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Alkylated polycyclic aromatic hydrocarbons in fish and risk to human health: Implications for ecological and human health risk assessements in the Alberta oil sands

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dc.contributor.author Tuarze, Pascal
dc.date.accessioned 2015-05-12T16:40:17Z
dc.date.available 2015-05-12T16:40:17Z
dc.date.issued 2015-05-12
dc.identifier.uri http://hdl.handle.net/10214/8852
dc.description.abstract The Alberta oil sands are one of the largest sources of naturally occurring bitumen in the world. Aromatics, specifically polycyclic aromatic hydrocarbons (PAHs), constitute the largest proportion of compounds found in bitumen. The risks of PAHs are well understood, they are known to contribute to cancer development in humans and alter early life stage development in fish inhabiting the Athabasca region, within the Alberta oil sands. However, the risks posed by alkyl substituted PAHs (A-PAHs) remain uncertain and are being neglected by decision makers like the Canadian Environmental Assessment Agency (CEAA). A-PAHs are potentially toxic to aquatic organisms, making them a concern in Ecological Risk Assessment (ERA) and are also potentially, mutagenic and carcinogenic, making them a particular concern in Human Health Risk Assessment (HHRA). Elevated loading of PAHs into ecosystems during snowmelt is a particular concern for fish within ecosystems, as snowmelt occurs during fish spawning periods. For these reasons the effects of A-PAHs derived from bitumen on fish health, and human health were targeted for this review paper. Though concrete evidence does not yet exist, information is becoming more available to evaluate the risks of A-PAH toxicity. Observations of retene provide evidence that A-PAHs can be more toxic and can potentially follow alternate metabolic pathways than parent compounds resulting in effects consistent with dioxin like compounds. The suggestion that A-PAHs may follow different metabolic pathways, and consequently, may have different toxic effects than parent compounds will potentially have implications in both HHRA and ERA. Human health effects associated with A-PAHs remain poorly understood. en_US
dc.description.sponsorship Intrinsik Environmental Sciences Inc. en_US
dc.language.iso en en_US
dc.rights Attribution-NoDerivs 2.5 Canada *
dc.rights.uri http://creativecommons.org/licenses/by-nd/2.5/ca/ *
dc.subject A-PAH en_US
dc.subject Risk assessment en_US
dc.subject FIsh health en_US
dc.subject Human health en_US
dc.title Alkylated polycyclic aromatic hydrocarbons in fish and risk to human health: Implications for ecological and human health risk assessements in the Alberta oil sands en_US
dc.type Major Paper en_US
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Attribution-NoDerivs 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-NoDerivs 2.5 Canada