Comparison of manganese dioxide and permanganate as amendments with persulfate for aqueous 1,4-dioxane oxidation

Logan Bridges, Ruba A.M. Mohamed, Naima A. Khan, Mark L. Brusseau, Kenneth C. Carroll

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Persulfate (PS) is widely used to degrade emerging organic contaminants in groundwater and soil systems, and various PS activation methods (e.g., energy or chemical inputs) have been considered to increase oxidation strength. This study investigates PS activation through manganese amendment in the form of potassium permanganate (KMnO4 ) and manganese dioxide (MnO2 ) to subsequently degrade the emerging and recalcitrant groundwater contaminant 1,4-dioxane (1,4-D). The activation of PS by MnO2 was confirmed by radical trap and by product formation. The degradation kinetics of 1,4-D by PS was also compared with varying amendments of KMnO4 and MnO2 . The results showed that MnO2 activated PS, which increased the degradation rate constant of 1,4-D. KMnO4 activation of PS was not observed even though the binary oxidant mixture did enhance the degradation of 1,4-D. These results have implications for applying in situ chemical oxidation in subsurface systems, especially for conditions wherein manganese exists naturally in groundwater or aquifer minerals to support possible PS activation.

Original languageEnglish (US)
Article number3061
Pages (from-to)1-16
Number of pages16
JournalWater (Switzerland)
Volume12
Issue number11
DOIs
StatePublished - Nov 2020

Keywords

  • 1,4-dioxane
  • Advanced oxidation
  • Groundwater contamination
  • Groundwater remediation
  • ISCO
  • Manganese dioxide
  • Permanganate
  • Persulfate

ASJC Scopus subject areas

  • Biochemistry
  • Geography, Planning and Development
  • Aquatic Science
  • Water Science and Technology

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