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Rapid and efficient removal of dissolved nickel by oxic bedded sediment.

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Title: Rapid and efficient removal of dissolved nickel by oxic bedded sediment.
Authors: Mendonca, Raissa Marques1 (AUTHOR), Singer, David M2 (AUTHOR), Costello, David M1 (AUTHOR)
Source: Environmental Toxicology & Chemistry. Jul2025, Vol. 44 Issue 7, p1847-1858. 12p.
Subjects: Oxide minerals, Sediments, Marine sediment quality, Hydrogen-ion concentration, Metals removal (Sewage purification), Ferric hydroxides, Ligands (Biochemistry), Bioavailability
Abstract: Nickel (Ni) bioavailability in sediment is modified by naturally occurring ligands that can complex Ni and lessen its toxicity. Current sediment quality guidelines for Ni consider reduced sulfur and organic matter as important ligands, but more recently metal oxide minerals have been shown to alter Ni bioavailability. We assessed Ni partitioning to oxidized ligands in natural sediments by incubating five geochemically distinct low-sulfide sediments with dissolved Ni (0.5, 2, or 5 mg L−1) under different pH conditions (pH 5, 7, or 9) for 28 days. Nickel concentrations in overlying water declined rapidly in most treatments and frequently reached equilibrium within a few days, except in acidic and low Ni loading scenarios. At equilibrium, the sediment sorbed 48%–100% of the added Ni, and most test conditions removed more than 70% of the added Ni. The amount of Ni removed was strongly correlated to particle size and properties of metal oxide minerals, specifically the affinity of hydrous ferric oxides (HFOs) for Ni (i.e. NiHFO:FeHFO, KNi-HFO). Interestingly, bulk sediment characteristics were either uncorrelated or negatively correlated with the amount and rate of Ni removal. Our results show that dissolved Ni is rapidly and substantially removed from the overlying water by oxic bedded sediments in non-acidic conditions, with removal extent driven by particle size and the affinity of HFOs for Ni, and removal rate determined by overlying water pH in these sediments. [ABSTRACT FROM AUTHOR]
Copyright of Environmental Toxicology & Chemistry is the property of Oxford University Press / USA 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
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PubTypeId: academicJournal
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  Data: Rapid and efficient removal of dissolved nickel by oxic bedded sediment.
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  Data: <searchLink fieldCode="AR" term="%22Mendonca%2C+Raissa+Marques%22">Mendonca, Raissa Marques</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Singer%2C+David+M%22">Singer, David M</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Costello%2C+David+M%22">Costello, David M</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Environmental+Toxicology+%26+Chemistry%22">Environmental Toxicology & Chemistry</searchLink>. Jul2025, Vol. 44 Issue 7, p1847-1858. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Oxide+minerals%22">Oxide minerals</searchLink><br /><searchLink fieldCode="DE" term="%22Sediments%22">Sediments</searchLink><br /><searchLink fieldCode="DE" term="%22Marine+sediment+quality%22">Marine sediment quality</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen-ion+concentration%22">Hydrogen-ion concentration</searchLink><br /><searchLink fieldCode="DE" term="%22Metals+removal+%28Sewage+purification%29%22">Metals removal (Sewage purification)</searchLink><br /><searchLink fieldCode="DE" term="%22Ferric+hydroxides%22">Ferric hydroxides</searchLink><br /><searchLink fieldCode="DE" term="%22Ligands+%28Biochemistry%29%22">Ligands (Biochemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Bioavailability%22">Bioavailability</searchLink>
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  Label: Abstract
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  Data: Nickel (Ni) bioavailability in sediment is modified by naturally occurring ligands that can complex Ni and lessen its toxicity. Current sediment quality guidelines for Ni consider reduced sulfur and organic matter as important ligands, but more recently metal oxide minerals have been shown to alter Ni bioavailability. We assessed Ni partitioning to oxidized ligands in natural sediments by incubating five geochemically distinct low-sulfide sediments with dissolved Ni (0.5, 2, or 5 mg L−1) under different pH conditions (pH 5, 7, or 9) for 28 days. Nickel concentrations in overlying water declined rapidly in most treatments and frequently reached equilibrium within a few days, except in acidic and low Ni loading scenarios. At equilibrium, the sediment sorbed 48%–100% of the added Ni, and most test conditions removed more than 70% of the added Ni. The amount of Ni removed was strongly correlated to particle size and properties of metal oxide minerals, specifically the affinity of hydrous ferric oxides (HFOs) for Ni (i.e. NiHFO:FeHFO, KNi-HFO). Interestingly, bulk sediment characteristics were either uncorrelated or negatively correlated with the amount and rate of Ni removal. Our results show that dissolved Ni is rapidly and substantially removed from the overlying water by oxic bedded sediments in non-acidic conditions, with removal extent driven by particle size and the affinity of HFOs for Ni, and removal rate determined by overlying water pH in these sediments. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Environmental Toxicology & Chemistry is the property of Oxford University Press / USA 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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    Identifiers:
      – Type: doi
        Value: 10.1093/etojnl/vgaf114
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      – Code: eng
        Text: English
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        PageCount: 12
        StartPage: 1847
    Subjects:
      – SubjectFull: Oxide minerals
        Type: general
      – SubjectFull: Sediments
        Type: general
      – SubjectFull: Marine sediment quality
        Type: general
      – SubjectFull: Hydrogen-ion concentration
        Type: general
      – SubjectFull: Metals removal (Sewage purification)
        Type: general
      – SubjectFull: Ferric hydroxides
        Type: general
      – SubjectFull: Ligands (Biochemistry)
        Type: general
      – SubjectFull: Bioavailability
        Type: general
    Titles:
      – TitleFull: Rapid and efficient removal of dissolved nickel by oxic bedded sediment.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Mendonca, Raissa Marques
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          Name:
            NameFull: Singer, David M
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            NameFull: Costello, David M
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          Dates:
            – D: 01
              M: 07
              Text: Jul2025
              Type: published
              Y: 2025
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              Value: 44
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            – TitleFull: Environmental Toxicology & Chemistry
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