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Pyrite oxidation is considered to be a main contribution to the acidification of minesite spoils and the generation of the Acid Mine Drainage (AMD) which has become the greatest threat to the ecological environment. In this paper, pyrite oxidation and its controls are reviewed with respect to ...
Pyrite nodules up to 20 cm in diameter are found at the top of the Marinoan (~ 635 Ma) Nantuo glacial diamictite as well as in the cap dolostones and shale/siltstones in the lower Doushantuo Formation in eastern Guizhou, southern China. Fiel
Osteosarcoma (OS) is a primary malignant bone tumor, which is one of the most common malignant tumors in young adults and children [1]. OS can cause disability and death in children and adolescents due to its strong invasive activity, rapid metastasis, high recurrence rate, and poor prognosis...
nd its reactivation 96/05845 Deactivation of pyrite FeS2 catalyst with oxidation and its reactivation96/05845 Deactivation of pyrite FeS2 catalyst with oxidation and its reactivationdoi:10.1016/s0140-6701(97)83265-1NoneELSEVIERFuel and Energy Abstracts...
Neutral to alkaline fluids have the ability to effectively mobilise and transport Te. Fluid boiling in porphyry-epithermal systems, as well as wall rock sulphidation and oxidation in Carlin-type (and orogenic Au) deposits can effectively precipitate Te in association with pyrite and Au. In ...
In hydrothermal environments, magnetite might be affected by sulfide delivered from hot and acidic fluids (up to ~400 °C; pH 2–5)32and microbial sulfur cycling33, likely exerting a dominant control on its preservation34. This is because sulfide can drive the rapid reductive dissolution of ...
For example, the acid mine drainage occurred as a result of pyrite oxidation in the presence of H2O and O2. Pyrite is considered as a primary energy supplier for primitive life (Wachtershauser, 1988). Further, pyrite shows intrinsic conductivity and high light absorption capacity (Ennaoui et ...
As a basis for safety assessments of geological disposal of high-level radioactive waste, the oxidation behavior of pyrite during drying of bentonite was studied. There was a decrease in the quantity of pyrite in the bentonite during the drying, together with a decrease in pH, and an increase...
Bioleaching is the dissolution of metal sulfides, such as pyrite and chalcopyrite, by bacterial oxidation processes. It has been found that attachment of l... B Florian,N No?L,W Sand - 《Minerals Engineering》 被引量: 37发表: 2010年 Control of redox potential by oxygen limitation in selecti...