Biobeneficiation of bauxite using bacillus polymyxa calcium and iron

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Abstract. Calcium and iron removal from a bauxite ore by Bacillus polymyxa has been demonstrated. Within a period of 7 days, the above organism could remove all the calcium and about 45% of iron from the ore in the presence of 2% sucrose in a Bromfield medium

calcium and iron from bauxite. ... bauxite using Bacillus polymyxa: calcium and iron removal. ... R & D needs in mineral biobeneficiation. Hydrometallurgy 104: 465–470

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A soil bacterium Paenibacillus polymyxa was recently shown to selectively remove calcium and iron impurities from low grade bauxite ( 50% Al), for

Jan 02, 2012 With the depleting reserves of high-grade iron ore in the world, froth flotation has become increasingly important to process intermediate- and low-grade iron ore in an attempt to meet the rapidly growing demand on the international market. In over half a century’s practice in the iron ore industry, froth flotation has been established as an efficient method to remove

Sep 27, 2014 Red mud, in most cases, contains elevated concentrations of iron in addition to aluminium, titanium, sodium and valuable rare earth elements. Given the scarcity of iron supply globally, the iron content of red mud has attracted increasing research interest. ... Biobeneficiation of bauxite using Bacillus polymyxa: calcium and iron removal. Anand

Abstract: Reduction sintering - magnetic separation process was adopted to deal with high iron-bearing bauxite. The effects of calcium oxide on sintering and Al-Fe separation effect of sintering product were analyzed. Components and microstructure of the reduced sintering product added different dosage of calcium oxide were studied by X-ray diffraction and scanning electron

Biobeneficiation processes involving the separation of valuable minerals from ores and materials using conventional flotation and flocculation methods have been shown to be promising in recent years. There is an enormous potential to utilize microorganisms as flocculating agents, flotation collectors and/or depressants. The study involves Biobeneficiation of oxide minerals using

Sep 10, 2021 Calcium removal from bauxite using Paenibacillus polymyxa. Mineral biotechnology. Microbial aspects of mineral beneficiation, metal extraction, and environmental control , Edited by: K. Kawatra S and K. A. Natarajan, 183--190, Society for Mining, Metallurgy, and Exploration (SME), USA

It is evident that both direct bacterial attachment as well as indirect mechanisms have a role to play in the biobeneficiation process by Bacillus polymyxa. Calcium is present as calcite (CaCO 3) and iron as hematite (Fe203) and goethite [FeO(OH)] in the ore

Buy Biobeneficiation of Bauxite ore using Bacillus polymyxa: Surface Modification of Quartz, Calcite and Magnetite using Bacillus polymyxa on

Nov 01, 1999 The biological removal of calcium from a bauxite ore in the presence of the soil bacterium Paenibacillus polymyxa is demonstrated. A column bioreactor that can be either operated in a fluidized-bed (FB) mode for coarser particles or in a total-recycle-slurry (TRS) mode for finer particles was designed, fabricated and tested for this purpose

May 01, 1997 Biogenesis thus plays a significant role in bauxite mineralization. Various types of bacteria and fungi, such as Bacillus polymyxa, Bacillus coagulans and Aspergillus niger, were found to be efficient in significant calcium solubilization and partial iron removal from bauxite ore. Probable mechanisms in the biobeneficiation process are analyzed

Biobeneficiation of bauxite ore using B.polymyxa was carried out in Bromfield medium. 10% of active inoculum was inoculated into sterile medium containing 5% bauxite ore and the flask was incubated at 30 C on a rotary shaker at 240rpm to allow the growth of the cells and leaching of the ore. At regular intervals the solid residue of the

Sep 30, 2011 Thus, B. polymyxa plays a significant role in biobenficiation of bauxite mineral. These observations clearly indicated that a direct mechanism through bacterial attachment to the ore and an indirect mechanism through leaching with metabolites are involved in the biobeneficiation process

Jan 02, 2012 Microorganisms such as Paenibacillus polymyxa, Bacillus subtilis, Saccharomyces cerevisiae (yeast) and Desulfovibrio desulfuricans (SRB) are capable of significantly altering the surface chemical behavior of iron ore minerals such as hematite, corundum, calcite, quartz and apatite. Differing mineral surface affinities of microbial cells and