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Publications: Senanayake, Gamini

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Journal Article

Das, S., Behera, S.S., Murmu, B.M., Mohapatra, R.K., Mandal, D., Samantray, R., Parhi, P.K. and Senanayake, G. (2018) Extraction of Scandium (III) from acidic solutions using organo-phosphoric acid reagents: A comparative study. Separation and Purification Technology, 202 . pp. 248-258.

Makuei, F.M. and Senanayake, G. (2018) Extraction of tellurium from lead and copper bearing feed materials and interim metallurgical products – A short review. Minerals Engineering, 115 . pp. 79-87.

Kianinia, Y., Hnědkovský, L., Senanayake, G., Akilan, C., Khalesi, M.R., Abdollahy, M., Darban, A.K. and Hefter, G. (2018) Heat Capacities of Aqueous Solutions of K4Fe(CN)6, K3Fe(CN)6, K3Co(CN)6, K2Ni(CN)4, and KAg(CN)2 at 298.15 K. Journal of Chemical & Engineering Data, 63 (5). pp. 1773-1779.

Kianinia, Y., Khalesi, M., Abdollahy, M., Hefter, G., Senanayake, G., Hnědkovský, L., Khodadadi Darban, A. and Shahbazi, M. (2018) Predicting cyanide consumption in gold leaching: A kinetic and thermodynamic modeling approach. Minerals, 8 (3).

Demol, J., Ho, E. and Senanayake, G. (2018) Sulfuric acid baking and leaching of rare earth elements, thorium and phosphate from a monazite concentrate: Effect of bake temperature from 200 to 800 °C. Hydrometallurgy, 179 . pp. 254-267.

Sitando, O., Senanayake, G., Dai, X., Nikoloski, A.N. and Breuer, P. (2018) A review of factors affecting gold leaching in non-ammoniacal thiosulfate solutions including degradation and in-situ generation of thiosulfate. Hydrometallurgy, 178 . pp. 151-175.

Le, M.N., Lee, M.S. and Senanayake, G. (2018) A short review of the separation of iridium and rhodium from hydrochloric acid solutions by solvent extraction. Journal of Solution Chemistry . In Press.

Senanayake, G. and Muir, D.M. (2017) Erratum to “Studies on the liquid junction potential corrections of electrolytes at aqueous + mixed solvent boundaries” [J. Electroanal. Chem., 237 (1987) 149–162]. Journal of Electroanalytical Chemistry, 808 . p. 474.

Samal, R., Dash, B., Sarangi, C., Sanjay, K., Subbaiah, T., Senanayake, G. and Minakshi, M. (2017) Influence of synthesis temperature on the growth and surface morphology of Co3O4 Nanocubes for supercapacitor applications. Nanomaterials, 7 (11).

Truong, H.T., Lee, M.S. and Senanayake, G. (2017) Separation of Pt(IV), Rh(III) and Fe(III) in acid chloride leach solutions of glass scraps by solvent extraction with various extractants. Hydrometallurgy . In Press.

Burtt, C.M. and Senanayake, G. (2016) Effect of reductants and stabilizers on ageing of gold nanoparticles at pH2–12 and application of nano-gold to study non-cyanide leaching in sodium hypochlorite/chloride solutions using UV–Visible spectroscopy. Hydrometallurgy, 164 . pp. 166-176.

Thompson, G., Churach, D., Seymour, K., Senanayake, G., Nikoloski, A., Kelly, S. and Avraamides, J. (2016) Minerals education in high schools in Western Australia – A Rio Tinto initiative. AusIMM Bulletin (2).

Stone, K., Bandara, A.M.T.S., Senanayake, G. and Jayasekera, S. (2016) Processing of rare earth phosphate concentrates: A comparative study of pre-leaching with perchloric, hydrochloric, nitric and phosphoric acids and deportment of minor/major elements. Hydrometallurgy, 163 . pp. 137-147.

Senanayake, G., Jayasekera, S., Bandara, A.M.T.S., Königsberger, E., Königsberger, L.C. and Kyle, J. (2016) Rare earth metal ion solubility in sulphate-phosphate solutions of pH range −0.5 to 5.0 relevant to processing fluorapatite rich concentrates: Effect of calcium, aluminium, iron and sodium ions and temperature up to 80°C. Minerals Engineering, 98 . pp. 169-176.

Joo, S-H, Shin, D.J., Oh, C.H., Wang, J-P, Senanayake, G. and Shin, S.M. (2016) Selective extraction and separation of nickel from cobalt, manganese and lithium in pre-treated leach liquors of ternary cathode material of spent lithium-ion batteries using synergism caused by Versatic 10 acid and LIX 84-I. Hydrometallurgy, 159 . pp. 65-74.

