{"id":935,"date":"2015-10-05T20:32:51","date_gmt":"2015-10-06T00:32:51","guid":{"rendered":"http:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/?page_id=935"},"modified":"2022-06-09T13:34:42","modified_gmt":"2022-06-09T17:34:42","slug":"home","status":"publish","type":"page","link":"https:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/","title":{"rendered":"Home"},"content":{"rendered":"\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" width=\"1024\" height=\"124\" src=\"http:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/wp-content\/blogs.dir\/12\/files\/sites\/12\/2015\/11\/group-logo-1024x124.jpg\" alt=\"\" class=\"wp-image-952\" srcset=\"https:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/wp-content\/blogs.dir\/12\/files\/sites\/12\/2015\/11\/group-logo-1024x124.jpg 1024w, https:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/wp-content\/blogs.dir\/12\/files\/sites\/12\/2015\/11\/group-logo-300x36.jpg 300w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<div class=\"wp-block-media-text alignwide has-media-on-the-right is-stacked-on-mobile is-vertically-aligned-center\" style=\"grid-template-columns:auto 33%\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" width=\"480\" height=\"600\" src=\"https:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/wp-content\/blogs.dir\/12\/files\/sites\/12\/2022\/06\/VPG-2022.jpg\" alt=\"\" class=\"wp-image-1405 size-full\" srcset=\"https:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/wp-content\/blogs.dir\/12\/files\/sites\/12\/2022\/06\/VPG-2022.jpg 480w, https:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/wp-content\/blogs.dir\/12\/files\/sites\/12\/2022\/06\/VPG-2022-240x300.jpg 240w\" sizes=\"(max-width: 480px) 100vw, 480px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p class=\"has-text-align-left has-medium-font-size\">The Aqueous Process Engineering and Chemistry Group (APEC) was established at the University of Toronto&#8217;s Department of Chemical Engineering and Applied Chemistry in 1992, under the leadership of <a href=\"https:\/\/chem-eng.utoronto.ca\/faculty-staff\/faculty-members\/vladimiros-g-papangelakis\/\" data-type=\"URL\" data-id=\"https:\/\/chem-eng.utoronto.ca\/faculty-staff\/faculty-members\/vladimiros-g-papangelakis\/\">Professor Vladimiros G. Papangelakis<\/a><\/p>\n<\/div><\/div>\n\n\n\n<h3><strong>Mission Statement<\/strong><\/h3>\n\n\n\n<p>Our&nbsp;group focuses on developing novel sustainable processes and environmentally responsible solutions for&nbsp;the metals\/minerals industry by studying the fundamentals of aqueous industrial processes.<\/p>\n\n\n\n<h3><strong>Core Values<\/strong><\/h3>\n\n\n\n<p>Our research approaches include:<\/p>\n\n\n\n<ul><li>Thorough study of the underlying chemistry of the process under investigation and precision in design and conduct of experimental work while maintaining close connection between theoretical and practical aspects;<\/li><li>Highest standards of reporting research results;<\/li><li>Respect for deadlines.<\/li><\/ul>\n\n\n\n<h3><strong>Areas of expertise<\/strong><\/h3>\n\n\n\n<ul><li>Aqueous process engineering<\/li><li>Chemical process metallurgy<\/li><li>Hydrometallurgy<\/li><li>Process modelling<\/li><li>Electrolyte solution chemistry<\/li><li>Mineral-water interfaces<\/li><li>Recycling of inorganic wastes<\/li><li>Environmental remediation from mining and metallurgical activities.