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Effects of Conventional Flotation Frothers on the Population of Mesophilic Microorganisms in Different Cultures
School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran.
Software Engineering Lab, University of Mons, Mons, Belgium.
School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran.
School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran.
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2019 (English)In: Processes, ISSN 2227-9717, Vol. 7, no 10, article id 653Article in journal (Refereed) Published
Abstract [en]

Bioleaching is an environment-friendly and low-investment process for the extraction of metals from flotation concentrate. Surfactants such as collectors and frothers are widely used in the flotation process. These chemical reagents may have inhibitory effects on the activity of microorganisms through a bioleaching process; however, there is no report indicating influences of reagents on the activity of microorganisms in the mixed culture which is mostly used in the industry. In this investigation, influences of typical flotation frothers (methyl isobutyl carbinol and pine oil) in different concentrations (0.01, 0.10, and 1.00 g/L) were examined on activates of bacteria in the mesophilic mixed culture (Acidithiobacillus ferrooxidans, Leptospirillum ferrooxidans, and Acidithiobacillus thiooxidans). For comparison purposes, experiments were repeated by pure cultures of Acidithiobacillus ferrooxidans and Leptospirillum ferrooxidans in the same conditions. Results indicated that increasing the dosage of frothers has a negative correlation with bacteria activities while the mixed culture showed a lower sensitivity to the toxicity of these frothers in comparison with examined pure cultures. Outcomes showed the toxicity of Pine oil is lower than methyl isobutyl carbinol (MIBC). These results can be used for designing flotation separation procedures and to produce cleaner products for bio extraction of metals.

Place, publisher, year, edition, pages
MDPI, 2019. Vol. 7, no 10, article id 653
Keywords [en]
flotation, bioleaching, frother, mixed culture, machine learning
National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-76781DOI: 10.3390/pr7100653ISI: 000495436200015Scopus ID: 2-s2.0-85074239838OAI: oai:DiVA.org:ltu-76781DiVA, id: diva2:1371514
Note

Validerad;2019;Nivå 2;2019-11-20 (johcin)

Available from: 2019-11-20 Created: 2019-11-20 Last updated: 2019-11-20Bibliographically approved

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Chelgani, Saeed Chehreh

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