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Effects of zero-valent iron added in the flooding or drainage process on cadmium immobilization in an acid paddy soil.

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Title: Effects of zero-valent iron added in the flooding or drainage process on cadmium immobilization in an acid paddy soil.
Authors: Meng, Hanbing1,2,3 (AUTHOR), Hu, Shiwen1,2 (AUTHOR), Hong, Zebin2 (AUTHOR), Chi, Wenting2 (AUTHOR), Chen, Guojun2 (AUTHOR), Cheng, Kuan2 (AUTHOR), Wang, Qi2 (AUTHOR), Liu, Tongxu2 (AUTHOR), Li, Fangbai2 (AUTHOR), Liu, Kexue4 (AUTHOR), Yang, Yang1,2 (AUTHOR) yyang@soil.gd.cn
Source: Journal of Environmental Sciences (Elsevier). Apr2024, Vol. 138, p19-31. 13p.
Subject Terms: *Acid soils, *Iron, *Drainage, *Soil acidity, *Floods, *Cadmium
Abstract: • More Cd was immobilized in the flooding period than that in the drainage period. • ZVI reduced the release of Cd and promoted Cd immobilization during drainage process. • Adding ZVI was more conducive to Cd immobilization than directly increasing soil pH. • Adding ZVI in the flooding stage immobilized more Cd than that in the drainage stage. Zero-valent iron (ZVI) is a promising material for the remediation of Cd-contaminated paddy soils. However, the effects of ZVI added during flooding or drainage processes on cadmium (Cd) retention remain unclear. Herein, Cd-contaminated paddy soil was incubated for 40 days of flooding and then for 15 days of drainage, and the underlying mechanisms of Cd immobilization coupled with Fe/S/N redox processes were investigated. The addition of ZVI to the flooding process was more conducive to Cd immobilization. Less potential available Cd was detected by adding ZVI before flooding, which may be due to the increase in paddy soil pH and newly formed secondary Fe minerals. Moreover, the reductive dissolution of Fe minerals promoted the release of soil colloids, thereby increasing significantly the surface sites and causing Cd immobilization. Additionally, the addition of ZVI before flooding played a vital role in Cd retention after soil drainage. In contrast, the addition of ZVI in the drainage phase was not conducive to Cd retention, which might be due to the rapid decrease in soil pH that inhibited Cd adsorption and further immobilization on soil surfaces. The findings of this study demonstrated that Cd availability in paddy soil was largely reduced by adding ZVI during the flooding period and provide a novel insight into the mechanisms of ZVI remediation in Cd-contaminated paddy soils. [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.)
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  Label: Title
  Group: Ti
  Data: Effects of zero-valent iron added in the flooding or drainage process on cadmium immobilization in an acid paddy soil.
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  Data: <searchLink fieldCode="AR" term="%22Meng%2C+Hanbing%22">Meng, Hanbing</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hu%2C+Shiwen%22">Hu, Shiwen</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hong%2C+Zebin%22">Hong, Zebin</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chi%2C+Wenting%22">Chi, Wenting</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Guojun%22">Chen, Guojun</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cheng%2C+Kuan%22">Cheng, Kuan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Qi%22">Wang, Qi</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Tongxu%22">Liu, Tongxu</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Fangbai%22">Li, Fangbai</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Kexue%22">Liu, Kexue</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Yang%22">Yang, Yang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> yyang@soil.gd.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Environmental+Sciences+%28Elsevier%29%22">Journal of Environmental Sciences (Elsevier)</searchLink>. Apr2024, Vol. 138, p19-31. 13p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Acid+soils%22">Acid soils</searchLink><br />*<searchLink fieldCode="DE" term="%22Iron%22">Iron</searchLink><br />*<searchLink fieldCode="DE" term="%22Drainage%22">Drainage</searchLink><br />*<searchLink fieldCode="DE" term="%22Soil+acidity%22">Soil acidity</searchLink><br />*<searchLink fieldCode="DE" term="%22Floods%22">Floods</searchLink><br />*<searchLink fieldCode="DE" term="%22Cadmium%22">Cadmium</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • More Cd was immobilized in the flooding period than that in the drainage period. • ZVI reduced the release of Cd and promoted Cd immobilization during drainage process. • Adding ZVI was more conducive to Cd immobilization than directly increasing soil pH. • Adding ZVI in the flooding stage immobilized more Cd than that in the drainage stage. Zero-valent iron (ZVI) is a promising material for the remediation of Cd-contaminated paddy soils. However, the effects of ZVI added during flooding or drainage processes on cadmium (Cd) retention remain unclear. Herein, Cd-contaminated paddy soil was incubated for 40 days of flooding and then for 15 days of drainage, and the underlying mechanisms of Cd immobilization coupled with Fe/S/N redox processes were investigated. The addition of ZVI to the flooding process was more conducive to Cd immobilization. Less potential available Cd was detected by adding ZVI before flooding, which may be due to the increase in paddy soil pH and newly formed secondary Fe minerals. Moreover, the reductive dissolution of Fe minerals promoted the release of soil colloids, thereby increasing significantly the surface sites and causing Cd immobilization. Additionally, the addition of ZVI before flooding played a vital role in Cd retention after soil drainage. In contrast, the addition of ZVI in the drainage phase was not conducive to Cd retention, which might be due to the rapid decrease in soil pH that inhibited Cd adsorption and further immobilization on soil surfaces. The findings of this study demonstrated that Cd availability in paddy soil was largely reduced by adding ZVI during the flooding period and provide a novel insight into the mechanisms of ZVI remediation in Cd-contaminated paddy soils. [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.2023.03.032
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 13
        StartPage: 19
    Subjects:
      – SubjectFull: Acid soils
        Type: general
      – SubjectFull: Iron
        Type: general
      – SubjectFull: Drainage
        Type: general
      – SubjectFull: Soil acidity
        Type: general
      – SubjectFull: Floods
        Type: general
      – SubjectFull: Cadmium
        Type: general
    Titles:
      – TitleFull: Effects of zero-valent iron added in the flooding or drainage process on cadmium immobilization in an acid paddy soil.
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            NameFull: Meng, Hanbing
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            NameFull: Hu, Shiwen
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            NameFull: Hong, Zebin
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            NameFull: Chi, Wenting
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            NameFull: Li, Fangbai
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            NameFull: Liu, Kexue
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            – D: 01
              M: 04
              Text: Apr2024
              Type: published
              Y: 2024
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              Value: 138
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