Hans, R., Senanayake, G., Dharmasiri, L.C.S., Mathes, J.A.P. and Kim, D.J. (2016) A preliminary batch study of sorption kinetics of Cr(VI) ions from aqueous solutions by a magnetic ion exchange (MIEX®) resin and determination of film/pore diffusivity. Hydrometallurgy, 164 . pp. 208-218.

Zhang, X.M. and Senanayake, G. (2016) A review of ammoniacal thiosulfate leaching of gold: An update useful for further research in Non-cyanide gold lixiviants. Mineral Processing and Extractive Metallurgy Review, 37 (6). pp. 385-411.

Bandara, A.M.T.S. and Senanayake, G. (2015) Leachability of rare-earth, calcium and minor metal ions from natural Fluorapatite in perchloric, hydrochloric, nitric and phosphoric acid solutions: Effect of proton activity and anion participation. Hydrometallurgy, 153 . pp. 179-189.

Delgado, D., Minakshi, M., Senanayake, G. and Kim, D-J (2015) Modified electrolytic manganese dioxide (MEMD) for oxygen generation in alkaline medium. Journal of Solid State Electrochemistry, 19 (4). pp. 1133-1142.

Senanayake, G., Das, G.K., de Lange, A., Li, J. and Robinson, D.J. (2015) Reductive atmospheric acid leaching of lateritic smectite/nontronite ores in H2SO4/Cu(II)/SO2 solutions. Hydrometallurgy, 152 . pp. 44-54.

Yin, C-Y, Ng, M-F, Saunders, M., Goh, B.M., Senanayake, G., Sherwood, A. and Hampton, M. (2014) New insights into the adsorption of aurocyanide ion on activated carbon surface: Electron microscopy analysis and computational studies using fullerene-like models. Langmuir, 30 (26). pp. 7703-7709.

Parhi, P.K., Park, K.H. and Senanayake, G. (2013) A kinetic study on hydrochloric acid leaching of nickel from Ni–Al2O3 spent catalyst. Journal of Industrial and Engineering Chemistry, 19 (2). pp. 589-594.

Senanayake, G. (2012) Gold leaching by copper(II) in ammoniacal thiosulphate solutions in the presence of additives. Part I: A review of the effect of hard–soft and Lewis acid-base properties and interactions of ions. Hydrometallurgy, 115-116 . pp. 1-20.

Senanayake, G. and Zhang, X.M. (2012) Gold leaching by copper(II) in ammoniacal thiosulphate solutions in the presence of additives. Part II: Effect of residual Cu(II), pH and redox potentials on reactivity of colloidal gold. Hydrometallurgy, 115-116 . pp. 21-29.

Senanayake, G. (2011) Acid leaching of metals from deep-sea manganese nodules – A critical review of fundamentals and applications. Minerals Engineering, 24 (13). pp. 1379-1396.

Poinern, G.E.J., Senanayake, G., Shah, N., Thi-Le, X.N., Parkinson, G.M. and Fawcett, D. (2011) Adsorption of the aurocyanide, complex on granular activated carbons derived from macadamia nut shells – A preliminary study. Minerals Engineering, 24 (15). pp. 1694-1702.

Nam, Y.I., Seo, S.Y., Kang, Y-C, Kim, M.J., Senanayake, G. and Tran, T. (2011) Purification of molybdenum trioxide calcine by selective leaching of copper with HCl–NH4Cl. Hydrometallurgy, 109 (1-2). pp. 9-17.

Senanayake, G., Childs, J., Akerstrom, B.D. and Pugaev, D. (2011) Reductive acid leaching of laterite and metal oxides — A review with new data for Fe(Ni,Co)OOH and a limonitic ore. Hydrometallurgy, 110 (1-4). pp. 13-32.

Senanayake, G., Shin, S-M., Senaputra, A., Winn, A., Pugaev, D., Avraamides, J., Sohn, J-S. and Kim, D-J. (2010) Comparative leaching of spent zinc-manganese-carbon batteries using sulfur dioxide in ammoniacal and sulfuric acid solutions. Hydrometallurgy, 105 (1-2). pp. 36-41.

Senanayake, G., Senaputra, A. and Nicol, M.J. (2010) Effect of thiosulfate, sulfide, copper(II), cobalt(II)/(III) and iron oxides on the ammoniacal carbonate leaching of nickel and ferronickel in the Caron process. Hydrometallurgy, 105 (1-2). pp. 60-68.

