Search Results - "Headley, J. V."
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Chemical fingerprinting of naphthenic acids and oil sands process waters—A review of analytical methods for environmental samples
Published in Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering (2013)“…This article provides a review of the routine methods currently utilized for total naphthenic acid analyses. There is a growing need to develop chemical…”
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Symbiosis with Frankia sp. benefits the establishment of Alnus viridis ssp. crispa and Alnus incana ssp. rugosa in tailings sand from the Canadian oil sands industry
Published in Ecological engineering (01-07-2014)“…•The expanding oil sands industry in Canada produces significant volumes of tailings.•Early successional, symbiotic plant species may help revegetate…”
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Persistence of the Sulfonylurea Herbicides Thifensulfuron-Methyl, Ethametsulfuron-Methyl, and Metsulfuron-Methyl in Farm Dugouts (Ponds)
Published in Journal of environmental quality (01-11-2006)“…Sulfonylurea herbicides are applied at relatively low rates (3 to 40 g ha-1) to control weeds in a variety of crops across the Canadian prairies. Because of…”
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In Situ Bioremediation of Naphthenic Acids Contaminated Tailing Pond Waters in the Athabasca Oil Sands Region-Demonstrated Field Studies and Plausible Options: A Review
Published in Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering (01-01-2005)“…Currently, there are three industrial plants that recover oil from the lower Athabasca oil sands area, and there are plans in the future for several additional…”
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Can chronic exposure to imidacloprid, clothianidin, and thiamethoxam mixtures exert greater than additive toxicity in Chironomus dilutus?
Published in Ecotoxicology and environmental safety (30-07-2018)“…Widespread agricultural use of neonicotinoid insecticides has resulted in frequent detection of mixtures of these compounds in global surface waters. Recent…”
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Neonicotinoid insecticide mixtures: Evaluation of laboratory-based toxicity predictions under semi-controlled field conditions
Published in Environmental pollution (1987) (01-12-2018)“…Neonicotinoid insecticide mixtures are frequently detected in aquatic environments in agricultural regions. Recent laboratory studies have indicated that…”
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Sorption and metabolism of selected herbicides in river biofilm communities
Published in Canadian journal of microbiology (01-07-2001)“…In the present study, biofilms were grown in rotating annular bioreactors with river water as inoculum and sole source of nutrients. The herbicides atrazine…”
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Naphthenic acid fraction compounds reduce the reproductive success of wood frogs (Rana sylvatica) by affecting offspring viability
Published in Environmental pollution (1987) (01-01-2023)“…Understanding the toxicity of organic compounds in oil sands process-affected water (OSPW) is necessary to inform the development of environmental guidelines…”
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Preliminary fingerprinting of Athabasca oil sands polar organics in environmental samples using electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry
Published in Rapid communications in mass spectrometry (15-07-2011)“…There is a growing need to develop analytical methods that can distinguish compounds found within industrially derived oil sands process water (OSPW) from…”
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Aquatic toxicity and chemical fate of diluted bitumen spills in freshwater under natural weathering
Published in Environment international (01-08-2024)“…Increasing global demands for oils are fueling the production of diluted bitumen (DB) from Canada’s oil sands region. More weathered than conventional crude…”
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Optimization of solid-phase microextraction for the gas chromatographic–mass spectrometric determination of synthetic musk fragrances in water samples
Published in Journal of Chromatography A (15-12-2000)“…Described is a solid-phase microextraction–gas chromatography–mass spectrometric procedure for the determination of three polycyclic musk fragrances…”
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Meltwater from snow contaminated by oil sands emissions is toxic to larval fish, but not spring river water
Published in The Science of the total environment (01-06-2018)“…To assess the toxicity of winter-time atmospheric deposition in the oil sands mining area of Northern Alberta, embryo-larval fathead minnow (Pimephales…”
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A preparative method for the isolation and fractionation of dissolved organic acids from bitumen-influenced waters
Published in The Science of the total environment (25-06-2019)“…The surface mining of oil sands north of Fort McMurray, Alberta produces considerable tailings waste that is stored in large tailings ponds on industrial lease…”
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Rates of Sorption and Partitioning of Contaminants in River Biofilm
Published in Environmental science & technology (15-12-1998)“…Biofilms are believed to play a significant role in the fate and transport of contaminants in aquatic environments. However little is known about the rates of…”
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The effect of oil sands tailings pond sediments on embryo-larval walleye (Sander vitreus)
Published in Environmental pollution (1987) (01-10-2017)“…Walleye (Sander vitreus) are a commercially important North American fish species that inhabit the Athabasca River. This river flows through the Athabasca oil…”
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Is Biodegradation of Bitumen a Source of Recalcitrant Naphthenic Acid Mixtures in Oil Sands Tailing Pond Waters?
Published in Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering (01-01-2005)“…Carboxylic acids are transient metabolites during the mineralization of petroleum hydrocarbons. Crude oils, however, vary in their proportion of the…”
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The Characterization and Distribution of Inorganic Chemicals in Tributary Waters of the Lower Athabasca River, Oilsands Region, Canada
Published in Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering (01-01-2005)“…At present, there are two large industrial plants recovering oil from the lower Athabasca oil sands area and there are plans for several more mines in the…”
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Microbial Exopolymers Provide a Mechanism for Bioaccumulation of Contaminants
Published in Microbial ecology (01-05-1994)“…Scanning confocal laser microscopy was used to directly visualize accumulation of the herbicide diclofop methyl and its breakdown products by a degradative…”
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A Review of the Occurrence and Fate of Naphthenic Acids in Aquatic Environments
Published in Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering (27-12-2004)“…Naphthenic acids are comprised of a large collection of saturated aliphatic and alicyclic carboxylic acids found in hydrocarbon deposits (petroleum, oil sands…”
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