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In-situ suppression of acid mine drainage from non-ferrous metal mine waste rocks using microbially induced carbonate precipitation.

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Title: In-situ suppression of acid mine drainage from non-ferrous metal mine waste rocks using microbially induced carbonate precipitation.
Authors: Lin, Hai1,2 (AUTHOR), Li, Xinru1 (AUTHOR), Zhou, Mengying1 (AUTHOR), Dong, Yingbo1,2 (AUTHOR) ybdong@ustb.edu.cn
Source: Journal of Environmental Sciences (Elsevier). May2026, Vol. 163, p857-866. 10p.
Subjects: Acid mine drainage, Biomineralization, Sulfates, Mine waste, Microbial communities, Environmental remediation, Copper mining
Abstract: • Waste rocks post-microbially induced carbonate precipitation (MICP) biomineralization show good and stable acid-control effects. • The SO 4 2- concentration was decreased by 71.2 % under biomineralization of carbonate-mineralizing bacterial consortium (UPC). • Adsorption between waste rocks and carbonate-mineralizing flora is mainly chemical multi-layer adsorption. • Mineralization covers waste rock surfaces, reducing S and Fe element exposure. Acid mine drainage (AMD) from sulfide-rich copper mine waste rocks poses severe environmental risks, yet sustainable in situ mitigation strategies remain limited. Microbially induced carbonate precipitation (MICP) has emerged as a promising approach, but its efficiency and long-term stability in mine waste environments are not fully understood. In this study, a carbonate-mineralizing bacterial consortium (UPC) was applied to copper mine waste rocks, and its performance was assessed through a combination of mineralization experiments, leaching tests, scanning electron microscope and the energy dispersive spectrometer (SEM-EDS), fourier transform infrared spectrometer (FTIR), and microbial community analysis. The influences of microbial and mineralization parameters and environmental conditions were systematically investigated. Under optimized conditions (1 × 108 cfu/mL bacterial concentration, 0.75 mol/L mineralization solution, 1:1 bacterial-to-solution volume ratio, and 30 mL dosage), effluent pH remained above 7.3 and sulfate release was reduced by more than 70 %. MICP remained effective under moderate acidity (pH ≥ 5) and variable leaching rates but declined under extreme acidity (pH = 3). Multi-scale analyses revealed that dense carbonate mineral precipitates formed on the surface of waste rocks, masking reactive sites and clogging pores to reduce acid production. Additionally, microbial communities shifted from Firmicutes to Actinobacteriota dominated, collectively supporting long-term stability. These findings clarify the mechanisms by which MICP suppresses AMD and provide a technical basis for scaling up to field applications. Future research should focus on enhancing microbial acid tolerance and developing cost-effective delivery strategies for large-scale mine waste management. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of Journal of Environmental Sciences (Elsevier) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 192484051
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PubType: Academic Journal
PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: In-situ suppression of acid mine drainage from non-ferrous metal mine waste rocks using microbially induced carbonate precipitation.
– Name: Author
  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Lin%2C+Hai%22">Lin, Hai</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Xinru%22">Li, Xinru</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhou%2C+Mengying%22">Zhou, Mengying</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dong%2C+Yingbo%22">Dong, Yingbo</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> ybdong@ustb.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Environmental+Sciences+%28Elsevier%29%22">Journal of Environmental Sciences (Elsevier)</searchLink>. May2026, Vol. 163, p857-866. 10p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Acid+mine+drainage%22">Acid mine drainage</searchLink><br /><searchLink fieldCode="DE" term="%22Biomineralization%22">Biomineralization</searchLink><br /><searchLink fieldCode="DE" term="%22Sulfates%22">Sulfates</searchLink><br /><searchLink fieldCode="DE" term="%22Mine+waste%22">Mine waste</searchLink><br /><searchLink fieldCode="DE" term="%22Microbial+communities%22">Microbial communities</searchLink><br /><searchLink fieldCode="DE" term="%22Environmental+remediation%22">Environmental remediation</searchLink><br /><searchLink fieldCode="DE" term="%22Copper+mining%22">Copper mining</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • Waste rocks post-microbially induced carbonate precipitation (MICP) biomineralization show good and stable acid-control effects. • The SO 4 2- concentration was decreased by 71.2 % under biomineralization of carbonate-mineralizing bacterial consortium (UPC). • Adsorption between waste rocks and carbonate-mineralizing flora is mainly chemical multi-layer adsorption. • Mineralization covers waste rock surfaces, reducing S and Fe element exposure. Acid mine drainage (AMD) from sulfide-rich copper mine waste rocks poses severe environmental risks, yet sustainable in situ mitigation strategies remain limited. Microbially induced carbonate precipitation (MICP) has emerged as a promising approach, but its efficiency and long-term stability in mine waste environments are not fully understood. In this study, a carbonate-mineralizing bacterial consortium (UPC) was applied to copper mine waste rocks, and its performance was assessed through a combination of mineralization experiments, leaching tests, scanning electron microscope and the energy dispersive spectrometer (SEM-EDS), fourier transform infrared spectrometer (FTIR), and microbial community analysis. The influences of microbial and mineralization parameters and environmental conditions were systematically investigated. Under optimized conditions (1 × 108 cfu/mL bacterial concentration, 0.75 mol/L mineralization solution, 1:1 bacterial-to-solution volume ratio, and 30 mL dosage), effluent pH remained above 7.3 and sulfate release was reduced by more than 70 %. MICP remained effective under moderate acidity (pH ≥ 5) and variable leaching rates but declined under extreme acidity (pH = 3). Multi-scale analyses revealed that dense carbonate mineral precipitates formed on the surface of waste rocks, masking reactive sites and clogging pores to reduce acid production. Additionally, microbial communities shifted from Firmicutes to Actinobacteriota dominated, collectively supporting long-term stability. These findings clarify the mechanisms by which MICP suppresses AMD and provide a technical basis for scaling up to field applications. Future research should focus on enhancing microbial acid tolerance and developing cost-effective delivery strategies for large-scale mine waste management. [Display omitted] [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Environmental Sciences (Elsevier) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.jes.2025.11.048
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 10
        StartPage: 857
    Subjects:
      – SubjectFull: Acid mine drainage
        Type: general
      – SubjectFull: Biomineralization
        Type: general
      – SubjectFull: Sulfates
        Type: general
      – SubjectFull: Mine waste
        Type: general
      – SubjectFull: Microbial communities
        Type: general
      – SubjectFull: Environmental remediation
        Type: general
      – SubjectFull: Copper mining
        Type: general
    Titles:
      – TitleFull: In-situ suppression of acid mine drainage from non-ferrous metal mine waste rocks using microbially induced carbonate precipitation.
        Type: main
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          Name:
            NameFull: Lin, Hai
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            NameFull: Li, Xinru
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            NameFull: Zhou, Mengying
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            NameFull: Dong, Yingbo
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          Dates:
            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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              Value: 163
          Titles:
            – TitleFull: Journal of Environmental Sciences (Elsevier)
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