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Analysis of shake flask experiments results conducted on residues from hydrometallurgical processes

Citation

Steel, A and Hawbol, K and Khan, F, Analysis of shake flask experiments results conducted on residues from hydrometallurgical processes, International Journal of Environmental Science and Technology, 6, (1) pp. 57-68. ISSN 1735-1472 (2009) [Refereed Article]

DOI: doi:10.1007/BF03326060

Abstract

Hydrometallurgical facilities processing sulfide based ores produce waste residues in the form of sludges that contain concentrations of metals, as well as metal sulfides. As a part of the waste characterization and risk assessment process, a statistical design of experiment was used to assess the significant factors and interactions in the residue leaching process. Two shake flask experiments, a 24 factorial design and 23 central composite design were employed to evaluate the effect of mixing time, test pH, solid/liquid ratio and residue type on acidity, alkalinity, sulfate and metal concentration and pH of the resulting filtered leachate. The results indicate that the variable tested mixing time and solid/liquid ratio most strongly affect metal concentration in the filtrate from waste residue samples tested over a moderate test pH range. When tests were conducted over a longer test period and at lower test pH values, test pH and residue type were dominant factors contributing to residue filtrate metal concentration. © IRSEN, CEERS, IAU.

Item Details

Item Type:Refereed Article
Keywords:Acid generation; Batch tests; Characterization; Factorial design; Leaching; Process waste; Acid generation; Assessment process; Batch tests; Central composite designs; Dominant factors; Factorial design; Hydrometallurgical process; Leachate; Acids
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Ocean Engineering
Objective Division:Mineral Resources (excl. Energy Resources)
Objective Group:Environmentally Sustainable Mineral Resource Activities
Objective Field:Environmentally Sustainable Mineral Resource Activities not elsewhere classified
Author:Khan, F (Professor Faisal Khan)
ID Code:94552
Year Published:2009
Web of Science® Times Cited:2
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2014-09-11
Last Modified:2014-09-11
Downloads:0

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