Kang, J., Sohn, J., Chang, H., Senanayake, G. and Shin, S.M. (2010) Preparation of cobalt oxide from concentrated cathode material of spent lithium ion batteries by hydrometallurgical method. Advanced Powder Technology, 21 (2). pp. 175-179.

Kang, J., Senanayake, G., Sohn, J. and Shin, S.M. (2010) Recovery of cobalt sulfate from spent lithium ion batteries by reductive leaching and solvent extraction with Cyanex 272. Hydrometallurgy, 100 (3-4). pp. 168-171.

Park, Y.Y., Tran, T., Lee, Y.H., Nam, Y.I., Senanayake, G. and Kim, M.J. (2010) Selective removal of arsenic(V) from a molybdate plant liquor by precipitation of magnesium arsenate. Hydrometallurgy, 104 (2). pp. 290-297.

Kim, T-H, Senanayake, G., Kang, J-G., Sohn, J-S., Rhee, K-I., Lee, S-W. and Shin, S-M. (2009) Reductive acid leaching of spent zinc–carbon batteries and oxidative precipitation of Mn–Zn ferrite nanoparticles. Hydrometallurgy, 96 (1-2). pp. 154-158.

Shin, S.M., Senanayake, G., Sohn, J-S, Kang, J-G, Yang, D-H and Kim, T-H (2009) Separation of zinc from spent zinc-carbon batteries by selective leaching with sodium hydroxide. Hydrometallurgy, 96 (4). pp. 349-353.

Senanayake, G. (2009) A review of chloride assisted copper sulfide leaching by oxygenated sulfuric acid and mechanistic considerations. Hydrometallurgy, 98 (1-2). pp. 21-32.

Senanayake, G. (2008) Erratum to “Chloride assisted leaching of chalcocite by oxygenated sulphuric acid via Cu(II)–OH–Cl” [Miner. Eng. 20 (2007) 1075–1088]. Minerals Engineering, 21 (5). p. 421.

Senanayake, G. (2008) A review of effects of silver, lead, sulfide and carbonaceous matter on gold cyanidation and mechanistic interpretation. Hydrometallurgy, 90 (1). pp. 46-73.

Senanayake, G. (2007) Review of theory and practice of measuring proton activity and pH in concentrated chloride solutions and application to oxide leaching. Minerals Engineering, 20 (7). pp. 634-645.

Senanayake, G. (2007) Review of rate constants for thiosulphate leaching of gold from ores, concentrates and flat surfaces: Effect of host minerals and pH (Review). Minerals Engineering, 20 (1). pp. 1-15.

Senanayake, G. (2007) Chloride assisted leaching of chalcocite by oxygenated sulphuric acid via Cu(II)–OH–Cl. Minerals Engineering, 20 (11). pp. 1075-1088.

Avraamides, J., Senanayake, G. and Clegg, R. (2006) Sulfur dioxide leaching of spent zinc–carbon-battery scrap. Journal of Power Sources, 159 (2). pp. 1488-1493.

Senanayake, G. (2006) The cyanidation of silver metal: Review of kinetics and reaction mechanism. Hydrometallurgy, 81 (2). pp. 75-85.

Senanayake, G. (2005) Catalytic role of ammonia in the anodic oxidation of gold in copper-free thiosulfate solutions. Hydrometallurgy, 77 (3-4). pp. 287-293.

Senanayake, G. (2005) Gold leaching by thiosulphate solutions: a critical review on copper(II)–thiosulphate–oxygen interactions. Minerals Engineering, 18 (10). pp. 995-1009.

Perera, W.N., Senanayake, G. and Nicol, M.J. (2005) Interaction of gold(I) with thiosulfate–sulfite mixed ligand systems. Inorganica Chimica Acta, 358 (7). pp. 2183-2190.

Senanayake, G. (2005) Kinetic model for anodic oxidation of gold in thiosulfate media based on the adsorption of MS2O3− ion-pair. Hydrometallurgy, 76 (3-4). pp. 233-238.

Senanayake, G. (2005) Kinetics and reaction mechanism of gold cyanidation: Surface reaction model via Au(I)–OH–CN complexes. Hydrometallurgy, 80 (1-2). pp. 1-12.

Senanayake, G. (2005) Role of copper(II), carbonate and sulphite in gold leaching and thiosulphate degradation by oxygenated alkaline non-ammoniacal solutions. Minerals Engineering, 18 (4). pp. 409-426.

Senanayake, G. (2005) The role of ligands and oxidants in thiosulfate leaching of gold. Gold Bulletin, 38 (4). pp. 170-179.

Senanayake, G. (2005) A surface adsorption/reaction mechanism for gold oxidation by copper(II) in ammoniacal thiosulfate solutions. Journal of Colloid and Interface Science, 286 (1). pp. 253-257.

