Abstract
Radiation treatment using gamma-rays was investigated in order to reclaim the secondary effluent from a sewage treatment plant. The radiation treatment reduced BOD by 85% irrespective of absorbed dose, and the removals of COD, TOC and color were up to 64%, 34% and 88%, respectively, at a dose of 15 kGy. Gamma-rays effectively disinfected microorganisms and completely removed them at a dose of 0.3 kGy. The combination of gamma-rays and titanium dioxide significantly improved the treatment process. The increases of COD, TOC and color removals were 40%, 10% and 20%, respectively. As confirmed by EPR and the spin-trapping method, this increase was partly caused by the increase of hydroxyl radicals in the presence of titanium dioxide.
Original language | English |
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Pages (from-to) | 533-537 |
Number of pages | 5 |
Journal | Radiation Physics and Chemistry |
Volume | 65 |
Issue number | 4-5 |
DOIs | |
Publication status | Published - 2002 Nov |
Bibliographical note
Funding Information:We would like to thank Dr. Young-Hwan Cho and Miss Mi-Ran Yoo at KAERI for their help on EPR spectroscopy. This work was supported by the Nuclear R&D Program of MOST, Korea.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
Keywords
- EPR
- Gamma-rays
- Sewage effluent
- Titanium dioxide
ASJC Scopus subject areas
- Radiation