Integrated bioleaching-electrometallurgy for copper recovery - A critical review

Brar, Kamalpreet Kaur; Magdouli, Sara; Etteieb, Selma; Zolfaghari, Mehdi; Fathollahzadeh, Homayoun; Călugăru, L.; Komtchou, Simon-Pierre; Tanabene, Rayen; Brar, Satinder Kaur

doi:10.1016/j.jclepro.2020.125257

Cited by 33 publications

(17 citation statements)

References 118 publications

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“…Therefore, AMD is a dangerous industrial byproduct, highly acidic and rich in sulfates [2]. The recycling of this secondary waste may reduce environmental risks, as well as increase the economic profitability of the mining industry [3]. In any case, while mine waste piles accumulate, AMD is continuously formed, and this affects industrial environments well after closure of mining activities.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Characteristics of Acid Mine Drainage Treated with Fly Ash

et al. 2021

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Acid mine drainage (AMD) occurs naturally in abandoned coal mines, and it contains hazardous toxic elements in varying concentrations. In the present research, AMD samples collected from an abandoned mine were treated with fly ash samples from four thermal power plants in Singrauli Coalfield in the proximate area, at optimized concentrations. The AMD samples were analyzed for physicochemical parameters and metal content before and after fly ash treatment. Morphological, geochemical and mineralogical characterization of the fly ash was performed using SEM, XRF and XRD. This laboratory-scale investigation indicated that fly ash had appreciable neutralization potential, increasing AMD pH and decreasing elemental and sulfate concentrations. Therefore, fly ash may be effectively used for AMD neutralization, and its suitability for the management of coalfield AMD pits should be assessed further.

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Section: Introductionmentioning

confidence: 99%

Assessment of Characteristics of Acid Mine Drainage Treated with Fly Ash

et al. 2021

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“…The efficiency of this process depends on various factors, such as the use of pH separators (membranes), presence/absence of oxygen, and initial copper concentration ( Heijne et al, 2010 ; Tao et al, 2011a , b ; Motos et al, 2015 ; Miran et al, 2017 ). Given that Cu was cycling from solid state (PCB) to the solution and precipitated back to the anodic biofilm, the microbial communities enriched in our well plate exhibit a combination of oxidative and reductive bioleaching ( Brar et al, 2021 ), which may also indicate the fluctuations in the current densities ( Figure 1D ).…”

Section: Discussionmentioning

confidence: 99%

Novel species identification and deep functional annotation of electrogenic biofilms, selectively enriched in a microbial fuel cell array

et al. 2022

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In this study, electrogenic microbial communities originating from a single source were multiplied using our custom-made, 96-well-plate-based microbial fuel cell (MFC) array. Developed communities operated under different pH conditions and produced currents up to 19.4 A/m3 (0.6 A/m2) within 2 days of inoculation. Microscopic observations [combined scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS)] revealed that some species present in the anodic biofilm adsorbed copper on their surface because of the bioleaching of the printed circuit board (PCB), yielding Cu2 + ions up to 600 mg/L. Beta- diversity indicates taxonomic divergence among all communities, but functional clustering is based on reactor pH. Annotated metagenomes showed the high presence of multicopper oxidases and Cu-resistance genes, as well as genes encoding aliphatic and aromatic hydrocarbon-degrading enzymes, corresponding to PCB bioleaching. Metagenome analysis revealed a high abundance of Dietzia spp., previously characterized in MFCs, which did not grow at pH 4. Binning metagenomes allowed us to identify novel species, one belonging to Actinotalea, not yet associated with electrogenicity and enriched only in the pH 7 anode. Furthermore, we identified 854 unique protein-coding genes in Actinotalea that lacked sequence homology with other metagenomes. The function of some genes was predicted with high accuracy through deep functional residue identification (DeepFRI), with several of these genes potentially related to electrogenic capacity. Our results demonstrate the feasibility of using MFC arrays for the enrichment of functional electrogenic microbial consortia and data mining for the comparative analysis of either consortia or their members.

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“…Then, biosorption occurs, which involves phenomena like complexation, ion exchange, chelation or coordination involving microorganisms that include fungi, algae or yeasts. 12,16,17 Other than the three main methods mentioned above, other techniques are slowly gaining momentum, such as the use of supercritical CO 2 , cryomilling, different chelation technologies or employing ILs. 12,18 In addition to the obvious economic impact of recovering metals from waste sources, as addressed before, metal removal and separation can be a very important aspect for human health and safety as well as environmental aspects.…”

Section: Ziwen Yuanmentioning

confidence: 99%

“…Then, biosorption occurs, which involves phenomena like complexation, ion exchange, chelation or coordination involving microorganisms that include fungi, algae or yeasts. 12,16,17…”

Section: Introductionmentioning

confidence: 99%