Results 21 to 30 of about 31,421 (268)

Limited role of sessile acidophiles in pyrite oxidation below redox potential of 650 mV

open access: yesScientific Reports, 2017
Pyrite oxidation by mixed mesophilic acidophiles was conducted under conditions of controlled and non-controlled redox potential to investigate the role of sessile microbes in pyrite oxidation.
Chang Liu   +6 more
doaj   +1 more source

Observation of an Internal p-n Junction in Pyrite FeS2 Single Crystals: Origin of the Low Open Circuit Voltage in Pyrite Solar Cells

open access: yes, 2020
Pyrite FeS2 has long been considered a potentially ideal photovoltaic material, but solar cells utilizing pyrite exhibit low open-circuit voltages (VOC) and have failed to achieve conversion efficiencies >3 %.
Chris, Leighton   +7 more
core   +1 more source

The Morphological Characteristics of Authigenic Pyrite Formed in Marine Sediments

open access: yesJournal of Marine Science and Engineering, 2022
Pyrites are widely distributed in marine sediments, the morphology of which is applied as a proxy to infer the redox conditions of bottom water, and identify diagenetic stages and hydrocarbon leakage activities.
Jingyi Chang, Yuanyuan Li, Hailong Lu
doaj   +1 more source

Role of organic matter in framboidal pyrite oxidation [PDF]

open access: yes, 2006
An experimental system has been set up to investigate the reaction kinetics of framboidal pyrite oxidation in real, reactive acid sulfate soil assemblages.
Cook, Freeman J.   +3 more
core   +1 more source

DFT Study into the Influence of Carbon Material on the Hydrophobicity of a Coal Pyrite Surface

open access: yesMolecules, 2019
From the macroscopic point of view, the hydrophilicity of symbiotic carbon pyrite is weakened overall compared to that of pure pyrite. It is very important to explain the impact of elemental carbon accreted on a pyrite surface on the surface’s ...
Peng Xi   +3 more
doaj   +1 more source

Gradational development of slaty cleavage to schistosity -an example from the Iberian Pyrite Belt, Spain-

open access: yes, 1994
The Iberian Pyrite Belt is an Upper Paleozoic succession which has been divided into the Phyllite-Quartzite Group, the Volcanic-Sliceous Complex and the Culm Group in ascending order from base to the top. The contacts among them are conformable.
Suzuki, shigeyuki
core   +1 more source

Iodide interaction with natural pyrite [PDF]

open access: yes, 2011
29I is one of the major dose-determining nuclides in the safety analysis of deep storage of radioactive waste. Iodine forms anionic species that hardly sorb on the surfaces of common host-rock minerals. Recently, interest has arisen on the role of pyrite,
Curti, Enzo   +5 more
core   +1 more source

Influence of indigenous mixotrophic bacteria on pyrite surface chemistry: Implications for bioflotation

open access: yesMicrobiology Indonesia, 2020
Given the low-cost and eco-friendly method, biotechnology has been widely utilized in industries as an alternative for physical and chemical processes, including in the biomining process (e.g., bioflotation and biobeneficiation).
Edy Sanwani   +5 more
doaj   +1 more source

Desulphurization of coals of different ranks in the presence of slimes by reverse flotation

open access: yesEnergy Reports, 2019
In this paper, the flotation separation of pyrite from sub-bituminous and meta-bituminous coals in the presence of slimes was investigated. The sub-bituminous coal and the meta-bituminous coal have significant differences in their surface properties ...
You Zhou   +5 more
doaj   +1 more source

Pyrite/H2O2/hydroxylamine system for efficient decolorization of rhodamine B

open access: yesWater Science and Technology, 2021
To improve the efficiency of the Fe(II)/Fe(III) cycle and continuous reactivity of pyrite, a pyrite/H2O2/hydroxylamine (HA) system was proposed to treat rhodamine B (RhB).
Guang-Jun He   +5 more
doaj   +1 more source

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