Removal of uranium (VI) from aqueous systems by nanoscale zero-valent iron particles suspended in carboxy-methyl cellulose

Ioana-Carmen Popescu (Hostuc)*, Petru Filip, Doina Humelnicu, Ionel Humelnicu, Thomas Bligh Scott, Richard Andrew Crane

*Corresponding author for this work

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

33 Citations (Scopus)

Abstract

Carboxy-methyl-cellulose (CMC), a common "delivery vehicle" for the subsurface deployment of iron nanoparticles (INP) has been tested in the current work for the removal of aqueous uranium from synthetic water samples. A comparison of the removal of aqueous uranium from solutions using carboxy-methyl-cellulose with and without iron nanoparticles (CMC-INP and CMC, respectively) was tested over a 48 h reaction period. Analysis of liquid samples using spectrophotometry determined a maximum sorption capacity of uranium, Q(max), of 185.18 mg/g and 322.58 mg/g for CMC and CMC-INP respectively, providing strong evidence of an independent aqueous uranium removal ability exhibited by CMC. The results point out that CMC provides an additional capacity for aqueous uranium removal. Further tests are required to determine whether similar behaviour will be observed for other aqueous contaminant species and if the presence of CMC within a INP slurry inhibits or aids the reactivity, reductive capacity and affinity of INP for aqueous contaminant removal. (C) 2013 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)250-255
Number of pages6
JournalJournal of Nuclear Materials
Volume443
Issue number1-3
DOIs
Publication statusPublished - Nov 2013

Keywords

  • SUPPORTED ZEROVALENT IRON
  • URANYL IONS
  • NANOPARTICLES
  • GROUNDWATER
  • REDUCTION
  • DECHLORINATION
  • CONTAMINANTS
  • REMEDIATION
  • ADSORPTION
  • COMPOSITE

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