Publications
147 results found
Wu XQ, Monhemius AJ, Gochin RJ, 2003, Relationship between attachment probability and surface energy in adhesion process of gold particles to oil-carbon agglomerates, JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY, Vol: 10, Pages: 318-323, ISSN: 1005-9784
Ndlovu S, Monhemius AJ, 2003, Correlations between reaction rates and evolution of corrosion pits in bacterial leaching of pyrite, Transactions of the Institution of Mining and Metallurgy, Section C: Mineral Processing and Extractive Metallurgy, Vol: 112, Pages: 102-108, ISSN: 0371-9553
In order to understand the influence of crystallographic orientation on the mechanism of pyrite bioleaching, single crystals of pyrite cut to expose plane orientations of {100}, {111} and {110} were studied. Differences in the reaction rates of the pyrite surfaces in the presence of Thiobacillus ferrooxidans have been observed. The microbial corrosion patterns generated on the surfaces were further used to study the leaching process. Surfaces with high sulphur/iron atomic ratios were observed to develop surface films and to generate elongated pits similar in shape to bacteria, but much larger than the bacteria cell dimensions. The dissimilarity of corrosion patterns observed on the surfaces of samples indicates a variation in cell-surface interaction from one crystal plane to the other. Subsequent correlation between the surface corrosion patterns associated with the dissolution process and the changes occuring in the leaching solution indicated that the most signficant aspect in the early stages of leaching is the recognition and subsequent attachment of the bacteria to active sites on the immediate surfaces. This initial process consequently controls the leaching progression and defines the type and evolution of pits occurring on the surfaces. The overall analysis indicates that the surface properties of pyrite may control the initial oxidation kinetics and the evolution of corrosion patterns in acid bacterial leaching. © 2003 IoM Communications Ltd.
Ndlovu S, Monhemius AJ, 2003, Correlations between reaction rates and evolution of corrosion pits in bacterial leaching of pyrite, TRANSACTIONS OF THE INSTITUTIONS OF MINING AND METALLURGY SECTION C-MINERAL PROCESSING AND EXTRACTIVE METALLURGY, Vol: 112, Pages: C102-C108, ISSN: 0371-9553
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- Citations: 4
Dehghani A, Monhemius AJ, Gochin RJ, 2002, Evaluating the Nakajima et al. model for rectangular-aperture screens, Minerals Engineering, Vol: 15, Pages: 1089-1094, ISSN: 0892-6875
Nakajima et al. [Trans. Inst. Mining Metall. 87 (1978) C194] developed a method to measure the shape distribution of particles in terms of their size and thickness. This method was later extended to include models for square, rectangular, and circular aperture screens. In this project, the empirical equation for the probability of particles passing through the rectangular aperture screen in the Nakajima et al. model is replaced with a “basic probability” model and the results are compared. Next, regression equations relating the efficiency parameter of the model to selected screening operating variables are developed. Finally a “modified” Hatch and Mular model is introduced in the Nakajima et al. model and the results are compared with the experimental data. It is shown that both the new models fit the experimental results obtained from rectangular-aperture screens better than the original Nakajima et al. model.
