Ferrate(VI) oxidation of pentachlorophenol in water and soil

Olivier Monfort*, Muhammad Usman, Khalil Hanna

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Although the use of ferrate (VI), an emerging green oxidant, has been widely investigated to remove organic pollutants in water, its ability to remediate contaminated soils has been scarcely evaluated. Here, we explore the use of ferrate (VI) to degrade a polychlorinated persistent compound, the pentachlorophenol (PCP), in aqueous solution and in an aged contaminated soil under batch, water-saturated and water-unsaturated flow conditions. The first results showed the prominent efficiency of ferrate (VI) over conventional oxidants (e.g. H2O2 and persulfate) in both matrices and at different oxidant doses. In aqueous solution, more than 80% of PCP was degraded by ferrate (VI) while complete removal was observed in soil under batch conditions. In column experiments, PCP removal by ferrate (VI) remained efficient but dependent on the flow rate and water saturation. Maximum PCP removal (95%) in columns was observed under water saturated conditions when ferrate (VI) (0.2 g g−1 of soil) was injected at a low flow rate (i.e. 0.025 mL min−1). This study has strong implications in the development of new sustainable processes based on ferrate (VI) for the remediation of different environmental compartments.

Original languageEnglish
Article number126550
JournalChemosphere
Volume253
DOIs
Publication statusPublished - Aug 2020

Keywords

  • Chemical oxidation
  • Ferrate(VI)
  • PCP Remediation
  • Soil
  • Water

ASJC Scopus subject areas

  • Environmental Engineering
  • Chemistry(all)
  • Environmental Chemistry
  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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