Catalyzed ozonation process with GAC and metal doped-GAC for removing organic pollutants
Oh, B.S.; Song, S.J.; Lee, E.T.; Oh, H.J.; Kang, J.W.
Water Science and Technology a Journal of the International Association on Water Pollution Research 49(4): 45-49
2004
ISSN/ISBN: 0273-1223 PMID: 15077946 Document Number: 575166
The purpose of this study was to investigate the catalytic role of granular activated carbon (GAC), and metal (Mn or Fe) doped-GAC, on the transformation of ozone into more reactive secondary radicals, such as hydroxyl radicals (.OH), for the treatment of wastewater. The GAC doped with Mn showed the highest catalytic performance in terms of ozone decomposition into OH radicals. Likewise, activated carbon alone accelerated the ozone decomposition, resulting in the formation of .OH radicals. In the presence of promoters, the ozone depletion rate was enhanced further by the Mn-GAC catalyst system, even under aqueous acidic pH conditions.