<\/li><\/ul>\n\n\n\n<h3><strong>Main Areas of Research<\/strong><\/h3>\n\n\n\n<ul><li>Industrial water chemistry;<\/li><li>Hydrometallurgy and bio-hydrometallurgy;<\/li><li>Chemical modeling of electrolyte systems via OLI\u2122 software;<\/li><li>Scale abatement in industrial reactors;<\/li><li>Focus metals: nickel, cobalt, gold, calcium, magnesium, rare earths (lanthanides);<\/li><li>Recycling and cleaning of inorganic wastes;<\/li><li>Development of industrial sensors for acid and redox monitoring at low and high temperature.<\/li><\/ul>\n\n\n\n<p>For a more in-depth look at our research interests and achievements, please consult the &#8220;Projects&#8221; page.<\/p>\n\n\n\n<h3><strong>Selected Publications<\/strong><\/h3>\n\n\n\n<ol><li><span lang=\"en-US\">Eric Shum, Vladimiros G. Papangelakis, \u201cWater Recovery from Inorganic Solutions via Natural Freezing and Melting,\u201d Journal of Water Process Engineering, <\/span><a title=\"Go to table of contents for this volume\/issue\" href=\"https:\/\/www.sciencedirect.com\/science\/journal\/22147144\/31\/supp\/C\" target=\"_blank\" rel=\"noopener noreferrer\" data-auth=\"NotApplicable\"><span lang=\"en-US\">Volume 31<\/span><\/a><span lang=\"en-US\">,&nbsp;October 2019, 100787,&nbsp;<\/span><a title=\"Persistent link using digital object identifier\" href=\"https:\/\/doi.org\/10.1016\/j.jwpe.2019.100787\" target=\"_blank\" rel=\"noopener noreferrer\" data-auth=\"NotApplicable\"><span lang=\"en-US\">doi.org\/10.1016\/j.jwpe.2019.100787<\/span><\/a><\/li><li>Georgios Kolliopoulos, Jeffrey T. Martin, Vladimiros G. Papangelakis, \u201cEnergy Requirements in the Separation-Regeneration Step in Forward Osmosis Using TMA-CO<sub>2<\/sub>-H<sub>2<\/sub>O as the Draw Solution,\u201d Chemical Engineering Research and Design, 140 (2018), 166\u2013174<\/li><li>Georgios Kolliopoulos and Vladimiros G. Papangelakis, \u201cTemperature and Pressure Effects on the Separation Efficiency and Desorption Kinetics in the TMA-CO<sub>2<\/sub>-H<sub>2<\/sub>O System,\u201d Ind. Eng. Chem. Res. 2018, 57, 14767\u221214773,<a href=\"http:\/\/dx.doi.org\/10.1021\/acs.iecr.8b03926\" target=\"_blank\" rel=\"noopener noreferrer\" data-auth=\"NotApplicable\">http:\/\/dx.doi.org\/10.1021\/acs.iecr.8b03926<\/a><\/li><li><span lang=\"en-US\">Georgios Kolliopoulos, Eric Shum, and Vladimiros G. Papangelakis, \u201cForward Osmosis and Freeze Crystallization as Low Energy Water Recovery Processes for a Water-Sustainable Industry,\u201d&nbsp;<\/span>Environ. Process. (2018).<a href=\"https:\/\/doi.org\/10.1007\/s40710-018-0316-5\" target=\"_blank\" rel=\"noopener noreferrer\" data-auth=\"NotApplicable\">https:\/\/doi.org\/10.1007\/s40710-018-0316-5<\/a><\/li><li><span lang=\"en-US\">Georgios Kolliopoulos, Amy M. Holland, and Vladimiros G. Papangelakis, \u201cModeling of Density and Electrical Conductivity of Aqueous Carbonated Trimethylamine (TMA-CO<sub>2<\/sub>-H<sub>2<\/sub>O) Solutions at 20 \u00b0C,\u201d Monatshefte f\u00fcr Chemie \u2013 Chemical Monthly, 2017,&nbsp;<\/span><a href=\"https:\/\/doi.org\/10.1007\/s00706-017-2091-9\" target=\"_blank\" rel=\"noopener