Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 217, Issue -, Pages 411-415Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2018.03.129
Keywords
Oily scum; Treatment; Catalytic wet persulfate oxidation; Petroleum hydrocarbons
Categories
Funding
- Key research and development project of Hunan Province, China [2016SK2015]
- National Natural Science Foundation of China [51739004, 51521006, 21776066, 71431006]
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Oily scum, a hazardous by-product of petroleum industry, need to be deposed urgently to reduce environmental risks. This paper introduces catalytic wet persulfate oxidation (CWPO) process in the treatment of oily scum to realize risk relief. Under the activation of heat and Fe2+, persulfate (PS) was decomposed into sulfate radicals and hydroxyl radicals, which played a major role on the degradation of petroleum hydrocarbons. The effects of wet air oxidation (WAO) and CWPO process on the degradation of oily scum were compared. In CWPO process, the total petroleum hydrocarbons (TPHs) content of oily scum was decreased from 92.63% to 16.75%, which was still up to 70.19% in WAO process. The degradation rate of TPHs in CWPO process was about 3.38 times higher than that in WAO process. The great performance of CWPO process was also confirmed by elemental analysis, which indicated that the C and H contents of oily scum were reduced significantly by CWPO process. These results indicated that CWPO process has high potential on the degradation of oily scum for environmental protection. (C) 2018 Elsevier Ltd. All rights reserved.
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