8 results for “Reaction Department”
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Medical study · Medical research · 2014
Reaction mechanism for the aqueous-phase mineral carbonation of heat-activated serpentine at low temperatures and pressures in flue gas conditions
…microscopy (SEM) analysis. Investigation of the serpentinite carbonation reaction mechanisms under conditions close to a direct flue gas treatment showed that increased dissolution rates could be achieved relative to prior work, with an average Mg dissolution…
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Medical study · Medical research · 2010
Effect of secondary phase formation on the carbonation of olivine
…reactors. Altering the reaction conditions changed the Mg-carbonate morphology. We propose that this corresponded to changes in the ability of the system to precipitate hydromagnesite or magnesite. During high-temperature reactions (200 degrees C), an…
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Medical study · Medical research · 2004
Exploration of the role of heat activation in enhancing serpentine carbon sequestration reactions
…to an amorphous component that preferentially forms at higher temperatures. The aqueous carbonation reaction process was investigated for representative materials via in situ synchrotron X-ray diffraction. Magnesite was observed to form directly at 15 MPa…
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Medical study · Medical research · 2008
Magnesium hydroxide extracted from a magnesium-rich mineral for CO2 sequestration in a gas-solid system
Magnesium hydroxide extracted from magnesium-bearing minerals is considered a promising agent for binding CO2 as a carbonate mineral in a gas-solid reaction. An efficient extraction route consisting of hydrothermal treatment on serpentine in HCl…
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Medical study · Medical research · 2018
Atmospheric Carbon Mineralization in an Industrial-Scale Chrysotile Mining Waste Pile
…ultramafic mining waste have the potential to be used as a safe and permanent sequestration solution for carbon dioxide (CO2). Our understanding of thermo-hydro-chemical regimes that govern this reaction at an industrial scale, however…
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Medical study · Medical research · 2016
Microbially Accelerated Carbonate Mineral Precipitation as a Strategy for in Situ Carbon Sequestration and Rehabilitation of Asbestos Mine Sites
…stabilizing the tailings. Tailings were leached using sulfuric acid in reaction columns and subsequently inoculated with an alkalinity-generating cyanobacteria-dominated microbial consortium that was enriched from pit waters at the Woodsreef Mine. Leaching conditions that…
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Medical study · Medical research · 2001
Sorption of nonpolar aromatic contaminants by chlorosilane surface modified natural minerals
…headgroups and chemical properties. Silanol groups of the diatomite and zeolite were modified by chemical reaction with the chlorosilanes resulting in a stable covalent attachment of the organosilanes to the mineral surface. The alteration of surface…
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Medical study · Medical research · 2005
Fenten chemistry of Fe(III)-exchanged zeolitic minerals treated with antioxidants
…the Fenton reactivity of Fe(III)-exchanged erionite and mordenite after treatment with antioxidants. The Fenton assay involved the reaction of hydroxyl radicals with dimethyl sulfoxide. Fenton reactivity was most marked with AA followed by GSH…