noreferrer\" data-auth=\"NotApplicable\"><span lang=\"en-US\">https:\/\/doi.org\/10.1007\/s00706-017-2091-9<\/span><\/a><\/li><li>Igor Guzman, Steven J. Thorpe &amp; Vladimiros G. Papangelakis (2017): Redox potential measurement during pressure oxidation (POX) of a refractory gold ore, Canadian Metallurgical Quarterly, DOI: 10.1080\/00084433.2017.1386363<\/li><li>Srinath Garg, Kurtis Judd, Radhakrishnan Mahadevan, Elizabeth Edwards &amp; Vladimiros G. Papangelakis (2017) Leaching characteristics of nickeliferous pyrrhotite tailings from the Sudbury, Ontario area, Canadian Metallurgical Quarterly, 56:4, 372-381, DOI: 10.1080\/00084433.2017.1361162<\/li><li>Igor Guzman, Steven J. Thorpe, Vladimiros G. Papangelakis, \u201cRedox potential measurements in the H<span lang=\"en-US\"><sub>2<\/sub><\/span>SO<span lang=\"en-US\"><sub>4<\/sub><\/span>-FeSO<span lang=\"en-US\"><sub>4<\/sub><\/span>-Fe<span lang=\"en-US\"><sub>2<\/sub><\/span>(SO<span lang=\"en-US\"><sub>4<\/sub><\/span>)<span lang=\"en-US\"><sub>3<\/sub><\/span>-H<span lang=\"en-US\"><sub>2<\/sub><\/span>O system at high temperature using an Ir electrode,\u201d Journal of Electroanalytical Chemistry, 799 (2017), 399-405.<\/li><li>Srinath Garg, Vladimiros Papangelakis, Elizabeth Edwards, Radhakrishnan Mahadevan, \u201cApplication of a Selective Dissolution Protocol to Quantify the Terminal Dissolution Extents of Pyrrhotite and Pentlandite From Pyrrhotite Tailings,\u201d International Journal of Mineral Processing, 158 (2017), 27-34.<\/li><li>Georgios Kolliopoulos, Michael Carlos, Timothy J. Clark, Amy M. Holland, Ding-Yu Peng, Vladimiros G. Papangelakis, \u201cChemical Modeling of the TMA-CO<span lang=\"en-US\"><sub>2<\/sub><\/span>-H<span lang=\"en-US\"><sub>2<\/sub><\/span>O System: A Draw Solution in Forward Osmosis for Process Water Recovery,\u201d Journal of Chemical and Engineering Data, 62(4), 1214-1222, 2017, DOI:&nbsp;10.1021\/acs.jced.6b00780<\/li><li>Ilya Perederiy and Vladimiros G. Papangelakis, \u201cWhy amorphous FeO-SiO<span lang=\"en-US\"><sub>2<\/sub><\/span>&nbsp;slags do not acid-leach at high temperatures,\u201d Journal of Hazardous Materials, 321 (2017), 737-744<\/li><li>Georgiana Moldoveanu and Vladimiros Papangelakis, \u201cAn overview of rare earth recovery by ion exchange leaching from ion-adsorption clays of various origins,\u201d Mineralogical Magazine, 80(1), 63-76, 2016.<\/li><li>Nazanin Samadifard, Cheryl E. Devine, Elizabeth Edwards, Krishna Mahadevan, and Vladimiros G. Papangelakis, \u201cFerric sulphate leaching of pyrrhotite tailings between 30 to 55 \u00b0C,\u201d Minerals, 5 (2015), 801\u2013814; doi:10.3390\/min5040526<\/li><li>Georgiana A. Moldoveanu and Vladimiros G. Papangelakis, &#8220;Effects of thermal pre-treatment and ore dryness on the recovery of lanthanides from ion-adsorption clays&#8221;, Hydrometallurgy, 158 (2015), 180-185.<\/li><li>Georgiana A. Moldoveanu and Vladimiros G. Papangelakis, &#8220;Strategies for calcium sulphate scale control in hydrometallurgical processes at 80 \u00b0C&#8221;, Hydrometallurgy, 157 (2015). &nbsp;133-139.<\/li><li><span style=\"font-family: Helvetica\">G.A. Moldoveanu, V.G. Papangelakis, \u201cRecovery of rare earth elements adsorbed on clay minerals: II. Leaching with Ammonium Sulphate,\u201d Hydrometallurgy, 131-132 (2013), 158-166.