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Valence-dependent dynamics: quantitatively understanding arsenic reallocations on iron oxyhydroxide mediated by microbial respiration.

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Title: Valence-dependent dynamics: quantitatively understanding arsenic reallocations on iron oxyhydroxide mediated by microbial respiration.
Authors: Hong, Zebin1 (AUTHOR), Liu, Kai1 (AUTHOR), Li, Fangbai1 (AUTHOR), Borch, Thomas2 (AUTHOR), Wu, Yundang1 (AUTHOR), Liao, Congjian1 (AUTHOR), Zhou, Xiaoxia1 (AUTHOR), Liu, Tongxu1 (AUTHOR) txliu@soil.gd.cn, Shi, Qiantao3 (AUTHOR), Fang, Liping1 (AUTHOR) lpfang@soil.gd.cn
Source: Chemical Geology. Dec2024, Vol. 670, pN.PAG-N.PAG. 1p.
Subjects: Microbial respiration, Charge exchange, Environmental soil science, Biogeochemistry, Iron, Arsenic
Abstract: Iron (Fe) oxyhydroxides are important reservoirs of arsenic (As) in soil and subsurface environments, and microbially-driven reductive transformation of Fe oxyhydroxides likely triggers arsenic release in soil under anoxic conditions. Due to a significant difference in the geochemical properties between As(III) and As(V), their interaction with Fe oxyhydroxides can be different. In addition, a quantitative understanding of the key processes that control the redistribution of As at the dynamically changing interface of water and Fe oxyhydroxides is of great importance, yet it remains elusive. Here this study quantitatively investigated the intricate arsenic redistribution at this dynamically changing interface of ferrihydrite (Fh) and water mediated by S. oneidensis under anoxic conditions. This work reveals that the dynamic changes in As reallocation at this interface is highly valance-dependent and distinctly contrasting. The microbial reduction of ferrihydrite led to a gradual release of As(III), while promoting fixation of As(V) on iron oxyhydroxides from water. Increasing As/Fe ratio inhibit the transformation of Fh, thereby reducing the release of As(III) and eenhancing As(V) fixation. Our kinetic model based on multi-process coupled reactions quantitatively unveiled that the transformation of Fh and Lp predominantly contributes 98.7 % - 99.2 % to the release of As(III) and As(V), while the formation of symplesite reversed the overall trend of As(V). These findings significantly expand our understanding of the coupled biogeochemistry of Fe and As, which may be useful for precise arsenic remediation and also for accurately predicting its geochemical behaviors in soil and subsurface environments. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of Chemical Geology 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.)
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DbLabel: Engineering Source
An: 180854500
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  Label: Title
  Group: Ti
  Data: Valence-dependent dynamics: quantitatively understanding arsenic reallocations on iron oxyhydroxide mediated by microbial respiration.
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Hong%2C+Zebin%22">Hong, Zebin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Kai%22">Liu, Kai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Fangbai%22">Li, Fangbai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Borch%2C+Thomas%22">Borch, Thomas</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Yundang%22">Wu, Yundang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liao%2C+Congjian%22">Liao, Congjian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhou%2C+Xiaoxia%22">Zhou, Xiaoxia</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Tongxu%22">Liu, Tongxu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> txliu@soil.gd.cn</i><br /><searchLink fieldCode="AR" term="%22Shi%2C+Qiantao%22">Shi, Qiantao</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fang%2C+Liping%22">Fang, Liping</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> lpfang@soil.gd.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Chemical+Geology%22">Chemical Geology</searchLink>. Dec2024, Vol. 670, pN.PAG-N.PAG. 1p.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Microbial+respiration%22">Microbial respiration</searchLink><br /><searchLink fieldCode="DE" term="%22Charge+exchange%22">Charge exchange</searchLink><br /><searchLink fieldCode="DE" term="%22Environmental+soil+science%22">Environmental soil science</searchLink><br /><searchLink fieldCode="DE" term="%22Biogeochemistry%22">Biogeochemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Iron%22">Iron</searchLink><br /><searchLink fieldCode="DE" term="%22Arsenic%22">Arsenic</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Iron (Fe) oxyhydroxides are important reservoirs of arsenic (As) in soil and subsurface environments, and microbially-driven reductive transformation of Fe oxyhydroxides likely triggers arsenic release in soil under anoxic conditions. Due to a significant difference in the geochemical properties between As(III) and As(V), their interaction with Fe oxyhydroxides can be different. In addition, a quantitative understanding of the key processes that control the redistribution of As at the dynamically changing interface of water and Fe oxyhydroxides is of great importance, yet it remains elusive. Here this study quantitatively investigated the intricate arsenic redistribution at this dynamically changing interface of ferrihydrite (Fh) and water mediated by S. oneidensis under anoxic conditions. This work reveals that the dynamic changes in As reallocation at this interface is highly valance-dependent and distinctly contrasting. The microbial reduction of ferrihydrite led to a gradual release of As(III), while promoting fixation of As(V) on iron oxyhydroxides from water. Increasing As/Fe ratio inhibit the transformation of Fh, thereby reducing the release of As(III) and eenhancing As(V) fixation. Our kinetic model based on multi-process coupled reactions quantitatively unveiled that the transformation of Fh and Lp predominantly contributes 98.7 % - 99.2 % to the release of As(III) and As(V), while the formation of symplesite reversed the overall trend of As(V). These findings significantly expand our understanding of the coupled biogeochemistry of Fe and As, which may be useful for precise arsenic remediation and also for accurately predicting its geochemical behaviors in soil and subsurface environments. [Display omitted] [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Chemical Geology 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:
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      – Type: doi
        Value: 10.1016/j.chemgeo.2024.122426
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Microbial respiration
        Type: general
      – SubjectFull: Charge exchange
        Type: general
      – SubjectFull: Environmental soil science
        Type: general
      – SubjectFull: Biogeochemistry
        Type: general
      – SubjectFull: Iron
        Type: general
      – SubjectFull: Arsenic
        Type: general
    Titles:
      – TitleFull: Valence-dependent dynamics: quantitatively understanding arsenic reallocations on iron oxyhydroxide mediated by microbial respiration.
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              Text: Dec2024
              Type: published
              Y: 2024
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