Coal flotation using a biosurfactant from Pseudomonas aeruginosa as a frother

Fazaelipoor, Mohammad Hassan; Khoshdast, Hamid; Ranjbar, Mohammad

doi:10.1007/s11814-010-0223-6

Cited by 39 publications

(20 citation statements)

References 14 publications

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“…The first investigation on using these biosurfactants in flotation of coal and minerals was done by Fazaelipoor et al [79]. They studied frothing characteristics and flotation applicability of rhamnolipid type biosurfactants as frother.…”

Section: Biofrothersmentioning

confidence: 99%

Flotation Frothers: Review of Their Classifications, Properties and Preparation

Khoshdast¹

2011

TOMPJ

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Abstract:The importance of frothers in flotation is widely acknowledged, particularly in terms of their role with respect to bubble size, and the stability and mobility of the froth phase. These factors play a significant role in the kinetic viability of the process, and the overall recovery and the grade that can be achieved from a flotation cell or circuit. About 60 years ago, Wrobel [1] presented a comprehensive review of flotation frothers, their action, properties and structures. However, during recent six decades flotation reagent technology has undergone considerable evolutions and innovations. The aim of the present review is to provide an updated, comprehensive database comprising recent developments in flotation frother technology as well as some historical aspects. Different types of flotation frothers are discussed regarding to their classifications, properties, and preparation methods. New classification schemes have been suggested in parallel with introducing new characterization criteria. New classes of frothers are actually conventional frothers modified by incorporating certain functional "group" or "atoms" into their molecular structure. Like particle surface modifiers, frothers are also influenced by biotechnology, leading to introducing a new class of frothers named as "biofrothers".

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Section: Biofrothersmentioning

confidence: 99%

Flotation Frothers: Review of Their Classifications, Properties and Preparation

Khoshdast¹

2011

TOMPJ

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“…frother height and half-life, in comparison with methyl isobutyl carbinol (MIBC). However, some points challenging the results reported by Fazaelipoor et al [13] are: 1) diesel oil being used as a biosurfactant solvent. After solvent evaporation, heavy hydrocarbon residuals of diesel oil would remain which increase the impurity of crude biosurfactant.…”

Section: Introductionmentioning

confidence: 91%

“…Although there are a number of studies related to the direct application of microorganisms in flotation and flocculation of minerals which are well reviewed by Hanumantha Rao et al [11] and Khoshdast and Sam [12], few scientific researches which apply biosurfactants have been found. The only available work on using rhamnolipid biosurfactants in flotation of coal and minerals was done by Fazaelipoor et al [13]. They studied frothing characteristics and flotation applicability of rhamnolipid type biosurfactants as a frother.…”

Section: Introductionmentioning

confidence: 99%

An Efficiency Evaluation of Iron Concentrates Flotation Using Rhamnolipid Biosurfactant as a Frothing Reagent

Khoshdast¹,

Sam²

2012

Environmental Engineering Research

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The effect of a rhamnolipid biosurfactant produced by a Pseudomonas aeruginosa MA01 strain on desulfurization of iron concentrates was studied. Surface tension measurement and frothing characterization indicated better surface activity and frothability of rhamnolipid compared to methyl isobutyl carbinol (MIBC) as an operating frother. Reverse flotation tests using rhamnolipid either as a sole frother or mixed with MIBC, showed that the desulfurization process is more efficient at pH 4.5 and high concentration of rhamnolipid in the presence of MIBC. However, under these conditions water recovery decreased due to the change in rhamnolipid aggregates morphology. Results from the present study seemed promising to introduce the biosurfactant from Pseudomonas aeruginosa as a new frother.

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“…Fazaelipoor et al178 , a P. aeruginosa derived biosurfactant was examined in coal flotation as a frother; permitting a combustible matter recovery of 72-79 % with 10-15.5 % ash content supporting 55-57.5% separation efficiency. Recent studies showed that P. aeruginosa derived rhamnolipid exhibited better surface activity and frothability were studied when compared Page 22 of 46with conventional flotation frothers, methyl isobutyl carbinol, pine oil, Dowfroth-250 and Aerofroth-65 179.…”

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confidence: 99%