<\/span><\/li><li>Georgiana A. Moldoveanu, Vladimiros G. Papangelakis, \u201cRecovery of rare earth elements adsorbed on clay minerals: I. Desorption mechanism,\u201d Hydrometallurgy 117<b>\u2013<\/b>118 (2012) 71<b>\u2013<\/b>78.<\/li><li>I.V. Bylina, S.C. Mojumdar, V.G. Papangelakis, \u201cEffect of storage time on the pressure oxidation enthalpy of pyrite,\u201d Journal of Thermal Analysis and Calorimetry (2012): 1-7, April 06, 2012.<\/li><li>Ilya Perederiy, V. G. Papangelakis, Mohamed Buarzaiga, Indje Mihaylov, \u201cCo-treatment of converter slag and pyrrhotite tailings via high pressure oxidative leaching,\u201d Journal of Hazardous Materials, 194 (2011), 399\u2013406.<\/li><li>G. Azimi, V.G. Papangelakis, \u201cMechanism and Kinetics of&nbsp;gypsum-anhydrite transformation in Aqueous Electrolyte Solutions,\u201d Hydrometallurgy, 108 (2011),&nbsp;<img loading=\"lazy\" src=\"https:\/\/r3.res.outlook.com\/owa\/14.16.335.0\/themes\/resources\/clear1x1.gif\" alt=\"Description: http:\/\/www.sciencedirect.com\/scidirimg\/clear.gif\" width=\"3\" height=\"12\" border=\"1\">122-129.<\/li><li>R.J. Mathew, V.G. Papangelakis, E. Guerra, \u201cInterfacial phenomena in the sulphur-polytetrafluoroethylene system under hydrothermal conditions,\u201d Minerals Engineering, 23 (2010) 1113-1119.<\/li><li>Z. Jankovic, V.G. Papangelakis, \u201cMeasurement of pH in high-temperature nickel laterite pressure acid leach process solutions, Hydrometallurgy 105 (2010), 155-160.<\/li><li>G. Azimi, V.G. Papangelakis, \u201cSolubility of gypsum and anhydrite in simulated laterite pressure acid leach solutions up to 250\u00b0C,\u201d Hydrometallurgy, 102, 1\u201313, 2010.<\/li><li>D. Georgiou, V. G. Papangelakis, \u201cBehaviour of cobalt during sulphuric acid pressure leaching of a limonitic laterite,\u201d Hydrometallurgy, 100, 35\u201340, 2009.<\/li><li>G. Azimi, V.G. Papangelakis, \u201cThermodynamic modeling and experimental measurement of calcium sulfate in complex aqueous solutions,\u201d Fluid Phase Equilibria,&nbsp;290, 88\u201394,&nbsp;2010.<\/li><li>G. Azimi, V.G. Papangelakis, and J.E. Dutrizac, \u201cDevelopment of a Chemical Model for the Solubility of Calcium Sulphate in Zinc Processing Solutions,\u201d Canadian Metallurgical Quarterly,&nbsp;Vol. 49 (1), 2010.<\/li><li>D. Georgiou, V. G. Papangelakis, \u201cBehaviour of cobalt during sulphuric acid pressure leaching of a limonitic laterite,\u201d Hydrometallurgy, 100, 35\u201340, 2009.<\/li><li>M.W. Jones, V.G. Papangelakis, and J.D.T. Steyl, \u201cKieserite Solubility in the Aqueous FeCl<sub>3<\/sub>&nbsp;+ MgCl<sub>2<\/sub>&nbsp;+ HCl System between (338 and 378) K,\u201d J. Chem. Eng. Data,&nbsp;<i>54<\/i>&nbsp;(7), 2009, pp 1986\u20131990.<\/li><li>Z. Jankovic, V.G. Papangelakis and S.N. Lvov, \u201cEffect of nickel sulphate and magnesium sulphate on pH of sulphuric acid solutions at elevated temperatures,\u201d J. Appl. Electrochem., 39(6), 2009, 751.<\/li><li>M. Huang and V.G. Papangelakis, &#8220;High Temperature Conductivity Measurements of&nbsp; Concentrated NaCl-H<sub>2<\/sub>SO<sub>4<\/sub>-H<sub>2<\/sub>O Solutions up to 250 \u00b0C&#8221;, Ind. Eng. Chem. Res., 2009, 48, 2781\u20132785.