Pyrite Oxidation
Effect of pH and Dissolved Silicate on the Formation of Surface Passivation Layers for Reducing Pyrite Oxidation
... on pyrite particles which have slowed pyrite oxidation as the reaction has proceeded, suggested by the oxidation rate data and solution ...of pyrite particles sampled from dissolution ...
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Inhibition of Microbial Pyrite Oxidation by PropS-SH for the Control of Acid Mine Drainage
... of pyrite with hydrogen ...uncoated pyrite medium a short initial lag phase (18 days) in microbial growth is observed, continuing through exponential phase to 39 days where the highest cell number reached ...
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The effect of adsorbed lipid on pyrite oxidation under biotic conditions
... the oxidation of pyrite and concomitant development of acidic ...the pyrite surface and in the aqueous phase at a pH close to 2 as well as the role of adsorbed lipid in preventing pyrite ...
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Effect of temperature and illumination on pyrite oxidation between pH 2 and 6
... of pyrite oxidation. For example, if pyrite is oxidized and most of the disul®de is converted to surface-bound elemental sulfur rather than sulfate then the rate of reaction may be ...the ...
11
An Electrochemical Study of Pyrite Oxidation in 0.1 M Sulfuric Acid at High Temperature and High Pressure
... pressure oxidation of pyrite mainly by examining the changes in the amount of reactants and products after the system was cooling down, reaction kinetics and mechanism were then deduced from such ...where ...
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Pyrite oxidation under initially neutral pH conditions and in the presence of Acidithiobacillus ferrooxidans and micromolar hydrogen peroxide
... of pyrite is molecular oxygen and ferric ion (Fe 3 + ); the latter is much stronger than the former in oxidizing pyrite (Moses et ...-driven pyrite oxidation is generally inhibited under ...
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Suppression of Pyrite Oxidation by Surface Silica Coating
... by pyrite surfaces and dissolved iron ions in the solution, but also is catalyzed heterogeneously due to the presence of precipitated amorphous and/or poorly crystalline iron hydroxides (McKibben & Barnes, ...
7
Electrochemical study on Surface Oxidation of Natural Pyrite in Ferric Sulfate Solution
... however, pyrite dissolution will not carry on if the dissolved oxygen in the solution are consumed out ...the pyrite surface acted as pyrite oxidant and it worked only (or at least predominantly) in ...
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An Electrochemical Study of Surface Oxidation and Collectorless Flotation of Pyrite
... surface oxidation and natural hydrophobicity play an important role in determining flotation performance for many minerals, particularly for sulfides and ...surface oxidation of fresh pyrite surface ...
12
An improved pyrite pretreatment protocol for kinetic and isotopic studies
... several pyrite oxidation studies, aimed at removal of sulfate and other soluble sulfur oxyanions ...of pyrite pretreatment ...of pyrite samples in ...of pyrite pretreatment pro- ...on ...
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A method for generating uniform size-segregated pyrite particle fractions
... previous pyrite oxidation experiments, the appearance of oxidation products on pyrite surfaces is most likely minor, given the short period of time in which the samples were in the oven ...of ...
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Silicate Covering Layer on Pyrite Surface in the Presence of Silicon Catechol Complex for Acid Mine Drainage Prevention
... of pyrite oxidation by carrier microencapsulation (CME) was ...treated pyrite samples showed that treatment with silicon catechol (Si-Cat) for 6 h at an initial pH of ...treated pyrite ...
9
Pyrite oxidization accelerates bacterial carbon sequestration in copper mine tailings
... (e.g., pyrite), and oxidation of these sulfide minerals leads to a decrease in pH, also known as mine tailing acidifica- ...sulfur oxidation in mine tailings, and these autotrophic taxa have leading ...
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Phase pure iron pyrite nanocrystals for low cost photodetectors
... those two samples, the reaction time is only 24 h. The ap- pearance of impurities is an indication of inadequate reac- tion time in this case. The average crystallite size of samples 1 and 2, calculated using size strain ...
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Some uses of the spontaneous polarization method
... Drill holes drilled on these and the previously described anomalies revealed sulphide and pyrite bodies.. due to obvious rea- sons.[r] ...
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Role of Ammonia on Structural, Electrical, FTIR and Optical Studies of Fes 2Films Formed by CBD
... Form the SEM images it was observed that films deposited at 10 M of AC had an inhomogeneous distribution of grains on the substrate with small grain size. However, at 14 M a regular distribution of large grains over the ...
6
Control of polyunsaturated fatty acid oxidation
... The polyunsaturated nitroalkanes in this work were to be synthesised from commercially available polyunsaturated alcohols, through the corresponding alkyl h a lid e s j1311 and subsequently to be used as starting ...
200
Flotation Behavior of Arsenopyrite and Pyrite, and Their Selective Separation
... Hallimond tube, by using xanthate as a collector. On this basis, the study further investigated the selectivity index of arsenopyrite and pyrite, using a mixed sample of arsenopyrite and pyrite. To examine ...
6
BIOFILM FORMATION BY ACIDITHIOBACILLUS FERROOXIDANS ON PYRITE ORE
... subsequent pyrite dissolution by the Gram-negative, non-spore forming rod, moderately thermophilic acidophile Acidithiobacillus ferrooxidans were ...the oxidation of pyrite (FeS 2 ) carried by using ...
7
A demonstration of an affinity between pyrite and organic matter in a hydrothermal setting
... Pyrite and organic matter in the Irish Carboniferous The Carboniferous rocks of Ireland contain numerous sulphide ore deposits, which also at some localities include visible accumulations of organic matter [14], ...
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