Possible Role of the Biosurfactant-Producing and Fe-S-Oxidizing Bacterium in Silicate and Sulfide Bioflotation Processes

Edy Sanwani; Riria Zendy Mirahati; Siti Khodijah Chaerun

doi:10.4028/www.scientific.net/AMR.1130.493

Paper Titles

Microbial Leaching of Copper from Tailings of Low Grade Sulphide Ores in Zambia
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New Technology of Base Metals Precipitation by Hydrogen Sulfide Obtained Using Desulfurella acetivorans and Desulfurella kamchatkenis
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Influence of Bacterial Detachment on the Bioflotation of Malachite
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Isolation and Selection of Halophilic Ureolytic Bacteria for Biocementation of Calcium and Magnesium from Seawater
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Possible Role of the Biosurfactant-Producing and Fe-S-Oxidizing Bacterium in Silicate and Sulfide Bioflotation Processes
p.493

Uranium (VI) Sorption Using Functionalized-Chitosan Magnetic Nanobased Particles
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FTIR Analysis on Organic Sulfur Distribution: Aliphatic Mercaptans in Lignite, Prior and after Multistage Artificial Biotreatment Process
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Biopolymers as Encapsulating Agents for the Immobilization of Prussian Blue and Analogues for the Sorption of Cesium
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Selective Recovery of Au(III) from Binary Metal Solution Using Aliquat-336-Impregnated Alginate Capsule
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1130Possible Role of the Biosurfactant-Producing and...

Possible Role of the Biosurfactant-Producing and Fe-S-Oxidizing Bacterium in Silicate and Sulfide Bioflotation Processes

Abstract:

A biosurfactant-producing-and Fe-S-oxidizing bacterium, namely Pseudoclavibacter sp. strain SKC/XLW-1, was studied in an attempt to seek more benign alternatives for the replacement of relatively toxic chemical reagents in the flotation of silicate and sulfide minerals. Our study showed that Pseudoclavibacter sp. SKC/XLW-1 was capable of yielding biosurfactants as evidenced by a decrease in the surface tension of the solutions and an increase of the contact angle of the pyrite or silica surfaces as a function of time. This bacterial strain was also observed to promote the oxidation of pyrite, thus generating Fe-oxides as well as sulfuric acid as indicated by a decline of the solution pH and FTIR analysis. Scanning electron microscopy equipped with energy dispersive X-ray spectroscopy (SEM-EDS) observations of the silica-or pyrite-bacterial cell complexes revealed the presence of bacterial cell aggregation along with silica or pyrite, where silica or pyrite particles become embedded in the biofilm matrix. It is suggested from this study that the bacterium Pseudoclavibacter sp. SKC/XLW-1 could potentially be applicable as the flotation bioreagents (collector, frother or depressant) for both silicate and sulfide flotation processes.

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Advanced Materials Research (Volume 1130)

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493-498

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https://doi.org/10.4028/www.scientific.net/AMR.1130.493

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November 2015

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Edy Sanwani*, Riria Zendy Mirahati, Siti Khodijah Chaerun

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