The application of zero-valent iron nanoparticles for the remediation of a uranium-contaminated waste effluent

Michelle Dickinson*, Thomas B. Scott

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

195 Citations (Scopus)

Abstract

Zero-valent iron nanoparticles (INP) were investigated as a remediation strategy for a uranium-contaminated waste effluent from AWE, Aldermaston. Nanoparticles were introduced to the effluent, under both oxic and anoxic conditions, and allowed to react for a 28-d period during which the liquid and nanoparticle solids were periodically sampled.Analysis of the solution indicated that under both conditions U was removed to <1.5% of its initial concentration within 1. h of introduction and remained at similar concentrations until approximately 48. h. A rapid release of Fe into solution was also recorded during this initial period; attributed to the limited partial dissolution of the INP. XPS analyses of the reacted nanoparticulate solids between 1 and 48. h showed an increased Fe(III):Fe(II) ratio, consistent with the detection of iron oxidation products (akaganeite and magnetite) by XRD and FIB. XPS analysis also recorded uranium on the recovered particulates indicating the chemical reduction of U(VI) to U(IV) within 1. h. Following the initial retention period U-dissolution of U was recorded from 48. h, and attributed to reoxidation.The efficient uptake and retention of U on the INP for periods up to 48. h provide proof that INP may be effectively used for the remediation of complex U-contaminated effluents. © 2010 Elsevier B.V.

Translated title of the contributionThe application of zero-valent iron nanoparticles for the remediation of a uranium-contaminated waste effluent
Original languageEnglish
Pages (from-to)171-179
Number of pages9
JournalJournal of Hazardous Materials
Volume178
Issue number1-3
DOIs
Publication statusPublished - 15 Jun 2010

Keywords

  • Iron
  • Nanoparticles
  • Remediation
  • Uranium
  • Zero-valent

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