University of Toronto
Department of Chemical Engineering and Applied Chemistry

Dr. Vladimiros G. Papangelakis

Professor, AqueousPEC Group Leader

 

Department of Chemical Engineering & Applied Chemistry
University of Toronto
200 College Street, Toronto, Ontario, Canada M5S 3E5
Tel: (416) 978-1093
Fax: (416) 978-8605
e-mail: papange*AT*chem-eng.utoronto.ca

AQUEOUS AND ENVIRONMENTAL PROCESS ENGINEERING

 

Aqueous processes are employed in the winning-of-metals industry (hydrometallurgy) and are continuously gaining interest in the world metal extraction industry. Intelligent application of water chemistry on earthy natural resources (ores and minerals) can meet the ever-increasing requirements for clean environment, product quality, and low processing cost.

 

Research efforts are currently aiming at understanding the chemistry of low and high temperature (150-250(C) electrolyte solutions, identifying the kinetics of selected aqueous processes as well as developing descriptive models suitable for computer-aided simulation of the steady-state and transient performance of industrial reactors. Our efforts also focus on the mineral-water interfacial chemistry, the mobility of metal ions across this interface, and the chemical behaviour of concentrated aqueous solutions.

 

Specific projects reflect the synthesis of various research elements including:

  • the development of novel sensors (pH, spectrophotometry, conductivity) for in-situ analysis of high-temperature process solutions
  • the thermodynamic study of ionic solutions at room and elevated temperatures
  • the mathematical modelling of particulate multi-phase and multi-stage continuous reactors employing the "Population Balance" approach
  • the environmental remediation of soil and water polluted from mining and metallurgical activities

 

Selected Publications

 

D. S. Seneviratne, V. G. Papangelakis, Z. Yankovic, X. Y. Zhou and S. N., Lvov, "pH Measurement in High - Temperature Hydrometallurgical Systems", Hydrometallurgy 2003, Proceedings of the 5th International Symposium Honoring Professor Ian M. Ritchie v.1, (eds. C. Young, A. Alfantazi, C. Anderson, A. James, D. Dreisinger and B. Harris), TMS, Warrendale, PA 645 - 656, 2003.

 

J.F. Adams and V.G Papangalakis, "Gypsum Fouling in Neutralization Reactors and Aqueous Streams", Hydrometallurgy 2003, Proceedings of the 5th International Symposium Honoring Professor Ian M. Ritchie v.2, (eds. C. Young, A. Alfantazi, C. Anderson, A. James, D. Dreisinger and B. Harris), TMS, Warrendale, PA 1741 - 1753, 2003.

 

H. Liu, V.G. Papangelakis, M.S. Alam, and G. Singh, "Solubility of Hematite in H2SO4 Solution at 230-270°C", Canadian Metallurgical Quarterly , 42(2), 199 - 208, 2003.

 

D. S. Seneviratne, V. G. Papangelakis, X. Y. Zhou and S. N., Lvov, "Potentiometric pH measurements in acidic sulfate solutions at 250C relevant to pressure leaching", Hydrometallurgy, 68, 131-139, 2003

 

J. Kambossos, M. Baghalha, V.G Papangalakis, M. Buarzaiga and Boissoneault, "Laterite Scale Formation and Dissolution in Chloride Solutions", Chloride Metallurgy 2002, (eds. E. Peek and G. Van Weert), CIM, Montreal, 373 - 388, 2002.

 

J.F. Adams and V.G. Papangelakis, "Understanding Gypsum Crystallization Fouling in Sulphuric Acid Neutralization Reactors", Gypsum and Fly Ash 2002, Process Ortech Inc., Toronto, Canada, 4-1 - 4-15, 2002.

 

J.F. Adams and V.G. Papangelakis, "Gypsum Scale Formation in Continuous Neutralization Reactors", Canadian Metallurgical Quarterly, 39 (4), 421-432, 2000.

 

D.H. Rubisov and V.G. Papangelakis, "Sulphuric Acid Pressure Leaching of Laterites - a Comprehensive Model of a Continuous Autoclave" Hydrometallurgy , 58(2), 89-101, 2000.

 

D.H. Rubisov, J.M. Krowinkel and V.G. Papangelakis, "Sulphuric Acid Pressure Leaching of Laterites - Universal Kinetics of Nickel Dissolution for Limonites and Limonitic/Saprolitic Blends", Hydrometallurgy, 58(1), 1-11, 2000.

 

D.H. Rubisov and V.G. Papangelakis, "Sulphuric Acid Pressure Leaching of Laterites - Speciation and Prediction of Metal Solubilities 'at Temperature'", Hydrometallurgy, 58(1), 13-26, 2000.

 

M. Baghalha and V.G. Papangelakis, "High-Temperature Conductivity Measurements for Industrial Applications. 1. A New Cell", Ind. Eng. Chem. Res., 39, pp. 3640-3645, 2000.

 

M. Baghalha and V.G. Papangelakis, "High-Temperature Conductivity Measurements for Industrial Applications. 2. H2SO4-Al2(SO4)3 Solutions", Ind. Eng. Chem. Res., 39, pp. 3646-3652, 2000.

 

D.H. Rubisov and V.G. Papangelakis, "The Effect of Acidity 'at Temperature' on the Morphology of Precipitates and Scale during Sulphuric Acid Pressure Leaching of Laterites", CIM Bulletin, 93(1041) 131-137, 2000.