Search Results - "Dixon, D G"

Electrochemical and XPS analysis of chalcopyrite (CuFeS2) dissolution in sulfuric acid solution by Ghahremaninezhad, A., Dixon, D.G., Asselin, E.

“…► The chalcopyrite electrode was shown to be passive for potentials up to 0.90VSHE. ► Metal-deficient sulfide film passivates chalcopyrite. ► Transpassive…”
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Electrochemical evaluation of the surface of chalcopyrite during dissolution in sulfuric acid solution by Ghahremaninezhad, A., Asselin, E., Dixon, D.G.

“…The dissolution of a massive chalcopyrite electrode (98.1% chalcopyrite, 1.9% siderite) was studied in 0.5 M sulfuric acid solution. Different anodic…”
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Enhancing the kinetics of chalcopyrite leaching in the Galvanox™ process by Nazari, G., Dixon, D.G., Dreisinger, D.B.

“…Pyrite is an effective catalyst for the atmospheric leaching of chalcopyrite in iron sulfate media via the Galvanox™ process. However, not all pyrite samples…”
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Gill and liver histopathological changes in yellow perch ( Perca flavescens) and goldfish ( Carassius auratus) exposed to oil sands process-affected water by Nero, V., Farwell, A., Lister, A., Van Der Kraak, G., Lee, L.E.J., Van Meer, T., MacKinnon, M.D., Dixon, D.G.

“…The extraction of bitumen from the Athabasca oil sands (Alberta, Canada) produces significant volumes of process-affected water containing elevated levels of…”
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Effects of oil sands process-affected waters and naphthenic acids on yellow perch ( Perca flavescens) and Japanese medaka ( Orizias latipes) embryonic development by Peters, Lisa E., MacKinnon, M., Van Meer, T., van den Heuvel, M.R., Dixon, D.G.

“…Syncrude Canada Ltd. is currently developing environmentally acceptable oil sands process-affected water management methods as part of their land reclamation…”
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Reproductive and stress hormone levels in goldfish ( Carassius auratus) exposed to oil sands process-affected water by Lister, A., Nero, V., Farwell, A., Dixon, D.G., Van Der Kraak, G.

“…Athabasca oil sands mining in northern Alberta produces process-affected waters that are characterized by the presence of naphthenic acids, polycyclic aromatic…”
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Mercury biomagnification in the food web of Lake Tanganyika (Tanzania, East Africa) by Campbell, L., Verburg, Piet, Dixon, D.G., Hecky, R.E.

“…Lake Tanganyika is a globally important lake with high endemic biodiversity. Millions of people in the lake basin depend on several fish species for…”
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The effects of salinity on naphthenic acid toxicity to yellow perch: Gill and liver histopathology by Nero, V., Farwell, A., Lee, L.E.J., Van Meer, T., MacKinnon, M.D., Dixon, D.G.

“…Naphthenic acids (NAs) are naturally occurring saturated linear and cyclic carboxylic acids found in petroleum, including the bitumen contained in the…”
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The role of galena associated with silver-enhanced pyrite in the kinetics of chalcopyrite leaching during the Galvanox™ process by Nazari, G., Dixon, D.G., Dreisinger, D.B.

“…The effects of silver ions, galena, and pyrite on the kinetics of chalcopyrite leaching have been studied. In addition, the effects of galena and pyrite…”
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Chronic toxicity of arsenic, cobalt, chromium and manganese to Hyalella azteca in relation to exposure and bioaccumulation by Norwood, W.P., Borgmann, U., Dixon, D.G.

“…Chronic toxicity of As, Co, Cr and Mn to Hyalella azteca can be described using a saturation-based mortality model relative to total-body or water metal…”
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Re-evaluation of metal bioaccumulation and chronic toxicity in Hyalella azteca using saturation curves and the biotic ligand model by Borgmann, U., Norwood, W.P., Dixon, D.G.

“…Bioaccumulation by Hyalella of all metals studied so far in our laboratory was re-evaluated to determine if the data could be explained satisfactorily using…”
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Food web structure in oil sands reclaimed wetlands by Kovalenko, K. E, Ciborowski, J. J. H, Daly, C, Dixon, D. G, Farwell, A. J, Foote, A. L, Frederick, K. R, Costa, J. M. Gardner, Kennedy, K, Liber, K, Roy, M. C, Slama, C. A, Smits, J. E. G

“…Boreal wetlands play an important role in global carbon balance. However, their ecosystem function is threatened by direct anthropogenic disturbance and…”
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Kinetics of uranium uptake in soft water and the effect of body size, bioaccumulation and toxicity to Hyalella azteca by Alves, L.C., Borgmann, U., Dixon, D.G.

“…The kinetics of uptake and the effect of body size on uranium (U) bioaccumulation and toxicity to Hyalella azteca exposed to water-only U concentrations in…”
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Thermophilic heap leaching of a chalcopyrite concentrate by Petersen, J., Dixon, D.G.

“…Thermophiles have been shown to be the only micro-organisms to leach chalcopyrite successfully. Heap leaching may be a feasible alternative to conventional…”
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Interactive effects of metals in mixtures on bioaccumulation in the amphipod Hyalella azteca by Norwood, W.P., Borgmann, U., Dixon, D.G.

“…Mixtures were produced of “equi-toxic” concentrations of 10 elements at the 4-week LC25 for Hyalella azteca. Bioaccumulation was determined in 1-week…”
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Effects of Metal Mixtures on Aquatic Biota: A Review of Observations and Methods by Norwood, W.P., Borgmann, U., Dixon, D.G., Wallace, A.

“…A brief review of the historical development of metal mixture interaction analyses is presented. The two major classifications of mixture models are outlined,…”
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A Review Of Mercury in Lake Victoria, East Africa: Implications for Human and Ecosystem Health by Campbell, Linda, Dixon, D.G., Hecky, R.E.

“…Lake Victoria, East Africa, has been the site of many recent studies measuring mercury (Hg) concentrations in water, fish, sediment, soil, and humans. Most of…”
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Plant growth-promoting bacteria that decrease heavy metal toxicity in plants by Burd, G I, Dixon, D G, Glick, B R

“…Kluyvera ascorbata SUD165 and a siderophore-overproducing mutant of this bacterium, K. ascorbata SUD165/26, were used to inoculate tomato, canola, and Indian…”
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Saturation models of arsenic, cobalt, chromium and manganese bioaccumulation by Hyalella azteca by Norwood, W.P., Borgmann, U., Dixon, D.G.

“…Bioaccumulation of As, Co, Cr and Mn by the benthic amphipod Hyalella azteca in Burlington City tap (Lake Ontario) water was measured in 4-week tests…”
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Assessing the cause of impacts on benthic organisms near Rouyn-Noranda, Quebec by Borgmann, U, Nowierski, M, Grapentine, L.C, Dixon, D.G

“…Sediments from lakes near Rouyn-Noranda, Quebec, contain elevated concentrations of several metals, including Cd, Cu, Pb and Zn. Amphipods, fingernail clams,…”
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