Tarasova I, Georgaki I, Dudeney AWL, et al., 2002, Re-use of iron-rich sludges, SWEMP 2002, 7th international symposium on environmental issues and waste management in energy and mineral production, Pages: 1087-1093
Georgaki I, Dudeney AWL, Monhemius AJ, 2002, Characterisation of iron-rich sludges for densification and iron recovery, Environmental Science and Pollution Research International, Vol: 3, Pages: 229-230, ISSN: 0944-1344
Palacios EG, Monhemius AJ, 2001, Infrared spectroscopy of metal carboxylates I. Determination of free acid in solution, HYDROMETALLURGY, Vol: 62, Pages: 135-143, ISSN: 0304-386X
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- Citations: 19
Correia MJ, Carvalho J, Monhemius J, 2001, The effect of tetrahedrite composition on its leaching behaviour in FeCl<sub>3</sub>-NaCl-HCl solutions, MINERALS ENGINEERING, Vol: 14, Pages: 185-195, ISSN: 0892-6875
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- Citations: 11
Monhemius AJ, 2001, The Royal School of Mines-150 years of excellence, International Mining and Minerals, Pages: 13-15, ISSN: 1461-4715
Meggiolaro V, Niccolini G, Miniussi G, et al., 2000, Multidisciplinary approach to metallogenic models and types of primary gold concentration in the Cretaceous arc terranes of the Dominican Republic, TRANSACTIONS OF THE INSTITUTION OF MINING AND METALLURGY SECTION B-APPLIED EARTH SCIENCE, Vol: 109, Pages: B95-B104, ISSN: 0371-7453
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- Citations: 3
Correia MJN, Carvalho JR, Monhemius AJ, 2000, The leaching of tetrahedrite in ferric chloride solutions, HYDROMETALLURGY, Vol: 57, Pages: 167-179, ISSN: 0304-386X
Swash PM, Monhemius AJ, Schaekers JM, 2000, Solubilities of process residues from biological oxidation pretreatments of refractory gold ores, Littleton, annual meeting of the society-for-mining-metallurgy-and-exploration, 2000, SALT LAKE CITY, UTAH, Publisher: Soc Min Engineers Aime, Pages: 115-123
Monhemius AJ, 2000, Man, Minerals and Environment, Highlights in Environmental Research, Editors: Mason, London, Publisher: Imperial College Press, Pages: 67-90
SWASH PM, MONHEMIUS AJ, SCHAEKERS JM, 2000, SOLUBILITIES OF PROCESS RESIDUES FROM BIOLOGICAL OXIDATION PRETREATMENTS OF REFRACTORY GOLD ORES., MINOR ELEMENTS 2000: PROCESSING AND ENVIRONMENTAL ASPECTS OF As, Sb, Se, Te AND Bi, Editors: YOUNG, LITTLETON, USA, Publisher: SME, Pages: 115-123
Monhemius AJ, Swash PM, 1999, Removing and stabilizing as from copper refining circuits by hydrothermal processing, JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY, Vol: 51, Pages: 30-33, ISSN: 1047-4838
Dehghani A, Gochin R, Monhemius AJ, 1999, Separation of flaky particles using rectangular aperture screens, Soc. Mining Engineers Annual Meeting, March 1999, Pages: 99-178
DEHGHANI A, GOCHIN RJ, MONHEMIUS AJ, 1999, SHAPE SEPARATION OF PARTICLES WITH RECTANGULAR APERTURE SCREENS, Montreal, 38TH CONFERENCE OF METALLURGISTS, Publisher: Canadian Inst Mining, Metallurgy and Petroleum, Pages: 489-499
A., GOCHIN R.J. AND MONHEMIUS A.J."."IN PROCESSING, 38TH CONF. METALLURGISTS, . AUGUST 1999, 489-499.
