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- W2004888049 abstract "The interaction between bitumen and quartz in aqueous solutions containing multivalent metal cations was studied with the objective of recovering residual bitumen from Athabasca oil sands froth treatment tailings. It was observed that the bitumen-quartz coagulation caused by hydrolysable multivalent metal cations (Fe3+, Fe2+, Ca2+) was reduced or prevented by complexing agents including citric acid, oxalic acid and EDTA. Citric acid was found to be the most effective among the complexing agents tested. Zeta potential measurements of quartz and bitumen at different pH suggested that the adsorption of metal species on quartz was responsible for the strong affinity of bitumen for quartz. Removal of free multivalent metal cations through complexation by organic acids was considered the principal mechanism for preventing bitumen-quartz coagulation as a consequence of increased electrostatic repulsion between bitumen and quartz." @default.
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- W2004888049 date "2007-09-01" @default.
- W2004888049 modified "2023-10-14" @default.
- W2004888049 title "Inhibiting Quartz-Bitumen Coagulation by Complexing Agents" @default.
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- W2004888049 doi "https://doi.org/10.1179/cmq.2007.46.3.207" @default.
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