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Oct 22, 2018· AbstractCoal is one of the most important sources of fossil energy on earth. However, direct combustion of coal with a high sulfur content can cause various environmental problems. Other constituents of coal that can cause environmental problems include iron oxide (hematite), iron hydroxide, and silica. In this study, growing and …
Data indicated that inoculations of these fungi to the coal are cheap and impurity removals were faster than autotrophic bacteria, and it is speculated that they are excellent candidates for bioleaching of coal, oil, and gas. Coal is the most abundant fossil fuel containing sulfur and other elements which promote environmental pollution after burning. Also the silicon …
Feb 02, 2019· The principal constituent mineral has been reported to be goethite, with minor quantities of haematite, maghemite, siderite, quartz, kaolinite, pyrite, and an average of 0.09% S [ 8, 9, 73 ]. The Agbaja iron ore is also reported to have a high phosphorus content in the range of 0.76–2.13% [ 25, 26, 75] which makes its use in iron making in ...
In chalcocite (Cu 2 S) bioleaching, the lack of iron metabolism is a key restricting factor. As the most common sulfide mineral, pyrite (FeS 2 ) can release Fe(Ⅱ) and compensate for the iron metabolism deficiency in chalcocite bioleaching. The bioleaching of …
Bioleaching experiments of phosphorus from low grade fluorapatite ore containing 8.2% P2O5 and from fluorapatite concentrate containing 29.8% P2O5 were carried out in shake flasks. Elemental sulphur was supplemented as an energy source for acid generation. Mixed and pure acidophilic bacterial cultures consisting of iron-and/or sulphur-oxidizing …
Abstract. Coal is the most abundant fossil fuel containing sulfur and other elements …
Oct 01, 2010· The average contents of phosphorus and iron in the bioleaching solid residues were 0.21 and 51.7% (w/w), respectively. The average removal percentage of phosphorus and percentage of iron lost were 82.3 and 1.7%, respectively. After bioleaching, the high-phosphorus iron ore was suitable to be used in the manufacture …
Jan 01, 2016· After optimizing the experimental conditions, it was demonstrated that in addition to sulfur, more than 80% of phosphorus, another important impurity, was also removed from the iron ore concentrate.
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Oct 08, 2020· The highest extraction level of 90 g lead dissolved/kg galena concentrate was achieved using direct bioleaching method at bioleaching conditions of 2% w/v pulp density, 5 g/L FeCl 3, 50 g/L NaCl, 20 g/L …
Nov 13, 2022· Table 1 lists a selection of studies in which chalcopyrite bioleaching with chloride ions was investigated along with the highest copper extraction achieved in these studies. Chang-Li et al. (2012) reported high copper recoveries by using the thermophilic archaea Acidianus manzaensis, when bioleaching a chalcopyrite concentrate, at 65 °C …
per year. The minerals in the iron ore are mainly of magnetite and hematite, but many of the iron ore rocks and mines contain sulfide minerals such as pyrite, chalcopyrite, arsenopyrite, etc. The sulfur content of iron ore concentrates is generally about 0.5% to 2%, and sometimes more than 0.7%, while the permitted limit of steel industries is
It appears that for one mechanism to occur, the other has to occur alongside. A cooperative leaching seems to be the key of the bioleaching of iron sulfides (Mahmoud et al., 2017; Tributsch, 2001). Recent studies have redefined the biooxidation mechanisms as the thiosulfate pathway and the polysulfide pathway (Sand et al., 1999, 2001). These …
Abstract: Iron ore is the raw material for steel production, in addition to iron and slag major component, still contains sulfur and phosphorus …
Oct 22, 2018· AbstractCoal is one of the most important sources of fossil energy on earth. However, direct combustion of coal with a high sulfur content can cause various environmental problems. Other constituents of coal that can cause environmental problems include iron oxide (hematite), iron hydroxide, and silica. In this study, growing and …
bioleaching iron ore sulfur phosphorus silica. Nov 15, 2012 0183 32 phosphorus impurity in iron ore This page is provide professional phosphorus impurity in iron ore, sulfur and phosphorus in the iron ore, as the silica and phosphorus content of iron ore, »More detailed...
Feb 16, 2016· Bioleaching can involve numerous ferrous iron and sulfur oxidizing bacteria, including Acidithiobacillus ferrooxidans (formerly known as Thiobacillus ferrooxidans) and Acidithiobacillus thiooxidans (formerly known as Thiobacillus thiooxidans).In leaching, Fe 3+ ions are used to oxidize the ore. Here the fungi were …
Nov 10, 2022· Currently, mining operations have increased the generation of tailings, which contain a variety of elements that can be valorized. In this research, tailing samples were leached with hydrochloric acid of concentrations greater than 3 M, considering the monitoring of iron, copper, aluminum, calcium and magnesium, as relevant elements of …
Iron ore is the raw material for steel production, in addition to iron and slag major component, still contains sulfur and phosphorus compounds and other harmful elements, is the potential adverse effects of factors …
Nov 01, 2015· Request PDF | Study on Bioleaching of Sulfur in Iron Ore by Mixed Culture | Iron ore is the raw material for steel production, in addition to iron and slag major component, still contains sulfur ...
The bioleaching process of phosphorus in a kind of phosphorus-containing iron ore, belong to ore dressing field, it is characterized in that earlier phosphorus-containing iron ore being crushed to granularity 0.075-1.0mm, at 500-1200 ℃ of roasting 15-120 minute, regulating the ore pulp mass concentration with the water that contains mineral ...
Bioleaching experiments of phosphorus from low grade fluorapatite ore containing 8.2% P2O5 and from fluorapatite concentrate containing 29.8% P2O5 were carried out in shake flasks. Elemental sulphur was …
Compared with original sample, sulfur content decreased 95.06%, iron grade increased by 9.25%, and iron recovery was 94.13%. From the results it can be concluded that this microbial process for high sulfur iron ore …
Oct 01, 2010· Before bioleaching, the contents of phosphorus and iron from the high-phosphorus iron ore used were 1.04 and 47.89% (w/w), respectively. The effects of ore solid concentration on the phosphorus ...
Oct 04, 2016· The shift of microbial communities and their roles in sulfur and iron cycling in a copper ore bioleaching system. Sci. Rep. 6, 34744; doi: 10.1038/srep34744 (2016).
Coal is the most abundant fossil fuel containing sulfur and other elements which promote environmental pollution after burning. ... Heterotrophic Bioleaching of Sulfur, Iron, and Silicon Impurities from Coal by Fusarium oxysporum FE and Exophiala spinifera FM with Growing and Resting Cells Curr Microbiol. 2016 Jun;72(6):707-15. doi: 10.1007 ...