<\/li><li>I. Bylina, L. Trevani, S. C. Mojumdar, P. Tremaine and V. G. Papangelakis, \u201cMeasurement of Reaction Enthalpy During Pressure Oxidation Of Sulphide Minerals,\u201d Journal of Thermal Analysis and Calorimetry, Vol. 96 ,2009, 1, 117\u2013124.<\/li><li>Yunjiao Li, Ilya Perederiy, Vladimiros G. Papangelakis, \u201cHigh Pressure Oxidative Acid Leaching of Nickel Smelter&nbsp;Slag: Characterization of Feed and Residue\u201d Hydrometallurgy,&nbsp;97 (3), 185-193, Jul 2009.<\/li><li>M. Huang and V.G. Papangelakis, \u201cOn-Line Free Acidity Measurements of Solutions Containing Base Metals,\u201d Canadian Metallurgical Quarterly, Special Issue, V. 47, No. 3, 2008, pp. 269-276.<\/li><li>G. Azimi, V.G. Papangelakis and J.E. Dutrizac, \u201cDevelopment of an MSE-Based Chemical Model for the Solubility of Calcium Sulphate in Mixed Chloride-Sulphate Solutions,\u201d Fluid Phase Equilibria, 266, 172-186, 2008.<\/li><li>Yunjiao Li, Ilya Perederiy, Vladimiros G. Papangelakis, \u201cCleaning of waste smelter slags and recovery of valuable metals by pressure oxidative leaching\u201d Journal of Hazardous Materials 152, 607\u2013615, 2008.<\/li><li>G. Azimi, V.G. Papangelakis and J.E. Dutrizac, \u201cModelling of Calcium Sulphate Solubility in Concentrated Multi-Component Sulphate Solutions,\u201d Fluid Phase Equilibria, 260, 300-315, 2007.<\/li><li>J. F. Adams, and V.G. Papangelakis, &#8220;Optimum Reactor Configuration for Prevention of Gypsum Scaling During Continuous Sulphuric Acid Neutralization,&#8221; Hydrometallurgy, 89, 269-278, 2007.<\/li><li>H. Ming and V.G. Papangelakis, &#8220;Electrical Conductivity of Concentrated Al2(SO4)3-MgSO4-H2SO4 Aqueous Solutions up to 250 \u00b0C&#8221;, Industrial and Engineering Chemistry Research, 46, 1598 &#8211; 1604, 2007.<\/li><li>M. Baghalha, V.G. Papangelakis, W. Curlook, &#8220;Factors Affecting the Leachability of Ni\/Co\/Cu Slags at High Temperature,&#8221; Hydrometallurgy, 85, 42 \u2013 52, 2007.<\/li><\/ol>\n","protected":false},"excerpt":{"rendered":"<p>The Aqueous Process Engineering and Chemistry Group (APEC) was established at the University of Toronto&#8217;s Department of Chemical Engineering and Applied Chemistry in 1992, under the leadership of Professor Vladimiros G. Papangelakis Mission Statement Our&nbsp;group focuses on developing novel sustainable &hellip; <a href=\"https:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":14,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_links_to":"","_links_to_target":""},"_links":{"self":[{"href":"https:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/wp-json\/wp\/v2\/pages\/935"}],"collection":[{"href":"https:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/wp-json\/wp\/v2\/users\/14"}],"replies":[{"embeddable":true,"href":"https:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/wp-json\/wp\/v2\/comments?post=935"}],"version-history":[{"count":13,"href":"https:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/wp-json\/wp\/v2\/pages\/935\/revisions"}],"predecessor-version":[{"id":1406,"href":"https:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/wp-json\/wp\/v2\/pages\/935\/revisions\/1406"}],"wp:attachment":[{"href":"https:\/\/www.labs.chem-eng.utoronto.ca\/aqueous\/wp-json\/wp\/v2\/media?parent=935"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}