Adhesion of two bacteria onto dolomite and apatite: their effect on dolomite depression in anionic flotation

Zheng, X. P.; Arps, Peggy J.; Smith, Ross

doi:10.1016/s0301-7516(00)00050-8

Cited by 72 publications

(33 citation statements)

References 7 publications

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“…phlei cells have been used as flotation collectors for hematite [52,53] and as flotation depressants in the anionic flotation of apatite and dolomite [54]. Zheng et al [55] used Mycobacterium phlei and Bacillus subtilis in order to dolomite depression in anionic flotation. Miettinen et al [56,57] showed that in anionic flotation of apatite and calcite Staphylococcus carnosus functions as a depressant for apatite, but as an activator for calcite while freeze dried Staphylococcus carnosus can work as a collector for both apatite and calcite.…”

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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“…Dolomite (CaMg(CO 3 ) 2 ) and magnesite (MgCO 3 ) are the main Mg carbonates [3][4][5][6][7][8] that can be associated with other salt-type minerals, including phosphates (e.g., Apatite), sulfates (e.g., Barite), halides (e.g., Fluorite) and tungstates (e.g., Scheelite) [5,9], as well as sulfides [10], and other oxides [2].…”

Section: Introductionmentioning

confidence: 99%

A Review of Flotation Separation of Mg Carbonates (Dolomite and Magnesite)

et al. 2018

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Abstract:It is well documented that flotation has high economic viability for the beneficiation of valuable minerals when their main ore bodies contain magnesium (Mg) carbonates such as dolomite and magnesite. Flotation separation of Mg carbonates from their associated valuable minerals (AVMs) presents several challenges, and Mg carbonates have high levels of adverse effects on separation efficiency. These complexities can be attributed to various reasons: Mg carbonates are naturally hydrophilic, soluble, and exhibit similar surface characteristics as their AVMs. This study presents a compilation of various parameters, including zeta potential, pH, particle size, reagents (collectors, depressant, and modifiers), and bio-flotation, which were examined in several investigations into separating Mg carbonates from their AVMs by froth flotation.

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“…For example, the attachment of Thiobacillus ferrooxidans to quartz, pyrites and other sulphides has been studied (Solari et al 1992). In addition, Mycobacterium phlei has been employed to achieve selectivity in either the flotation or flocculation of several minerals such as hematite, apatite, dolomite and coal (Zheng et al 1998(Zheng et al , 2001Smith et al 1991Smith et al , 1994Misra et al 1993;Raichur et al 1996;Raichur and Vijayalakshmi 2003). The reported selectivity was assigned to the preferential adsorption of bacteria due to their affinity to certain species on the mineral surface.…”

Section: Introductionmentioning

confidence: 99%

Impact of the Adsorption of Corynebacterium Diphtheriae Intermedius Bacteria on Enhancing the Separation Selectivity of Dolomite and Apatite

Elmahdy

El-Mofty

Abdel-Khalek

et al. 2011

Adsorption Science & Technology

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ABSTRACT:The surface modification of minerals by bacteria has recently been examined in an attempt to improve their separation selectivities. In this paper, a study of the effect of Corynebacterium diphtheriae intermedius (CDI) bacteria on the dolomite/apatite separation process is reported. Bacterial interaction with both minerals was investigated employing Fourier-transform infrared (FT-IR) spectroscopy together with measurements of the adsorption isotherm and the zeta potential. FT-IR methods were used to identify the functional groups on the surface of each mineral before and after the adsorption of bacteria, while the adsorption isotherm and the zeta potential were used to illustrate the type of adsorption process involved, i.e. physical versus chemical adsorption. The application of bioflotation processes to natural ores using CDI bacteria can lower the MgO content of the ores to less than 1%.

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Adhesion of two bacteria onto dolomite and apatite: their effect on dolomite depression in anionic flotation

Cited by 72 publications

References 7 publications

Flotation Frothers: Review of Their Classifications, Properties and Preparation

Flotation Frothers: Review of Their Classifications, Properties and Preparation

A Review of Flotation Separation of Mg Carbonates (Dolomite and Magnesite)

Impact of the Adsorption of Corynebacterium Diphtheriae Intermedius Bacteria on Enhancing the Separation Selectivity of Dolomite and Apatite

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