The major theme of the International Biohydrometallurgy Symposium IBS-99 'Biohydrometallurgy and the Environment toward the mining of the 21st Century', held in El Escorial (Spain) from 20-23 June 1999, is biohydrometallurgy and the environment since it is predicted that in the coming century biotechnology will make its greatest contribution in this area. From the papers in these volumes it is clear that environmental issues are already of great interest to the biohydrometallurgical community.
Although all the classical biohydrometallurgical topics - e.g. bioleaching, microbiology, molecular biology, biosorption, bioremediation - are addressed, the continued emphasis is on the environmentally friendly aspects of the biotechnologies used.
Given the interdisciplinary nature of the field, biologists, hydrometallurgists, geologists, chemists, physicists and engineers should be interested in this collection of papers which discuss the future trends in biohydrometallurgy.

Table of Contents

VOLUME A: Bioleaching, Microbiology. Chapter 1 Bioleaching. Past, present and future of biohydrometallurgy (Ehrlich, H. L.). Chemical and electrochemical basis of bioleaching processes (Hansford, G. S., Vargas, T.). Direct versus indirect bioleaching (Sand,W., Gehrke, T., Jozsa, P.-G., Schippers, A.). Direct versus indirect bioleaching (Tributsch, H.).The design of bioreactors (Rossi, G.). Present and future commercial applications of biohydrometallutgy (Brierley, J. A., Brierley, C. L.). Bacterial succession in bioheap leaching (Brierley, C. L.). Semi-continuous bioleaching of heavy metals and trace elements from coal (Aller, A., Cara, J., Martínez, O., Morán, A.). Mineralogical factors affecting arsenopyrite oxidation rate during acid ferric sulphate and bacterial leaching of refractory gold ores (Andrews, L., Merkle, R. K. W.). Acid-bacterial leaching of pyrite single crystal (Aoki, A.). Adsorption of Bacillus subtilis to minerals: Effects on the flotation of dolomite and apatite (Zheng, X., Arps, P. J., Smith, R. W.). Bioleaching behaviour of chalcopyrite in the presence of silver at 35° and 68°C (Blazquez, M. L., Alvarez, A., Ballester, A., González, F., Muñoz, J. A.). Bioleaching of a copper sulphide flotation concentrate using mesophilic and thermophilic microorganisms (Rivera, R. E., Ballester, A., Blázquez, M. L., González, F.). Influence of thermophilic microorganisms on the electrochemical behaviour of pyrite (González, J. L., Ballester, A., Blázquez, M. L., González, F.). Bioleaching of a cobaltiferous pyrite at 20% solids: A continuous laboratory-scale study (d'Hugues, P., Cezac, P., Battaglia, F., Morin, D.). Superficial compounds produced by Fe(III) mineral oxidation as essential reactants for bio-oxidation of pyrite by Thiobacillus ferrooxidans (Toniazzo, V., Mustin, C., Benoit, R., Humbert, B., Berthelin, J.). Comparis


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