Nyashanu RM, Monhemius AJ, Buchanan DL, 1999, The effect of ore mineralogy on the speciation of arsenic in bacterial oxidation of refractory arsenical gold ores, Biohydrometallurgy and the Environment Toward the Mining of the 21St Century, Pt A 1999, Vol: 9, Pages: 431-441
SWASH PM, MONHEMIUS AJ, 1999, Comparison of the solubilities of arsenic-bearing wastes from hydrometallurgical and pyrometallurgical processes, Seminar of GDMB on Slags in Metallurgy, Pages: 141-150
NYASHANU RM, MONHEMIUS AJ, BUCHANAN DL, 1999, THE EFFECT OF ORE MINERALOGY ON THE SPECIATION OF ARSENIC IN BACTERIAL OXIDATION OF REFRACTORY ARSENICAL GOLD ORES., INTERNATIONAL BIOHYDROMETALLURGY SYMPOSIUM, IBS'99, Pages: 431-441
Neira Arenas G, Monhemius AJ, 1998, The kinetics of pressure oxidation of arsenopyrite and arsenopyrite/pyrite mixtures by dissolved oxygen, Environment and Innovation in Mining and Mineral Technology, University of Concepcin, Concepcin, Chile, Pages: 835-849
Nyashanu RM, Monhemius AJ, Buchanan DL, 1998, The effect of ore composition on the speciation of arsenic in bacterial oxidation of refractory gold-bearing arsenical ores, Environment and Innovation in Mining and Mineral Technology, University of Concepcin, Concepcin, Chile, Pages: 155-168
NEIRA ARENAS G, MONHEMIUS AJ, 1998, THE KINETICS OF PRESSURE OXIDATION OF ARSENOPYRITE AND ARSENOPYRITE/PYRITE MIXTURES BY DISSOLVED OXYGEN., ENVIRONMENT AND INNOVATION IN MINING AND MINERAL TECHNOLOGY, Editors: SANCHEZ, VERGARA, CASTRO, CONCEPCIÓN, CHILE, Publisher: UNIVERSITY OF CONCEPCIÓN, Pages: 835-849
SWASH PM, MONHEMIUS AJ, 1998, THE SCORODITE PROCESS: A TECHNOLOGY FOR THE DISPOSAL OF ARSENIC IN THE 21ST CENTURY., EFFLUENT TREATMENT IN THE MINING INDUSTRY, Editors: CASTRO, VERGARA, SANCHEZ, CONCEPCIÓN, CHILE, Publisher: UNIVERSITY OF CONCEPCIÓN, Pages: 119-161, ISBN: 9789562271561
IN . (CASTRO S.H., F. AND SANCHEZ M.A., EDS.),, 1998, 119-161.
NYASHANU RM, MONHEMIUS AJ, BUCHANAN DL, 1998, THE EFFECT OF ORE COMPOSITION ON THE SPECIATION OF ARSENIC IN BACTERIAL OXIDATION OF REFRACTORY GOLD-BEARING ARSENICAL ORES., ENVIRONMENT AND INNOVATION IN MINING AND MINERAL TECHNOLOGY, Editors: SANCHEZ, VERGARA, CASTRO, CONCEPCIÓN, CHILE, Publisher: UNIVERSITY OF CONCEPCIÓN, Pages: 155-168
Swash PM, Monhemius AJ, 1998, The Scorodite Process: a technology for the disposal of arsenic in the 21st century, Effluent Treatment in the Mining Industry, University of Concepcin, Concepcin, Chile, 1998, Pages: 119-161
MONHEMIUS AJ, SWASH PM, 1997, TECHNOLOGIES AND ENVIRONMENTAL CONSIDERATIONS FOR THE DISPOSAL OF ARSENIC FROM METALLURGICAL PROCESSES, VII INTERNATIONAL CONGRESS EXTRACTIVE METALLURGY
MONHEMIUS A.J. AND SWASH P.M. "." PRESENTED AT Y, , MAY 1997. PROCEEDINGS, P 345 (ABSTRACT ONLY)
DIAZ MA, MONHEMIUS AJ, NARAYANAN A, 1997, CONSECUTIVE HYDROXIDE-SULPHIDE PRECIPITATION TREATMENT OF ACID ROCK DRAINAGE, 4TH INTERNATIONAL CONFERENCE ON ACID ROCK DRAINAGE (4 ICARD), Pages: 1179-1193
TEIXEIRA DA SILVA F, OGASAWARA T, BARBOSA JP, et al., 1997, EXTRACTION OF YTTRIUM FROM A BRAZILIAN XENOTIME CONCENTRATE BY SULPHATION AND WATER LEACHING, TRANS INSTN. MIN. METALL. (SECT. C: MINERAL PROCESS. EXTR. METALL.), Vol: 106, Pages: C43-C46
SWASH PM, MONHEMIUS AJ, 1996, CHARACTERISTICS OF CALCIUM ARSENATE COMPOUNDS RELEVANT TO DISPOSAL OF ARSENIC FROM INDUSTRIAL PROCESSES, LONDON, MINERALS, METALS AND THE ENVIRONMENT II, Publisher: INSTITUTION OF MINING AND METALLURGY, Pages: 353-361
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