Organizing committee and list of sponsors. Foreword. List of contributors. Hydrometallurgy and Sustainable Development: EU R&D activity and strategy for sustainable development in the mineral industries; A. Adjemian. Hydrometallurgy - an environmentally sustainable technology? M.T. Anthony, D. S. Flett. Environmental impact of increasing production of gold from hydrothermal resources; A.K. Haines. In-situ leaching recovery of copper: what's next? J.B. Hiskey. Hydrometallurgical processing of refinery slimes at Phelps Dodge: theory to practice; J.E. Hoffmann, B. Wesstrom. Materials production and the environment; R.C. Villas Boas. Fundamentals: Reaction of galena in ferric sulphate-sulphuric acid media; J.E. Dutrizac, T.T. Chen. Multicomponent equilibrium calculations in process design: study of some acid digester reactors; P. Koukkari, H. Sippola, A. Sundquist. Hematite solubility in sulphate process solutions; V.G. Papangelakis, B.C. Blakey, H. Liao. Hydrothermal precipitation from aqueous solutions containing iron(III), arsenate and sulphate; P.M. Swash, A.J. Monhemius. Leaching: Heap leaching of poor nickel laterites by sulphuric acid at ambient temperature; S. Agatzini-Leonardou, D. Dimaki. Mechano-chemical treatment of tetrahedrite as a new non-polluting method of metals recovery; P. Balaz, et al. Non-traditional methods of treating high-silicon ores containing rare elements; S.V. Chizhevskaya, et al. Scope and limitations for application of selectivity in oxidation potential-controlled leaching of metal sulphides; N.L. Piret, J.F. Castle. Control of arsenic and selenium during nickel matte leaching; J.J. Robinson, K. Barbetti, R.P. Das. Electrochemical study of oxidative dissolution of synthetic violarite in aqueous media; T.E. Wamer, N.M. Rice, N. Taylor. Bioprocessing: Stability of arsenical bacterial oxidation products; K. Adam, et al. Removal of iron from kaolin and quartz: dissolution with organic adds; C.F. Bonney. Bioreduction of gold on algae and with amtino acids; A.R. Gee, A.W.L. Dudeney. Metal speciation in bioleach solutions during bacterial dissolution of a complex mineral sulphide concentrate; M.A. Jordan, C.V. Phillips, D.W. Barr. Bacterial oxidation of an auriferous arsenical concentrate; C. Komnitsas, F.D. Pooley. Oxidation of arsenopyrite in bacterial ferric solutions; C. Komnitsas, F.D. Pooley. Effect of silver and bismuth on bioleaching of copper sulphide concentrates with thermophilic microorganisms; J.L. Mier, et al. Dissolved iron equilibrium in bacterial leaching systems; J.V. Wiertz, I. Godoy Rios, B. Escobar Miguel. Influence of substrate polarization on activity of Thiobacillus ferrooxidans in bioleaching; J.V. Wiertz, et al. Gold: Pretreatment by electrolytic or oxidative leaching for recovery of gold and silver from refractory sulphide concentrates; L.M. Abrantes, M.C. Costa, A.P. Paiva. Iodide-thiocynate leaching system for gold; O. Barbosa-Filho, A.J. Monhemius. Leaching and recovery of gold by use of acidothioureation on copper-mine wastes: laboratory and pilot-plant tests and process modelling; P.F. Kavanagh, et al. PRISMA - a hydrometallurgical process simulator: application in gold extraction from refractory pyrites; A. Kontopoulos, et al. Interrelationship between lixiviants and galvanic interaction during dissolution of gold; L. Lorenzen, J.S.J. van Deventer, M.T. van Meersbergen. Comparative performance of porous adsorbents in presence of gold cyanide, organic foulants and solid fines; F.W. Petersen, J. S.J. van Deventer. Reductive sorption methods for extraction of noble metals from solution; Yu.A. Tarasenko, et al. Dissolution of gold in oxidized bromide solutions; R.B.E. Trindade, P.C.P. Rocha, J.P. Barbosa. Leaching of gold from sulphide concentrates with thiosulphate/polysulphide produced by disproportionation of elemental sulphur in ammoniacal media; Zhu Guocai, Fang Zhaoheng, Chen Jiayong. Adsorption of gold-thiourea complex on Greek lignite; A.I. Zouboulis, K.A. Kydros, K.A. Matis. Solution Purification: Norzink removal of cobalt from zinc sulphate electrolytes; K. Borve, T. Ostvold. Cementation of mercury(II) from chloroalkali effluents by use of Zn and Fe; J.M.R. de Carvalho, A. Anacleto. Removal