Investigation of heavy oil refinery wastewater treatment by integrated ozone and activated carbon -supported manganese oxides

CATEGORY: WASTEWATER TREATMENT
Fuel Processing Technology, Volume 124, August 2014, Pages 165–173
Investigation of heavy oil refinery wastewater treatment by integrated ozone and activated carbon -supported manganese oxides
Chunmao Chen, Lingyong Wei, Xuan Guo, Shaohui Guo, Guangxu Yan
State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Oil & Gas Pollution Control, China University of Petroleum, 18 Fuxue Road, Changping District, Beijing 102249, China
Abstract
Researchers used activated carbon-supported manganese oxides (MnO_x/GAC) for catalytic ozonation of heavy oil refinery wastewater (HORW). After characterization of MnO_x/GAC, the effects of reaction parameters on HORW treatment were investigated.
The dominant mechanism of HOPW catalytic ozonation was  found to be  oxidation via hydroxyl radicals over MnO_x/GAC. The results suggested that big molecular pollutants with high toxicity and low biodegradability were first degraded to small molecular oxidation products with low toxicity and high biodegradability, after which small molecular pollutants and oxidation products further oxidized or mineralized.
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