View in EDS

The effect of aqueous corrosion on the structure and reactivity of zero-valent iron nanoparticles.

Saved in:
Bibliographic Details
Title: The effect of aqueous corrosion on the structure and reactivity of zero-valent iron nanoparticles.
Authors: Pullin, Huw1 phxhp@bristol.ac.uk, Springell, Ross1, Parry, Stephen2, Scott, Thomas1
Source: Chemical Engineering Journal. Jan2017, Vol. 308, p568-577. 10p.
Subjects: Nanoparticles, Aqueous solutions, Chemical structure, Amorphous alloys, Hydroxides, Surface area
Abstract: The following work investigates the effect of aqueous corrosion on the structure of zero-valent iron nanoparticles (hereafter nZVI), and their effectiveness in removing heavy metal contaminants from solution. Our results indicate the corrosion of nZVI is characterised by three periods of activity: i) (<1 d) a rapid change, with the formation of large volumes of amorphous corrosion products (Fe 3+ hydroxides with considerable adsorbed water, tentatively, ferrihydrite) with concurrent formation of magnetite; ii) (<4 w) the formation of maghemite, a reduction in surface area and a slow transformation to metastable lepidocrocite; iii) (>4 w) a stabilisation of surface stoichiometry and surface area, the loss of all zero-valent iron and the formation of goethite, which is ascribed as the likely final state of nZVI in geochemically simple solutions. This final transformation was continuing as the experiment concluded. All nZVI corrosion products identified in this study have also been identified as existing in natural environments at the same scale lengths. The reactivity of nZVI exhibited a significant reduction with increasing oxidation, although the reduction in reactivity varies according to the contaminant uptake mechanism. From this work, it is proposed that nZVI will have a considerably greater reactive longevity in the natural environment than previously thought, in the order of weeks or months rather than days as previously reported. [ABSTRACT FROM AUTHOR]
Copyright of Chemical Engineering Journal 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
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 119340276
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: The effect of aqueous corrosion on the structure and reactivity of zero-valent iron nanoparticles.
– Name: Author
  Label: Authors
  Group: Au
  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Pullin%2C+Huw%22&quot;&gt;Pullin, Huw&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt;&lt;i&gt; phxhp@bristol.ac.uk&lt;/i&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Springell%2C+Ross%22&quot;&gt;Springell, Ross&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Parry%2C+Stephen%22&quot;&gt;Parry, Stephen&lt;/searchLink&gt;&lt;relatesTo&gt;2&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Scott%2C+Thomas%22&quot;&gt;Scott, Thomas&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt;
– Name: TitleSource
  Label: Source
  Group: Src
  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Chemical+Engineering+Journal%22&quot;&gt;Chemical Engineering Journal&lt;/searchLink&gt;. Jan2017, Vol. 308, p568-577. 10p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: &lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Nanoparticles%22&quot;&gt;Nanoparticles&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Aqueous+solutions%22&quot;&gt;Aqueous solutions&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Chemical+structure%22&quot;&gt;Chemical structure&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Amorphous+alloys%22&quot;&gt;Amorphous alloys&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Hydroxides%22&quot;&gt;Hydroxides&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Surface+area%22&quot;&gt;Surface area&lt;/searchLink&gt;
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The following work investigates the effect of aqueous corrosion on the structure of zero-valent iron nanoparticles (hereafter nZVI), and their effectiveness in removing heavy metal contaminants from solution. Our results indicate the corrosion of nZVI is characterised by three periods of activity: i) (&lt;1 d) a rapid change, with the formation of large volumes of amorphous corrosion products (Fe 3+ hydroxides with considerable adsorbed water, tentatively, ferrihydrite) with concurrent formation of magnetite; ii) (&lt;4 w) the formation of maghemite, a reduction in surface area and a slow transformation to metastable lepidocrocite; iii) (&gt;4 w) a stabilisation of surface stoichiometry and surface area, the loss of all zero-valent iron and the formation of goethite, which is ascribed as the likely final state of nZVI in geochemically simple solutions. This final transformation was continuing as the experiment concluded. All nZVI corrosion products identified in this study have also been identified as existing in natural environments at the same scale lengths. The reactivity of nZVI exhibited a significant reduction with increasing oxidation, although the reduction in reactivity varies according to the contaminant uptake mechanism. From this work, it is proposed that nZVI will have a considerably greater reactive longevity in the natural environment than previously thought, in the order of weeks or months rather than days as previously reported. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: &lt;i&gt;Copyright of Chemical Engineering Journal is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder&#39;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.&lt;/i&gt; (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=119340276
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.cej.2016.09.088
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 10
        StartPage: 568
    Subjects:
      – SubjectFull: Nanoparticles
        Type: general
      – SubjectFull: Aqueous solutions
        Type: general
      – SubjectFull: Chemical structure
        Type: general
      – SubjectFull: Amorphous alloys
        Type: general
      – SubjectFull: Hydroxides
        Type: general
      – SubjectFull: Surface area
        Type: general
    Titles:
      – TitleFull: The effect of aqueous corrosion on the structure and reactivity of zero-valent iron nanoparticles.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Pullin, Huw
      – PersonEntity:
          Name:
            NameFull: Springell, Ross
      – PersonEntity:
          Name:
            NameFull: Parry, Stephen
      – PersonEntity:
          Name:
            NameFull: Scott, Thomas
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 15
              M: 01
              Text: Jan2017
              Type: published
              Y: 2017
          Identifiers:
            – Type: issn-print
              Value: 13858947
          Numbering:
            – Type: volume
              Value: 308
          Titles:
            – TitleFull: Chemical Engineering Journal
              Type: main
ResultId 1