Microbial biominers: Sequential bioleaching and biouptake of metals from electronic scraps

Camino García‐balboa; Paloma Martínez‐alesón García; Victoria López‐rodas; Eduardo Costas; Beatriz Baselga‐cervera

doi:10.1002/mbo3.1265

Microbial biominers: Sequential bioleaching and biouptake of metals from electronic scraps

Camino García‐balboa, Paloma Martínez‐alesón García, Victoria López‐rodas, Eduardo Costas, Beatriz Baselga‐cervera

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Abstract

Electronic scraps (e-scraps) represent an attractive raw material to mine demanded metals, as well as rare earth elements (REEs). A sequential microbial-mediated process developed in two steps was examined to recover multiple elements. First, we made use of an acidophilic bacteria consortium, mainly composed of Acidiphilium multivorum and Leptospidillum ferriphilum, isolated from acid mine drainages. The consortium was inoculated in a dissolution of e-scraps powder and cultured for 15 days. Forty-five elements were analyzed in the liquid phase over time, including silver, gold, and 15 REEs. The bioleaching efficiencies of the consortium were >99% for Cu, Co, Al, and Zn, 53% for Cd, and around 10% for Cr and Li on Day 7. The second step consisted of a microalgae-mediated uptake from e-scraps leachate. The strains used were two acidophilic extremotolerant microalgae, Euglena sp. (EugVP) and Chlamydomonas sp. (ChlSG) strains, isolated from the same extreme environment. Up to 7.3, 4.1, 1.3, and 0.7 µg by wet biomass (WB) of Zn, Al, Cu, and Mn, respectively, were uptaken by ChlSG biomass in 12 days, presenting higher efficiency than EugVP. Concerning REEs, ChlSG biouptake 14.9, 20.3, 13.7, 8.3 ng of Gd, Pr, Ce, La per WB. Meanwhile, EugVP captured 1.1, 1.5, 1.4, and 7.5, respectively. This paper shows the potential of a microbial sequential process to revalorize e-scraps and recover metals and REEs, harnessing extremotolerant microorganisms.

Original language	English (US)
Article number	e1265
Journal	MicrobiologyOpen
Volume	11
Issue number	1
DOIs	https://doi.org/10.1002/mbo3.1265
State	Published - Feb 1 2022

Bibliographical note

Funding Information:
This work was supported by the Fundación Alfonso Martín Escudero Postdoctoral Grant (number 2048) awarded to B.B.C. Authors want to acknowledge the analytical services of the Centro Analítico Integral (CAI), geological techniques research support center of the Complutense University of Madrid for their support in the chemical and SEM analyses. We acknowledge the company LYRSA‐Derichebourg for the support of the present research as the supplier of the scrap material from their production process.

Funding Information:
This work was supported by the Fundaci?n Alfonso Mart?n Escudero Postdoctoral Grant (number 2048) awarded to B.B.C. Authors want to acknowledge the analytical services of the Centro Anal?tico Integral (CAI), geological techniques research support center of the Complutense University of Madrid for their support in the chemical and SEM analyses. We acknowledge the company LYRSA-Derichebourg for the support of the present research as the supplier of the scrap material from their production process.

Publisher Copyright:
© 2022 The Authors. MicrobiologyOpen published by John Wiley & Sons Ltd.

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Supplemental Data; "Microbial biominers: sequential bioleaching and biouptake of metals from e-scraps"
García-Balboa, C., Martínez-Alesón García, P., López-Rodas, V., Costas, E. & Baselga-Cervera, B., ZENODO, 2022
DOI: 10.5281/zenodo.5819061, https://zenodo.org/record/5819061
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Cite this

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title = "Microbial biominers: Sequential bioleaching and biouptake of metals from electronic scraps",

abstract = "Electronic scraps (e-scraps) represent an attractive raw material to mine demanded metals, as well as rare earth elements (REEs). A sequential microbial-mediated process developed in two steps was examined to recover multiple elements. First, we made use of an acidophilic bacteria consortium, mainly composed of Acidiphilium multivorum and Leptospidillum ferriphilum, isolated from acid mine drainages. The consortium was inoculated in a dissolution of e-scraps powder and cultured for 15 days. Forty-five elements were analyzed in the liquid phase over time, including silver, gold, and 15 REEs. The bioleaching efficiencies of the consortium were >99% for Cu, Co, Al, and Zn, 53% for Cd, and around 10% for Cr and Li on Day 7. The second step consisted of a microalgae-mediated uptake from e-scraps leachate. The strains used were two acidophilic extremotolerant microalgae, Euglena sp. (EugVP) and Chlamydomonas sp. (ChlSG) strains, isolated from the same extreme environment. Up to 7.3, 4.1, 1.3, and 0.7 µg by wet biomass (WB) of Zn, Al, Cu, and Mn, respectively, were uptaken by ChlSG biomass in 12 days, presenting higher efficiency than EugVP. Concerning REEs, ChlSG biouptake 14.9, 20.3, 13.7, 8.3 ng of Gd, Pr, Ce, La per WB. Meanwhile, EugVP captured 1.1, 1.5, 1.4, and 7.5, respectively. This paper shows the potential of a microbial sequential process to revalorize e-scraps and recover metals and REEs, harnessing extremotolerant microorganisms.",

author = "Camino Garc{\'i}a‐balboa and {Mart{\'i}nez‐ales{\'o}n Garc{\'i}a}, Paloma and Victoria L{\'o}pez‐rodas and Eduardo Costas and Beatriz Baselga‐cervera",

