2022

Appl Microbiol Biotechnol

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“…Out of all these techniques, bioleaching and microbial electrochemistry are among the most-studied methods (Dominguez-Benetton et al, 2018;Srichandan et al, 2019). In bauxite residues, these techniques are still at an early experimentation stage, although some promising results for REE recovery by bioleaching have been reported (Kiskira et al, 2021;Qu et al, 2019;Zhang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Contrasted microbial community colonization of a bauxite residue deposit marked by a complex geochemical context

Macías-Pérez

Levard

Barakat

et al. 2022

Journal of Hazardous Materials

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“…Hydrometallurgy uses strong acids (and/or other harsh chemicals) to solubilize metals, while bioleaching with acidophilic chemolithotrophs uses biogenic H 2 SO 4 generated via sulfur (S 0 ) bio-oxidation (Brierley and Brierley, 2013 ; Marrero et al, 2015 ; Pakostova and Johnson, 2019 ; Zhang et al, 2020 ). Bioleaching of metals from RM represents a suitable alternative to the conventional approaches, minimizing the usage of concentrated acids and generation of potentially hazardous wastes, while simultaneously reducing the negative impacts of RM on the environment and human health.…”

Section: Introductionmentioning

confidence: 99%

Efficient dealkalization of red mud and recovery of valuable metals by a sulfur-oxidizing bacterium

et al. 2022

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Red mud (RM) is a highly alkaline polymetallic waste generated via the Bayer process during alumina production. It contains metals that are critical for a sustainable development of modern society. Due to a shortage of global resources of many metals, efficient large-scale processing of RM has been receiving increasing attention from both researchers and industry. This study investigated the solubilization of metals from RM, together with RM dealkalization, via sulfur (S0) oxidation catalyzed by the moderately thermophilic bacterium Sulfobacillus thermosulfidooxidans. Optimization of the bioleaching process was conducted in shake flasks and 5-L bioreactors, with varying S0:RM mass ratios and aeration rates. The ICP analysis was used to monitor the concentrations of dissolved elements from RM, and solid residues were analyzed for surface morphology, phase composition, and Na distribution using the SEM, XRD, and STXM techniques, respectively. The results show that highest metal recoveries (89% of Al, 84% of Ce, and 91% of Y) were achieved with the S0:RM mass ratio of 2:1 and aeration rate of 1 L/min. Additionally, effective dealkalization of RM was achieved under the above conditions, based on the high rates (>95%) of Na, K, and Ca dissolution. This study proves the feasibility of using bacterially catalyzed S0 oxidation to simultaneously dealkalize RM and efficiently extract valuable metals from the amassing industrial waste.

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Extraction of Al and rare earths (Ce, Gd, Sc, Y) from red mud by aerobic and anaerobic bi-stage bioleaching

Cited by 68 publications

References 64 publications

Progress in bioleaching: part B, applications of microbial processes by the minerals industries

Progress in bioleaching: part B, applications of microbial processes by the minerals industries

Contrasted microbial community colonization of a bauxite residue deposit marked by a complex geochemical context

Efficient dealkalization of red mud and recovery of valuable metals by a sulfur-oxidizing bacterium

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