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 language | English |
|---|---|
| Pages (from-to) | 1383-1387 |
| Number of pages | 5 |
| Journal | Chemosphere |
| Volume | 57 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2004 Dec |
Bibliographical note
Funding Information:This study was supported by Korea Institute of Science & Technology Evaluation and Planning (KISTEP) and Ministry of Science & Technology (MOST), Korean government, through its National Nuclear Technology Program.
Keywords
- Clay
- EPR
- Gamma-radiation
- PCE
- Radiocatalysis
ASJC Scopus subject areas
- Environmental Engineering
- General Chemistry
- Environmental Chemistry
- Pollution
- Public Health, Environmental and Occupational Health
- Health, Toxicology and Mutagenesis
