University of Toronto, Faculty of Applied Science & Engineering

Chemical Engineering & Applied Chemistry

V. G. Papangelakis


Dipl. Eng. (Athens), M.Eng., Ph.D. (McGill)

Room: WB329
Tel.: 416-978-1093
Web site:


Canadian Institute of Mining, Metallurgy and Petroleum (CIM)
American Chemical Society (ACS)
Technical Chamber of Greece (TCE)
Hellenic Canadian Academic Association of Ontario (HCAAO)

Research Interests

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 (150-250oC) 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; and,
  • the environmental remediation of soil and water polluted from mining and metallurgical activities.

Selected Publications

M.W. Jones, V.G. Papangelakis, and J.D.T. Steyl, “Kieserite Solubility in the Aqueous FeCl3 + MgCl2 + HCl System between (338 and 378) K,” J. Chem. Eng. Data, 54 (7), 2009, pp 1986–1990.

Yunjiao Li, Ilya Perederiy, Vladimiros G. Papangelakis, “High Pressure Oxidative Acid Leaching of Nickel Smelter Slag: Characterization of Feed and Residue” Hydrometallurgy, 97 (3), 185-193, Jul 2009.

Bylina, L. Trevani, S. C. Mojumdar, P. Tremaine and V. G. Papangelakis, “Measurement of Reaction Enthalpy During Pressure Oxidation Of Sulphide Minerals,” Journal of Thermal Analysis and Calorimetry, Vol. 96 ,2009, 1, 117–124.

M. Huang and V.G. Papangelakis, "High Temperature Conductivity Measurements of Concentrated NaCl-H2SO4-H2O Solutions up to 250 °C", Ind. Eng. Chem. Res., 2009, 48, 2781–2785.

Z. Jankovic, V.G. Papangelakis and S.N. Lvov, “Effect of nickel sulphate and magnesium sulphate on pH of sulphuric acid solutions at elevated temperatures,” J. Appl. Electrochem., 39(6), 2009, 751.

Yunjiao Li, Ilya Perederiy, Vladimiros G. Papangelakis, “Cleaning of waste smelter slags and recovery of valuable metals by pressure oxidative leaching” Journal of Hazardous Materials 152, 607–615, 2008.

G. Azimi, V.G. Papangelakis and J.E. Dutrizac, “Development of an MSE-Based Chemical Model for the Solubility of Calcium Sulphate in Mixed Chloride-Sulphate Solutions,” Fluid Phase Equilibria, 266, 172-186, 2008.

M. Huang and V.G. Papangelakis, “On-Line Free Acidity Measurements of Solutions Containing Base Metals,” Canadian Metallurgical Quarterly, Special Issue, V. 47, No. 3, 2008, pp. 269-276.

M. Baghalha, V.G. Papangelakis, W. Curlook, "Factors Affecting the Leachability of Ni/Co/Cu Slags at High Temperature," Hydrometallurgy, 85, 42 – 52, 2007.

H. Ming and V.G. Papangelakis, "Electrical Conductivity of Concentrated Al2(SO4)3-MgSO4-H2SO4 Aqueous Solutions up to 250 °C", Industrial and Engineering Chemistry Research, 46, 1598 - 1604, 2007.

J. F. Adams, and V.G. Papangelakis, "Optimum Reactor Configuration for Prevention of Gypsum Scaling During Continuous Sulphuric Acid Neutralization," Hydrometallurgy, 89, 269-278, 2007.

G. Azimi, V.G. Papangelakis and J.E. Dutrizac, “Modelling of Calcium Sulphate Solubility in Concentrated Multi-Component Sulphate Solutions,” Fluid Phase Equilibria, 260, 300-315, 2007.

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