EPR characterization of the catalytic activity of clays for PCE removal by gamma-radiation induced by acid and thermal treatments

Hung Ho Chung, Sang Won Choi, Yong Sik Ok, Jinho Jung

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6 Citations (Scopus)

Abstract

Clays from tidal flat sediments showed efficient catalytic activity in the decomposition of PCE by gamma-radiation. The highest PCE removal of 98.6% was obtained with clays heated to 700°C after acid treatment. The improved catalytic activity was identified by electron paramagnetic resonance (EPR) spectroscopy. The EPR spectra of clays were significantly changed by the acid and thermal treatments. The intensity of a narrow signal at g = 2 (signal III) was decreased with increasing thermal treatment temperature and this increased the PCE removal efficiency. The acid treatment completely removed a broad signal at g = 2 (signal II), decreased the intensity of signal III, and improved the gamma-radiation treatment of PCE.

Original languageEnglish
Pages (from-to)1383-1387
Number of pages5
JournalChemosphere
Volume57
Issue number10
DOIs
Publication statusPublished - 2004 Dec 1

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Keywords

  • Clay
  • EPR
  • Gamma-radiation
  • PCE
  • Radiocatalysis

ASJC Scopus subject areas

  • Environmental Chemistry
  • Environmental Science(all)

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