Petroleomic analysis of the treatment of naphthenic organics in oil sands process-affected water with buoyant photocatalysts

WATER RESEARCH

卷:141

Article

Leshuk, Tim^1,2  Peru, Kerry M.³  Livera, Diogo de Oliveira^1,2  Tripp, Austin^1,2  Bardo, Patrick^1,2  Headley, John V.³  Gu, Frank^1,2 

[1] Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada

[2] Univ Waterloo, Waterloo Inst Nanotechnol, Waterloo, ON N2L 3G1, Canada

[3] Environm & Climate Change Canada, Water Sci & Technol Directorate, Saskatoon, SK S7N 3H5, Canada

关键词: Naphthenic acid;    Titanium dioxide;    Floating;    Passive;    Positive ion;    Advanced oxidation process;   

DOI  :  10.1016/j.watres.2018.05.011

来源: Elsevier

【 摘 要 】

The persistence of toxicity associated with the soluble naphthenic organic compounds (NOCs) of oil sands process-affected water (OSPW) implies that a treatment solution may be necessary to enable safe return of this water to the environment. Due to recent advances in high-resolution mass spectrometry (HRMS), the majority of the toxicity of OSPW is currently understood to derive from a subset of toxic classes, comprising only a minority of the total NOCs. Herein, oxidative treatment of OSPW with buoyant photocatalysts was evaluated under a petroleomics paradigm: chemical changes across acid-, base- and neutral-extractable organic fractions were tracked throughout the treatment with both positive and negative ion mode electrospray ionization (ESI) Orbitrap MS. Elimination of detected OS+ and NO+ classes of concern in the earliest stages of the treatment, along with preferential degradation of high carbon-numbered O-2(-) acids, suggest that photocatalysis may detoxify OSPW with higher efficiency than previously thought. Application of petroleomic level analysis offers unprecedented insights into the treatment of petroleum impacted water, allowing reaction trends to be followed across multiple fractions and thousands of compounds simultaneously. (C) 2018 Elsevier Ltd. All rights reserved.

【 授权许可】

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