The implication of iron oxide nanoparticles on the removal of trichloroethylene by adsorption

Hafiz H. Salih, Craig L. Patterson, George A. Sorial, Rajib Sinha, Radha Krishnan

Research output: Contribution to journalArticlepeer-review

Abstract

The fate and transport of Fe 2O 3 NPs in a granular activated carbon (GAC) adsorber and its impact on the removal of trichloroethylene (TCE) by GAC was investigated. The hydrodynamic diameter of Fe 2O 3 NPs was measured with time to evaluate their aggregation potential. Specific surface area (SSA) and zeta potential were obtained for Fe 2O 3 NPs and GAC in order to understand their interaction. The impact of Fe 2O 3 NPs on TCE adsorption was tested by conducting TCE adsorption isotherms, kinetics and column breakthrough studies in the presence and absence of Fe 2O 3 NPs. SSA and pore size distribution of the fresh and the spent GAC were obtained. The fate and transport of the Fe 2O 3 NPs in the GAC fixed bed and their impact on TCE adsorption was found to be a function of their zeta potential, concentration, and size. Fe 2O 3 NPs formed larger aggregates in water. These aggregates attached to GAC and reduced the amount of TCE adsorbed during the breakthrough experiments suggesting a preloading pore blockage phenomenon. Pore blockage and SSA reduction occured on the used GAC. However, due to the fast adsorption kinetics of TCE no effect of Fe 2O 3 NPs was observed in the isotherm and the kinetic studies. TCE adsorption onto the Fe 2O 3 NPs was found to take place over a short period of time.

Original languageEnglish (US)
Pages (from-to)422-428
Number of pages7
JournalChemical Engineering Journal
Volume193-194
DOIs
StatePublished - Jun 15 2012
Externally publishedYes

Keywords

  • Adsorption
  • Fe O NPs
  • GAC
  • Nanoparticles
  • TCE
  • Trichloroethylene

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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