Perera, W.N. and Senanayake, G. (2004) The Ammonia, Thiosulfato, and Mixed Ammonia/Thiosulfato Complexes of Silver(I) and Gold(I). ChemInform, 35 (31).

Senanayake, G. (2004) Analysis of reaction kinetics, speciation and mechanism of gold leaching and thiosulfate oxidation by ammoniacal copper(II) solutions. Hydrometallurgy, 75 (1-4). pp. 55-75.

Senanayake, G. (2004) Gold leaching in non-cyanide lixiviant systems: critical issues on fundamentals and applications. Minerals Engineering, 17 (6). pp. 785-801.

Perera, W.N. and Senanayake, G. (2004) The ammine, thiosulfato, and mixed ammine/thiosulfato complexes of silver(I) and gold(I). Inorganic Chemistry, 43 (10). pp. 3048-3056.

Senanayake, G. and Das, G.K. (2004) A comparative study of leaching kinetics of limonitic laterite and synthetic iron oxides in sulfuric acid containing sulfur dioxide. Hydrometallurgy, 72 (1-2). pp. 59-72.

Ellis, S. and Senanayake, G. (2004) The effects of dissolved oxygen and cyanide dosage on gold extraction from a pyrrhotite-rich ore. Hydrometallurgy, 72 (1-2). pp. 39-50.

Senanayake, G. (2004) A mixed surface reaction kinetic model for the reductive leaching of manganese dioxide with acidic sulfur dioxide. Hydrometallurgy, 73 (3-4). pp. 215-224.

Zhang, X.M., Senanayake, G. and Nicol, M.J. (2004) A study of the gold colloid dissolution kinetics in oxygenated ammoniacal thiosulfate solutions. Hydrometallurgy, 74 (3-4). pp. 243-257.

Senanayake, G. and Hefter, G. (2003) Gibbs energies of transfer of fluoride salts from water to aqueous alcohol mixtures. Monatshefte fur Chemie, 134 (5). pp. 669-677.

Senanayake, G. (2003) A surface reaction kinetic model to compare the reductive leaching of iron from goethite, magnetite, and limonitic nickel laterite ores by acidic sulfur dioxide. Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, 34 (5). pp. 735-738.

Chen, T., Hefter, G., Buchner, R. and Senanayake, G. (1998) Molar volumes and heat capacities of electrolytes and ions in nonaqueous solvents: 1. Formamide. Journal of Solution Chemistry, 27 (12). pp. 1069-1096.

Gill, D.S., Singh, P., Singh, J., Singh, P., Senanayake, G. and Hefter, G.T. (1995) Ultrasonic velocity, conductivity, viscosity and calorimetric studies of copper(I) and sodium perchlorates in cyanobenzene, pyridine and cyanomethane. Journal of the Chemical Society, Faraday Transactions, 91 . pp. 2789-2795.

Senanayake, G. and Muir, D.M. (1990) Competitive solvation and complexation of Cu(I), Cu(II), Pb(II), Zn(II), and Ag(I) in aqueous ethanol, acetonitrile, and dimethylsulfoxide solutions containing chloride ion with applications to hydrometallurgy. Metallurgical Transactions B, 21 (3). pp. 439-448.

Muir, D.M., Singh, P., Kenna, C.C. and Senanayake, G. (1989) Hydrometallurgical thermodynamics—IV. Effect of dimethylsulfoxide on the activity of Cu2+ in chloride media and free energies of transfer of CuCl−2 and AgCl−2 from water to aqueous dimethylsulfoxide. Electrochimica Acta, 34 (11). pp. 1573-1579.

Senanayake, G. and Muir, D.M. (1988) Free energies of transfer of Cu(II), Zn(II) and Pb(II) from water to mixtures of water with acetonitrile, ethanol and dimethylsulphoxide. Electrochimica Acta, 33 (2). pp. 251-255.

Senanayake, G. and Muir, D.M. (1988) Speciation and reduction potentials of metal ions in concentrated chloride and sulfate solutions relevant to processing base metal sulfides. Metallurgical Transactions B, 19 (1). pp. 37-45.

Senanayake, G. and Muir, D.M. (1988) Studies on liquid junction potentials in concentrated chloride solutions and determination of ionic activities and hydration numbers by the emf method. Electrochimica Acta, 33 (1). pp. 3-9.

Senanayake, G. and Muir, D.M. (1987) Studies on the liquid junction potential corrections of electrolytes at aqueous + mixed solvent boundaries. Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 237 (2). pp. 149-162.