note = "Funding Information: This work was supported by the Fundaci{\'o}n Alfonso Mart{\'i}n Escudero Postdoctoral Grant (number 2048) awarded to B.B.C. Authors want to acknowledge the analytical services of the Centro Anal{\'i}tico Integral (CAI), geological techniques research support center of the Complutense University of Madrid for their support in the chemical and SEM analyses. We acknowledge the company LYRSA‐Derichebourg for the support of the present research as the supplier of the scrap material from their production process. Funding Information: This work was supported by the Fundaci?n Alfonso Mart?n Escudero Postdoctoral Grant (number 2048) awarded to B.B.C. Authors want to acknowledge the analytical services of the Centro Anal?tico Integral (CAI), geological techniques research support center of the Complutense University of Madrid for their support in the chemical and SEM analyses. We acknowledge the company LYRSA-Derichebourg for the support of the present research as the supplier of the scrap material from their production process. Publisher Copyright: {\textcopyright} 2022 The Authors. MicrobiologyOpen published by John Wiley & Sons Ltd.",

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AU - García‐balboa, Camino

AU - Martínez‐alesón García, Paloma

AU - López‐rodas, Victoria

AU - Costas, Eduardo

AU - Baselga‐cervera, Beatriz

N1 - Funding Information: This work was supported by the Fundación Alfonso Martín Escudero Postdoctoral Grant (number 2048) awarded to B.B.C. Authors want to acknowledge the analytical services of the Centro Analítico Integral (CAI), geological techniques research support center of the Complutense University of Madrid for their support in the chemical and SEM analyses. We acknowledge the company LYRSA‐Derichebourg for the support of the present research as the supplier of the scrap material from their production process. Funding Information: This work was supported by the Fundaci?n Alfonso Mart?n Escudero Postdoctoral Grant (number 2048) awarded to B.B.C. Authors want to acknowledge the analytical services of the Centro Anal?tico Integral (CAI), geological techniques research support center of the Complutense University of Madrid for their support in the chemical and SEM analyses. We acknowledge the company LYRSA-Derichebourg for the support of the present research as the supplier of the scrap material from their production process. Publisher Copyright: © 2022 The Authors. MicrobiologyOpen published by John Wiley & Sons Ltd.

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N2 - Electronic scraps (e-scraps) represent an attractive raw material to mine demanded metals, as well as rare earth elements (REEs). A sequential microbial-mediated process developed in two steps was examined to recover multiple elements. First, we made use of an acidophilic bacteria consortium, mainly composed of Acidiphilium multivorum and Leptospidillum ferriphilum, isolated from acid mine drainages. The consortium was inoculated in a dissolution of e-scraps powder and cultured for 15 days. Forty-five elements were analyzed in the liquid phase over time, including silver, gold, and 15 REEs. The bioleaching efficiencies of the consortium were >99% for Cu, Co, Al, and Zn, 53% for Cd, and around 10% for Cr and Li on Day 7. The second step consisted of a microalgae-mediated uptake from e-scraps leachate. The strains used were two acidophilic extremotolerant microalgae, Euglena sp. (EugVP) and Chlamydomonas sp. (ChlSG) strains, isolated from the same extreme environment. Up to 7.3, 4.1, 1.3, and 0.7 µg by wet biomass (WB) of Zn, Al, Cu, and Mn, respectively, were uptaken by ChlSG biomass in 12 days, presenting higher efficiency than EugVP. Concerning REEs, ChlSG biouptake 14.9, 20.3, 13.7, 8.3 ng of Gd, Pr, Ce, La per WB. Meanwhile, EugVP captured 1.1, 1.5, 1.4, and 7.5, respectively. This paper shows the potential of a microbial sequential process to revalorize e-scraps and recover metals and REEs, harnessing extremotolerant microorganisms.

AB - Electronic scraps (e-scraps) represent an attractive raw material to mine demanded metals, as well as rare earth elements (REEs). A sequential microbial-mediated process developed in two steps was examined to recover multiple elements. First, we made use of an acidophilic bacteria consortium, mainly composed of Acidiphilium multivorum and Leptospidillum ferriphilum, isolated from acid mine drainages. The consortium was inoculated in a dissolution of e-scraps powder and cultured for 15 days. Forty-five elements were analyzed in the liquid phase over time, including silver, gold, and 15 REEs. The bioleaching efficiencies of the consortium were >99% for Cu, Co, Al, and Zn, 53% for Cd, and around 10% for Cr and Li on Day 7. The second step consisted of a microalgae-mediated uptake from e-scraps leachate. The strains used were two acidophilic extremotolerant microalgae, Euglena sp. (EugVP) and Chlamydomonas sp. (ChlSG) strains, isolated from the same extreme environment. Up to 7.3, 4.1, 1.3, and 0.7 µg by wet biomass (WB) of Zn, Al, Cu, and Mn, respectively, were uptaken by ChlSG biomass in 12 days, presenting higher efficiency than EugVP. Concerning REEs, ChlSG biouptake 14.9, 20.3, 13.7, 8.3 ng of Gd, Pr, Ce, La per WB. Meanwhile, EugVP captured 1.1, 1.5, 1.4, and 7.5, respectively. This paper shows the potential of a microbial sequential process to revalorize e-scraps and recover metals and REEs, harnessing extremotolerant microorganisms.

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DO - 10.1002/mbo3.1265

M3 - Article

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JO - MicrobiologyOpen

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M1 - e1265

ER -

Microbial biominers: Sequential bioleaching and biouptake of metals from electronic scraps

Abstract

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Supplemental Data; "Microbial biominers: sequential bioleaching and biouptake of metals from e-scraps"

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