Application of the Target Lipid Model and Passive Samplers to Characterize the Toxicity of Bioavailable Organics in Oil Sands Process-Affected Water

• DOI: 10.1021/acs.est.8b00614
• Publication Date: 2018-06-14T21:45:26Z
• Authors: A. D. Redman; T. F. Parkerton; J. D. Butler; D. J. Letinski; R. A. Frank; L. M. Hewitt; A. J. Bartlett; P. L. Gillis; J. R. Marentette; J. L. Parrott; S. A. Hughes; R. Guest; A. Bekele; K. Zhang; G. Morandi; S. Wiseman; J. P. Giesy
• Keywords: Organic chemicals; Polydimethylsiloxane

Oil sand operations in Alberta, Canada will eventually include returning treated process-affected waters to the environment. Organic constituents oil water (OSPW) represent complex mixtures of nonionic and ionic (e.g., naphthenic acids) compounds, compositions can vary spatially temporally, which has impeded development quality benchmarks. To address this challenge, it was hypothesized that solid phase microextraction fibers coated with polydimethylsiloxane (PDMS) could be used as a biomimetic extraction (BE) measure bioavailable organics OSPW. OSPW were assumed contribute additively toxicity, partitioning PDMS predictive accumulation target lipids, presumed site action. This method tested using toxicity data for individual model defined mixtures, organic extracted from Toxicity correlated BE data, supports use hazard assessments acute lethality aquatic organisms. A species sensitivity distribution (SSD), based on lipid values, similar SSDs residues tissues both organics. shown an analytical tool accounts bioaccumulation compound predicted, potential aid guidelines.