of antimony and bismuth from copper tankhouse electrolytes; D.C. Cupertino, et al. Novel solvent extraction reagents for recovery of zinc from sulphate leach solutions; R.F. Dalton, P.M. Quan. Recovery of acids and bases used in metal treatment processes by diffusion dialysis; G.P. Herz, C. Byszewski, M. Jaffari. Recommended separation processes for ion-absorbed rare earth minerals; Li Deqian, et al. Purification of waste waters containing heavy metals by surfactant liquid membrane extraction; M. Samar, et al. Electroassisted separation of metals by solvent extraction and supported-liquid membranes; D.J. Schiffrin, et al. Equilibrium and kinetic studies of copper extraction from chloride solutions with pyridine carboxylates; J. Szymanowski, et al. Cadmium removal from phosphoric acid - Israeli experience; S.D. Ukeles, E. Ben-Yoseph, N.P. Finkelstein. Solvent extraction of rhodium with Kelex 100 ; C.L. Yan, J. Alstad. Effluent Treatment: Removal of free cyanide from solution with silver-impregnated activated carbon; Y. Choi, H.T. Lieuw, G. Van Weert. Removal of heavy metal ions from liquid effluents by solvent-impregnated resins; J.L. Cortina, et al. Use of a fluidized-bed ion-exchange system for heavy metals removal from waste streams; P. Cosmen, M.L. Ruiz. Application of ultrafiltration assisted by complexation to treatment of industrial waste waters; G. Durand, M. Rakib, I. Michelet. Application of strong magnetic fields for heavy metal removal; M. Franzreb, et al. Design and construction aspects of pilot-scale passive treatment systems for acid rock drainage at metal mines J.J. Gusek, J.T. Gormley, J.W. Scheetz. Wheal Jane - can wetlands technology cope? R.M. Hamilton, N.A. Postlethwaite, S.A. Foster. Retention of cadmium in clay minerals by a hydrothermal method; Ke Jia-Jun. Use of zeolitic tuff for control and recycling of effluent; P.J. Leggo. NOx suppression with hydrogen peroxide in the metals industry; C.F. McDonogh. Application of fibrous ion exchangers in air purification from acidic impurities; V.S. Soldatov, I.S. Elinson, A.A. Shunkevich. Processes: Hydrometallurgical processing of complex copper-zinc concentrates; B.S. Boyanov, R.I. Dimitrov. Integration of Sherritt Zinc Pressure Leach Process at Ruhr-Zink refinery, Germany; M.J Collins, et al. Recovery of platinum group metals from oxide ores - TML Process; S. Duyvesteyn, Houyuan Liu, W P.C. Duyvesteyn. Development of Intec Copper Process by an international consortium; P.K. Everett. Introduction to spray roasting process for hydrochloric acid regeneration and its application to mineral processing; L.J.F. Harris. Production of high-grade tin in a new electrolytic plant; JI.F. Rodriguez, et al. Waste Disposal: Towards zero-discharge mining: minimization of water outflow; S.A. Cale. Design of a tailing facility to mitigate potential acid rock drainage; D.R. East, et al. Exploitation of shear and compression rheology in disposal of bauxite residue; M.D. Green, N.J. de Guingand, D.V. Boger. Leaching of heavy metals from contaminated concrete rubbish material; W.H. Holl. Processing of electric arc furnace dust via chloride hydrometallurgy; R.O. McElroy, M. McCIaren. Prediction of water contamination arising from disposal of solid wastes; P.B. Mitchell, C. P. Waller, K. Atkinson. Improved process for concentration of ulexite and boric acid production; R.E. Pocovi, A.A. Latre, O.A. Skaf. Decontamination of site of a secondary zinc smelter in Torrance, California; E.C. Roche, J. Doyle, C.J. Haigh. Disposal of inorganic wastes from sulphate titanium dioxide process at Langoya, Norway; K.L. Sandvik, T. Sverreson. Effluent treatment in IMI Phosphoric Acid Process; S.D. Ukeles, et al. Recycling: Metals recovery from hydrodesulphurization catalysts; F. Delmas, et al. Environmentally sound hydrometallurgical recovery of chemicals from aluminium industry spent potlining; R.J Grolman, F.M. Kimmerle, C.C. Holywell. Recovery of vanadium from spent catalysts and alumina residues; E.M. Ho, et al. Ecological treatment of waste products from zinc hydrometallurgy; D. Juan, A. Perales. Production of indium from Imperial Smelting Process residues; B. Nikov, P. Stojanov, T. Stojadinovic. Subject index.