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Elucidating mechanisms of toxic action of dissolved organic chemicals in oil sands process-affected water (OSPW)
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Number of Authors: 62017 (English)In: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Vol. 186, p. 893-900Article in journal (Refereed) Published
Abstract [en]

Oil sands process-affected water (OSPW) is generated during extraction of bitumen in the surface-mining oil sands industry in Alberta, Canada, and is acutely and chronically toxic to aquatic organisms. It is known that dissolved organic compounds in OSPW are responsible for most toxic effects, but knowledge of the specific mechanism(s) of toxicity, is limited. Using bioassay-based effects-directed analysis, the dissolved organic fraction of OSPW has previously been fractionated, ultimately producing refined samples of dissolved organic chemicals in OSPW, each with distinct chemical profiles. Using the Escherichia coli K-12 strain MG1655 gene reporter live cell array, the present study investigated relationships between toxic potencies of each fraction, expression of genes and characterization of chemicals in each of five acutely toxic and one non-toxic extract of OSPW derived by use of effects-directed analysis. Effects on expressions of genes related to response to oxidative stress, protein stress and DNA damage were indicative of exposure to acutely toxic extracts of OSPW. Additionally, six genes were uniquely responsive to acutely toxic extracts of OSPW. Evidence presented supports a role for sulphur- and nitrogen-containing chemical classes in the toxicity of extracts of OSPW.

Place, publisher, year, edition, pages
2017. Vol. 186, p. 893-900
Keywords [en]
OSPW, Live cell array, Mechanism of toxicity, Genomics, Oxidative stress, DNA
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-148967DOI: 10.1016/j.chemosphere.2017.08.025ISI: 000411846900104PubMedID: 28830063OAI: oai:DiVA.org:su-148967DiVA, id: diva2:1163577
Available from: 2017-12-07 Created: 2017-12-07 Last updated: 2017-12-07Bibliographically approved

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Martin, Jonathan W.
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CiteExportLink to record
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  • apa
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