Muir, D.M. and Senanayake, G. (1985) Refining copper by the acetonitrile process. Hydrometallurgy, 14 (3). pp. 279-293.

Conference Paper

Sitando, O., Dai, X., Senanayake, G. and Nikoloski, A.N. (2015) Gold dissolution in non-ammoniacal thiosulphate solutions: Comparison of fundamentals and leaching studies. In: World Gold Conference 2015, 29 September - 1 October 2015, Misty Hills Conference Centre, Johannesburg

Senanayake, G., Kyle, J., Hunt, S., Stone, K., Perera, N. and Jayasekera, S. (2014) Precipitation of calcium phosphate from hydrochloric acid leach liquor of a rare earth concentrate. In: 7th International Symposium - Hydrometallurgy (HYDRO) 2014, 22 - 25 June 2014, Victoria, BC, Canada

Senanayake, G., Jayasekera, S., Bandara, A.M.T.S., Königsberger, E., Königsberger, L.C. and Kyle, J. (2014) Rare earth metal ion solubility in acidic sulphate-phosphate solutions. In: Hydrometallurgy 2014: 7th International Symposium on Hydrometallurgy, 22 - 25 June, Victoria, BC, Canada pp. 313-324.

Pugaev, D., Nicol, M. and Senanayake, G. (2011) The mechanisms of the passivation of sulfide minerals in oxidative leaching processes. In: 6th Southern African Base Metals Conference 2011, 18 - 21 July 2011, Phalaborwa, South Africa

Zhang, X.M., Senanayake, G. and Nicol, M.J. (2008) Beneficial effect of silver in thiosulfate leaching of gold. In: Hydrometallurgy 2008: 6th International Symposium, 17 - 21 August, Phoenix, AZ pp. 801-810.

Senaputra, A., Senanayake, G., Nicol, M.J. and Nikoloski, A. (2008) Leaching nickel and nickel sulfides in ammonia/ammonium carbonate solutions. In: Hydrometallurgy 2008: 6th International Symposium, 17 - 21 August, Phoenix, AZ pp. 551-560.

Senanayake, G. (2004) Fundamentals and applications of metal-ligand complexes of gold(I/III) in non-cyanide gold processes. In: Green Processing 2004 - 2nd International Conference on the Sustainable Processing of Minerals, 10 - 12 May, Fremantle, Western Australia

Zhang, X.M., Senanayake, G. and Nicol, M.J. (2004) Study of the kinetics of dissolution of gold colloid in ammoniacal copper(II) thiosulfate solution. In: 2004 International Conference on Hydrometallurgy, 17 - 19 October 2004, Xi'an, Shaanxi Province, China

Senanayake, G. and Muir, D.M. (2003) Chloride processing of metal sulphides: Review of fundamentals and applications. In: Hydrometallurgy 2003: Proceedings of the 5th International Symposium, 24 - 27 August, Vancouver, Canada pp. 517-531.

Senanayake, G., Perera, W.N. and Nicol, M.J. (2003) Thermodynamic studies of the gold(III)/(I)/(0) redox system in ammonia-thiosulphate solutions at 25°C. In: Hydrometallurgy 2003: Proceedings of the 5th International Symposium, 24 - 27 August, Vancouver, Canada pp. 155-168.

Senanayake, G. (2003) The reductive leaching of manganese dioxide: Reaction kinetic models and mechanisms. In: Hydrometallurgy 2003: Proceedings of the 5th International Symposium, 24 - 27 August, Vancouver, Canada pp. 485-500.

Ellis, S., Andreazza, J. and Senanayake, G. (2002) The influence of a pipe reactor to improve pre-oxidation and gold recovery and lower cyanide consumption. In: Metallurgical Plant Design and Operating Strategies, 15 - 16 April, Sydney, Australia pp. 401-412.

Das, G.K., Muir, D.M., Senanayake, G., Singh, P. and Hefter, G. (1997) Acid leaching of nickel laterites in the presence of sulphur dioxide at atmospheric pressure. In: Hydrometallurgy and Refining of Nickel and Cobalt, August 17-20, 1997, Montreal, QC Canada pp. 471-488.

Das, G.K., Anand, S., Das, R.P., Muir, D.M., Senanayake, G., Singh, P. and Hefter, G.T. (1997) Atmospheric acid leaching of nickel laterites in the presence of sulphur dioxide. In: 27th Annual Hydrometallurgical Meeting of CIM, 17 - 20 August, Sudbury, Canado


Das, G.K., Senanayake, G., Muir, D., Singh, P. and Hefter, G. (1996) The leaching of limonitic nickel laterite using sulphur dioxide gas. Murdoch University, Perth, Western Australia.

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