期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 666, 期 -, 页码 12-21出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2019.02.128
关键词
Photocatalysis; Photo-Fenton; Sono-Fenton; Ozonation; Acetic acid
资金
- Government of Catalonia [2013 DI 037]
- European Union's Horizon 2020 research and innovation program [688989]
- Spanish Ministry of Economy and Competitiveness (MINECO) in the Network of Excellence FOTOCAT [CTM2015-71054-REDT]
- H2020 Societal Challenges Programme [688989] Funding Source: H2020 Societal Challenges Programme
Different Advanced Oxidation Processes (AOPs) such as photocatalysis, Fenton-based processes and ozonation were studied to include one of these technologies within an integrated solution for produced water (PW) polishing. Synthetic PW was prepared adding toluene, xylene, naphthalene, phenol, acetic and malonic acids to a seawater matrix. Despite that in all AOPs studied in this work BTEX and naphthalene were removed, the efficiency (in terms of TOC removal) of each treatment varied largely. Among these techniques, photocatalysis was found to be the less effective for the treatment of PW, as TOC removals lower than 20% were obtained for the best scenario after 4 h treatment. In the contrary, best results were obtained by ozonation combined with H2O2, where all the organic components were removed, including a high percentage of acetic acid, which was not abated by the rest of the AOPs studied. The optimum conditions for ozonation were 4 g h(-1) O-3 and 1500 nig L-1 H2O2 at pH 10, where after 2 h a 74% of TOC removal was achieved and the acetic acid elimination was 78%. This condition enabled that ozonation process accounted for the lowest electric energy consumption per order of target compound destruction regarding total organic carbon (TOC). (C) 2019 The Authors. Published by Elsevier B.V.
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