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Lepidocrocite (γ-FeOOH) bioreduction by Shewanella putrefaciens was examined in systems containing three kinds of quartz silica sand with solid contents ranging from 5 to 70wt.%. The results notably demonstrated that the formation routes of secondary iron minerals from microbial reduction of γ-FeOOH in silica mineral assemblages are dependent on quartz sand loading and particle size distribution....
Experiments of dissolution of siderite (FeCO 3 ) in pure water and in saline aqueous solution (“seawater” composition) have been performed at temperatures of up to 400°C in a maximum pressure range of 720–1150MPa, using an hydrothermal diamond anvil cell (HDAC). The reaction products were characterized in situ by Raman spectroscopy. At 250°C, in pure water system, we document formation of...
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