Author, as appears in the article.: Demir-Duz, Hande; Perez-Estrada, Leonidas A; Alvarez, Mayra G; El-Din, Mohamed Gamal; Contreras, Sandra
Department: Enginyeria Química
URV's Author/s: Contreras Iglesias, Sandra / GARCÍA ALVAREZ, MAYRA
Keywords: Water treatment Water purification Water pollutants, chemical Water Ozone Ospw Oil and gas fields Naphthenic acids Hydrogen peroxide Electrical energy per order Carboxylic acids Advanced oxidation processes water treatment waste-water toxicity peroxide performance ozone ozonation naphthenic acids electrical energy per order degradation advanced oxidation processes
Abstract: The oil sands industry generates large volumes of oil sands process water (OSPW). There is an urgent need for OSPW treatment to reduce process water inventories and to support current reclamation approaches. This study discusses how efficient ozone (O3)-based combined advanced oxidation processes (AOPs), including hydrogen peroxide (H2O2) and UV-C, are at achieving mineralization while reducing the toxicity arising from such organic components as naphthenic acids (NAs) in OSPW. The results showed that the dissolved organic carbon (DOC) removals of 45%, 84%, 84% and 98%, obtained after 90-min treatments with O3, O3/H2O2, UVC/O3 and UVC/O3/H2O2, respectively, at a production rate of 6 g/L·h O3 were considerably higher than at lower O3 production rates. The acute toxicity on Vibrio fischeri was significantly reduced by all the treatments, which explains the high percentages of NA removal (up to 99% as confirmed by UPLC-QTOF-HRMS.) Mineralization (expressed as DOC removal) was highest with UVC/O3/H2O2 at ca. 2 mg C/L in the treated effluent, which means that it could be used as cooling/boiling process water in bitumen upgrading units. However, considering the energy demand of the treatments tested, the treatment using O3/H2O2 was found to be the most realistic for large-scale applications.
Thematic Areas: Zootecnia / recursos pesqueiros Waste management and disposal Saúde coletiva Química Pollution Odontología Nutrição Medicina veterinaria Medicina iii Medicina ii Medicina i Materiais Matemática / probabilidade e estatística Interdisciplinar Historia Geografía Geociências Farmacia Environmental sciences Environmental engineering Environmental chemistry Ensino Engenharias iii Engenharias ii Engenharias i Enfermagem Direito Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Ciência da computação Biotecnología Biodiversidade Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: sandra.contreras@urv.cat
Author identifier: 0000-0001-8917-4733
Record's date: 2024-10-12
Papper version: info:eu-repo/semantics/publishedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Science Of The Total Environment. 832 154804-
APA: Demir-Duz, Hande; Perez-Estrada, Leonidas A; Alvarez, Mayra G; El-Din, Mohamed Gamal; Contreras, Sandra (2022). O3/H2O2 and UV-C light irradiation treatment of oil sands process water. Science Of The Total Environment, 832(), 154804-. DOI: 10.1016/j.scitotenv.2022.154804
Entity: Universitat Rovira i Virgili
Journal publication year: 2022
Publication Type: Journal Publications
Repositori URV