Department: Enginyeria Química

URV's Author/s: Silvia Jiménez, Mario Andreozzi, María M. Micó, Mayra G. Álvarez, Sandra Contreras

Project code: 688989-2

Keywords: Photocatalysis; Photo-Fenton; Sono-Fenton; Ozonation; Acetic acid

Abstract: 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 PWwas 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 O3 and 1500 mg 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).

licence for use: https://creativecommons.org/licenses/by/3.0/es/

Author's mail: sandra.contreras@urv.cat

Record's date: 2019-05-30

Last page: 21

Journal volume: 666

Papper version: info:eu-repo/semantics/publishedVersion

Link to the original source: https://www.sciencedirect.com/science/article/pii/S0048969719306163

Funding program: HORIZON 2020

APA: Jiménez, S., Andreozzi, M., Micó, M.M., G. Álvarez, M., Contreras, S. Produced water treatment by advanced oxidation processes. Science of the Total Environment 666 (2019) 12-21

Article's DOI: 10.1016/j.scitotenv.2019.02.128

Journal publication year: 2019

Funding program action: INTEGROIL

First page: 12