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Molecular and geochemical basis of microbially induced carbonate precipitation for treating acid mine drainage: The case of a novel Sporosarcina genomospecies from mine tailings

Microbially induced carbonate precipitation (MICP) immobilizes toxic metals and reduces their bioavailability in aqueous systems. However, its application in the treatment of acid mine drainage (AMD) is poorly understood. In this study, the genomes of Sporosarcina sp. UB5 and UB10 were sequenced. Ur...

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Published in:Journal of hazardous materials 2024-09, Vol.476, p.135005, Article 135005
Main Authors: Cuaxinque-Flores, Gustavo, Talavera-Mendoza, Oscar, Aguirre-Noyola, José Luis, Hernández-Flores, Giovanni, Martínez-Miranda, Verónica, Rosas-Guerrero, Víctor, Martínez-Romero, Esperanza
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creator Cuaxinque-Flores, Gustavo
Talavera-Mendoza, Oscar
Aguirre-Noyola, José Luis
Hernández-Flores, Giovanni
Martínez-Miranda, Verónica
Rosas-Guerrero, Víctor
Martínez-Romero, Esperanza
description Microbially induced carbonate precipitation (MICP) immobilizes toxic metals and reduces their bioavailability in aqueous systems. However, its application in the treatment of acid mine drainage (AMD) is poorly understood. In this study, the genomes of Sporosarcina sp. UB5 and UB10 were sequenced. Urease, carbonic anhydrases, and metal resistance genes were identified and enzymatic assays were performed for their validation. The geochemical mechanism of precipitation in AMD was elucidated through geo-mineralogical analysis. Sporosarcina sp. UB5 was shown to be a new genomospecies, with an average nucleotide identity
doi_str_mv 10.1016/j.jhazmat.2024.135005
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However, its application in the treatment of acid mine drainage (AMD) is poorly understood. In this study, the genomes of Sporosarcina sp. UB5 and UB10 were sequenced. Urease, carbonic anhydrases, and metal resistance genes were identified and enzymatic assays were performed for their validation. The geochemical mechanism of precipitation in AMD was elucidated through geo-mineralogical analysis. Sporosarcina sp. UB5 was shown to be a new genomospecies, with an average nucleotide identity &lt; 95 % (ANI) and DNA-DNA hybridization &lt; 70 % (DDH) whereas UB10 is close to S. pasteurii. UB5 contained two urease operons, whereas only one was identified in UB10. The ureolytic activities of UB5 and UB10 were 122.67 ± 15.74 and 131.70 ± 14.35 mM NH4+ min−1, respectively. Both strains feature several carbonic anhydrases of the α, β, or γ families, which catalyzed the precipitation of CaCO3. Only Sporosarcina sp. UB5 was able to immobilize metals and neutralize AMD. Geo-mineralogical analyses revealed that UB5 directly immobilized Fe (1–23 %), Mn (0.65–1.33 %) and Zn (0.8–3 %) in AMD via MICP and indirectly through adsorption to calcite and binding to bacterial cell walls. The MICP-treated AMD exhibited high removal rates (&gt;67 %) for Ag, Al, As, Ca, Cd, Co, Cu, Fe, Mn, Pb, and Zn, and a removal rate of 15 % for Mg. This study provides new insights into the MICP process and its applications to AMD treatment using autochthonous strains. [Display omitted] •Sporosarcina sp. UB5 is a new genomospecies, whereas UB10 is close to S. pasteurii clade.•Sporosarcina sp. UB5 and UB10 have urease operon and α, β and γ carbonic anhydrases.•Urease and carbonic anhydrase induce CaCO3 precipitation.•Sporosarcina sp. 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Geo-mineralogical analyses revealed that UB5 directly immobilized Fe (1–23 %), Mn (0.65–1.33 %) and Zn (0.8–3 %) in AMD via MICP and indirectly through adsorption to calcite and binding to bacterial cell walls. The MICP-treated AMD exhibited high removal rates (&gt;67 %) for Ag, Al, As, Ca, Cd, Co, Cu, Fe, Mn, Pb, and Zn, and a removal rate of 15 % for Mg. This study provides new insights into the MICP process and its applications to AMD treatment using autochthonous strains. [Display omitted] •Sporosarcina sp. UB5 is a new genomospecies, whereas UB10 is close to S. pasteurii clade.•Sporosarcina sp. UB5 and UB10 have urease operon and α, β and γ carbonic anhydrases.•Urease and carbonic anhydrase induce CaCO3 precipitation.•Sporosarcina sp. 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However, its application in the treatment of acid mine drainage (AMD) is poorly understood. In this study, the genomes of Sporosarcina sp. UB5 and UB10 were sequenced. Urease, carbonic anhydrases, and metal resistance genes were identified and enzymatic assays were performed for their validation. The geochemical mechanism of precipitation in AMD was elucidated through geo-mineralogical analysis. Sporosarcina sp. UB5 was shown to be a new genomospecies, with an average nucleotide identity &lt; 95 % (ANI) and DNA-DNA hybridization &lt; 70 % (DDH) whereas UB10 is close to S. pasteurii. UB5 contained two urease operons, whereas only one was identified in UB10. The ureolytic activities of UB5 and UB10 were 122.67 ± 15.74 and 131.70 ± 14.35 mM NH4+ min−1, respectively. Both strains feature several carbonic anhydrases of the α, β, or γ families, which catalyzed the precipitation of CaCO3. Only Sporosarcina sp. UB5 was able to immobilize metals and neutralize AMD. Geo-mineralogical analyses revealed that UB5 directly immobilized Fe (1–23 %), Mn (0.65–1.33 %) and Zn (0.8–3 %) in AMD via MICP and indirectly through adsorption to calcite and binding to bacterial cell walls. The MICP-treated AMD exhibited high removal rates (&gt;67 %) for Ag, Al, As, Ca, Cd, Co, Cu, Fe, Mn, Pb, and Zn, and a removal rate of 15 % for Mg. This study provides new insights into the MICP process and its applications to AMD treatment using autochthonous strains. [Display omitted] •Sporosarcina sp. UB5 is a new genomospecies, whereas UB10 is close to S. pasteurii clade.•Sporosarcina sp. UB5 and UB10 have urease operon and α, β and γ carbonic anhydrases.•Urease and carbonic anhydrase induce CaCO3 precipitation.•Sporosarcina sp. UB5 neutralizes AMD and precipitates Fe, Mn and Zn as carbonates.•The cell wall of UB5 contains ligands for metal binding and mineral nucleation.</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>38996684</pmid><doi>10.1016/j.jhazmat.2024.135005</doi></addata></record>
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identifier ISSN: 0304-3894
ispartof Journal of hazardous materials, 2024-09, Vol.476, p.135005, Article 135005
issn 0304-3894
1873-3336
1873-3336
language eng
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source ScienceDirect Freedom Collection
subjects acid mine drainage
adsorption
bacteria
bioavailability
Bioremediation
calcite
carbonate dehydratase
carbonates
Carbonic anhydrase
Metal bio-immobilization
metal tolerance
nucleic acid hybridization
operon
Sporosarcina
Toxic metals and metalloids
toxicity
Urease
title Molecular and geochemical basis of microbially induced carbonate precipitation for treating acid mine drainage: The case of a novel Sporosarcina genomospecies from mine tailings
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