Results 71 to 80 of about 7,334 (224)
Microbial diversity in engineered haloalkaline environments shaped by shared geochemical rrivers observed in natural analogues [PDF]
, 2015 Microbial communities in engineered terrestrial haloalkaline environments have been poorly characterized relative to their natural counterparts and are geologically recent in formation, offering opportunities to explore microbial diversity and assembly ...
Kendra, Kathryn E. +2 more
core +1 more source
Sedimentology, EarlyView.ABSTRACT Thin ferruginous sandy crusts are common on top of sandstone beds in the Early Permian post‐glacial deposits of the Paraná Basin in southern Brazil. These crusts usually preserve wrinkle structures, suggesting that they might be a product of microbial mediation.
Patrícia Weschenfelder +2 more
wiley +1 more source
Bauxite Residue: A viable filler for asphalt mix
Građevinar, 2022 Bauxite residue or red mud is used as surrogate filler for stone dust in asphalt concrete mixes. Asphalt mixes with both fillers were designed and strength, volumetric properties, and performance against various distresses (rutting, cracking, long-term ...
Jayvant Choudhary +2 more
doaj +1 more source
High Temperature Treatment of Selected Iron Rich Bauxite Ores to Produce Calcium Aluminate Slags
Materials Proceedings, 2021 The Pedersen process is a method to produce alumina from Al-containing sources, and it is a more material-efficient method than the current commercial Bayer process, since the formation of bauxite residue (red mud) is avoided, and the bauxite can be ...
Adamantia Lazou +7 more
doaj +1 more source
ChemistryOpen, Volume 15, Issue 5, May 2026.Coal fly ash (CFA) is an abundant industrial waste rich in silica and alumina and represents a viable feedstock for zeolite synthesis; however, high levels of calcium and iron limit zeolite purity and crystallisation. This study evaluates acid refluxing and acid roasting as pre‐treatment strategies for the simultaneous removal of Ca and Fe from high ...
Emmanuel Monkgomotsi Victor Gaolefufa +4 more
wiley +1 more source
Rare Earth Element Phases in Bauxite Residue [PDF]
Minerals, 2018 The purpose of present work was to provide mineralogical insight into the rare earth element (REE) phases in bauxite residue to improve REE recovering technologies. Experimental work was performed by electron probe microanalysis with energy dispersive as well as wavelength dispersive spectroscopy and transmission electron microscopy.
Johannes Vind +6 more
openaire +1 more source
Metals, 2023 In this study, the isothermal reduction of bauxite residue-calcite sintered pellets by hydrogen at elevated temperatures and different gas flow rates was investigated.
Manish Kumar Kar +2 more
doaj +1 more source
Resource recovery and remediation of highly alkaline residues : a political-industrial ecology approach to building a circular economy [PDF]
, 2017 Highly alkaline industrial residues (e.g., steel slag, bauxite processing residue (red mud) and ash from coal combustion) have been identified as stocks of potentially valuable metals.
Baxter, Helen +4 more
core +4 more sources
Tectonics, Volume 45, Issue 5, May 2026.Abstract The paleomagnetism of Miocene calc‐alkaline volcanics and sediments from Sardinia has firmly showed that the Corsica‐Sardinia microplate rotated 50°–60° counterclockwise (CCW) with respect to Europe between 21 and 15 Ma, during its drift from the Provencal margin. However, Permian to Eocene rocks from central‐south Sardinia revealed higher (up
Gaia Siravo +3 more
wiley +1 more source
Alkali Recovery of Bauxite Residue by Calcification
Minerals, 2022 Bauxite residue (red mud) generated during alumina production is a highly alkaline solid waste. The red mud is mainly stored on land, but it can cause harm to the surrounding environment and human health. The transformation of red mud into soil is a feasible method for the large-scale disposal of red mud, but alkali removal is the key process that ...
Wanzhang Yang +4 more
openaire +1 more source