DOI: 10.1016/S0301-7516(96)00013-0 Corpus ID: 96994384; Biobeneficiation of bauxite using Bacillus polymyxa: calcium and iron removal @article{Anand1996BiobeneficiationOB, title={Biobeneficiation of bauxite using Bacillus polymyxa: calcium and iron removal}, author={P Neeraja Aparna Anand and Jayant M. Modak and Kiran Natarajan}, …
— The bauxite demand in India will grow albeit at a slow pace as alumina industry is growing at slower rate and the country has its own mines of medium grade …
— A soil bacterium Paenibacillus polymyxa was recently shown to selectively remove calcium and iron impurities from low grade bauxite (< 50% Al), for abrasive and …
The primary objective of beneficiation for non-metallurgical bauxite is to lower iron and titanium contents in the product, and also to enhance alumina values. This often …
— Two highly effective Si-solubilizing bacterial strains H19 and G21 were obtained. • H19 and G21 could significantly (p < 0.05) remove Si from the high Si bauxite.The ratio of Al 2 O 3 /SiO 2 of the bauxite treated with H19 and G21 was more than nine.. H19 and G21 produced organic acids and EPS during the bio-desilication process.
— The Parnassos-Ghiona bauxite deposit in Greece of karst type is the 11th largest bauxite producer in the world. The mineralogical, major and trace-element contents and δ18O, δ12C, δ34S isotopic compositions of bauxite ores from this deposit and associated limestone provide valuable evidence for their origin and biogeochemical …
— This paper describes some of the important microbiological and engineering challenges in scaling up biobeneficiation of bauxite. A soil bacterium Paenibacillus …
— Bauxite is the major alumina (Al2O3) bearing ore used in the aluminum manufacturing industries. The bauxite containing less than 50% Al2O3 is called low-grade bauxite ore, which is commonly used ...
— Water security in India faces several issues and challenges that threaten the sustainability and development of the country. These include over-extraction of groundwater, water pollution, inadequate distribution, lack of proper water management, climate change, and conflicts over water. India relies heavily on groundwater, which is …
present in bauxite are silicon, iron oxides, and calcium 19,22 which causes many processing ... Bauxite reserves of India are the 5th largest in the world. It has a wide distribution throughout
— Bioleaching of low-Ca bauxite by all approaches showed REE recovery similar in extent and trend to the sequential extraction data, including the highest recovery of Ce to Sm (Figure 2). This suggests that …
Application of biomaterials in the metal beneficiation technique, especially for the removal of different impurities from the low-grade bauxite, is a suitable alternative to overcome the …
— As per the latest data released by the Ministry of Mines, Government of India, mineral production in India rose by 10.9 per cent year-on-year in May 2022 led by a sharp jump in the output of coal, gold, phosphorite, and bauxite. India's mining sector has vast potential given it produces 95 minerals, including 10 metallic and 23 non-metallic. …
— By Samarendra Das and Felix Padel (Article for 'The Global Economic History of Bauxite', Canada 2010) Most critiques of the aluminium industry focus on refineries and smelters, which are among the worst culprits of global heating. But bauxite mining excavates a huge surface area, and has caused environmental devastation in …
— The best calcined bauxite is produced in India by importing high quality Guyana washed ore. There are opportunities to beneficiate metallurgical grade bauxite, …
— Bauxite is the main source of the world's most abundant metal aluminum, and low-grade bauxite (<50% Al) is used in the manufacture of alumina-based abrasives and refractories. The bauxite ore ...
— India is at a tipping point, both in terms of economic growth and in the human development of its more than one billion citizens. The country is the sixth largest economy in the world, with a GDP of $2.6 trillion in 2017. Its GDP growth rate for 2019 is projected to be almost 7.5%, as it continues to be a major engine of global economic growth.It does …
— India is endowed with more than 3000 million tons of bauxite resources. Out of total India reserves, about 70% reserves are concentrated in Eastern Ghats (Odisha and Andhra Pradesh) region. Majority of the Eastern Ghat bauxite deposits are located at high altitude (high level type) and have been developed on khondalite and charnockite group …
— A 2011 study estimated that India has roughly 20 health workers per 10,000 population, with allopathic doctors comprising 31% of the workforce, nurses and midwives 30%, ... The five as presented above present challenges to the health of the public in our glorious country. As we get ready to face a future which is full of possibility and ...
— At the same time, many of India's manufacturing value chains enjoy important advantages that could help power them to rapid growth. India's natural resources (for example, iron ore, bauxite, high solar insolation, and cotton) and low-cost labor are a boon to makers of basic metals, textiles and apparel, renewable energy, and chemical …
— This paper describes some of the important microbiological and engineering challenges in scaling up biobeneficiation of bauxite.A soil bacterium Paenibacillus polymyxa was recently shown to selectively remove calcium and iron impurities from low grade bauxite (<50% Al), for abrasive and refractory applications, respectively. An industrial …
— 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. For …
— Bauxite is the major alumina (Al2O3) bearing ore used in the aluminum manufacturing industries. The bauxite containing less than 50% Al2O3 is called low-grade bauxite ore, which is commonly used ...
— The biggest challenge of microbial methods to date is, on the one hand, to provide a cheap and available substrate for the growth of these microorganisms and, on the other hand, to optimize the growth conditions and improve recycling efficiency in microbial methods. ... Bauxite is the main mineral in current bio-leaching research, and there are ...
— In this review, current developments in the biobeneficiation of iron ore minerals are considered, and potential solutions to challenges faced in the wider adoption of this technology are proposed. The quest for quality mineral resources has led to the development of many technologies that can be used to refine minerals.
— This paper describes some of the important microbiological and engineering challenges in scaling up biobeneficiation of bauxite. A soil bacterium Paenibacillus polymyxa was recently shown to selectively remove calcium and iron impurities from low grade bauxite (<50% Al), for abrasive and refractory applications, respectively.
— Bacterial isolates exhibited calcium-dependent metabolism, utilizing calcium to produce amylases to synthesize a dipicolinate. Significant generation of extracellular …
Abstract. This paper describes some of the important microbiological and engineering challenges in scaling up biobeneficiation of bauxite. A soil bacterium Paenibacillus …
This conflict has been a well-known case in the mineral-rich state of Odisha in India, involving some of the world's oldest surviving indigenous peoples. The Dongria tribe of Eastern India has been under intense pressure from the state government as well as Vedanta, a London based mining company, to make way for bauxite mining.
A microbial survey of Jamnagar bauxite mines in Gujarat, India, revealed the indigenous presence of a variety of autotrophic and heterotrophic bacteria and fungi associated with the ore body and water ponds in the vicinity. Among these, bacteria belonging to the genera Thiobacillus, Bacillus and Pseudomonas are implicated in the weathering of …
— The present study performed a continuous mode of bioleaching to investigate the leaching efficiency of Titanium (Ti) from bauxite residue using Penicillium Tricolor at between 4% and 12% pulp ...
The value of mineral production in India covering fuel, metallic, non-metallic and minor minerals rose spectacularly during the last 8 decades since 1950 and touched the level of Rs. 1,65,326 crores in 2019-20 and the level of Rs 1,58,869 crores in 2020-21 respectively (Table-12). The increase in the value was
— Removal of silica and alumina from two typical Indian iron ore deposits using biobeneficiation is demonstrated. The Kudremukh iron ore deposits situated in Karnataka, India have high silica (mainly as quartz) content. The Bolani iron ores used by Steel Authority of India Limited (SAIL) have high alumina content (present as alumina and clays).
Bauxite is the most important raw material for production ... Science, Bangalore 560 012, India 123 Trans Indian Inst Met (2016) 69(1):15–21 DOI 10.1007/s12666-015-0597-6. 2 Biomineralization of Bauxites ... and iron present in bauxites can be used as energy sources by indigenous microbes. Role of various microorganisms
Role of indigenous microbes in the formation and conversion of bauxite minerals is illustrated and use of Paenibacillus polymyxa in the efficient removal of calcium from low grade bauxites is demonstrated through bioreactor technology. Role of indigenous microbes in the formation and conversion of bauxite minerals is illustrated. Many types of …
Bauxite Beneficiation: An Approach to Value Addition in Mining 101 Table 1 Size and chemical assay of lateritic bauxite Size mm Al2O3 % SiO2 % R–SiO2 % Fe2O3 % TiO2O3 % SiO2 % R–SiO2 % Fe2O3 ...
used in the manufacture ofrefractories and ceramics. India has one of the largest reserves of bauxite, most of which remains unexploited. Calcium and iron are the major impu rities present in Indian bauxiteores, which makes these ores unsuitable for direct use in refractory and ceramic manufac ture.
