Results 81 to 90 of about 8,502 (265)

Natural Resources and Political Patronage in Africa: An Ethnicity Level Analysis

Review of Development Economics, EarlyView.
ABSTRACT We investigate the effect of resource discoveries on ethnicity‐level political patronage in Africa using a large geospatial dataset of 254 ethnic groups in 15 countries over the period 1960–2004. We find that the first (or single first) resource discovery in a virgin ethnic homeland increases the share of cabinet posts of that ethnicity.
Sambit Bhattacharyya, Nemera Mamo
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, Annelies Malfliet, Bart Blanpain, Petros E. Tsakiridis, Alan H. Tkaczyk, Vicky Vassiliadou, Dimitrios Panias   +6 more
openaire   +1 more source

Kinetics Study on the Hydrogen Reduction of Bauxite Residue-Calcite Sintered Pellets at Elevated Temperature

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, Casper van der Eijk, Jafar Safarian   +2 more
doaj   +1 more source

Sintering characteristics of red mud compact [PDF]

, 2007
Scientific inventions & technological developments has raised the human life to a great height. In last few decades worldwide scientific & technical innovations for processing/development/utilization of new materials (as per the need of the society), is ...
Panigrahi, Sushil, Sutar, Satyabrata
core  

Microbially generated ferruginous crusts: A potential biosignature of continental input in coastal settings

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, Renata Guimarães Netto, Alisson Klayton Martins   +2 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, Wenhui Ma, Pengfei Li, Zhanwei Liu, Hengwei Yan   +4 more
openaire   +1 more source

Enhancing solidification in one-part geopolymer systems through alkali-thermal activation of bauxite residue and silica fume integration

Case Studies in Construction Materials
This work describes the synthesis of geopolymers, a family of amorphous alumino-silicates, employing Silica fume and bauxite waste as precursor materials in an alkali-activated polycondensation reaction and the investigation of their properties.
Harini Konduru, S Karthiyaini
doaj   +1 more source

Use of bauxite residue (red mud) as a low cost sorbent for sulfide removal in polluted water remediation [PDF]

, 2016
Sulfide is an important pollutant in aqueous systems. Sulfide removal from polluted waters is required prior to discharge. Red mud RM) is a solid waste of bauxite processing that is rich in reactive iron oxides and consequently has the potential to be ...
APHA, Burke, Burke, Dutta, Ghosh, Ian T. Burke, Jacukowicz-Sobala, Lehoux, Li, Mišík, Morse, Nath, Poulton, Poulton, Qiyao Sun, Qu, Robert J. G. Mortimer, Ruichuan Sun, Sahu, Stepova, Talei, Tsang, Wang, Wang, Yanqing Sheng   +24 more
core   +1 more source

The Promise of Solid Lubricants for a Sustainable Future

Advanced Materials, Volume 38, Issue 8, 6 February 2026.
Lubricants are vital for technology, saving energy and resources. The industry seeks sustainable solutions beyond fossil fuels. Solid lubricants offer extremely low friction and reduce environmental impact, especially in harsh conditions. Can these solids truly replace liquid lubricants, or are they limited to extreme applications?
Philipp G. Grützmacher, Andrey A. Voevodin, András Korényi‐Both, Maria Clelia Righi, Christopher DellaCorte, Nazlim Bagcivan, Ali Erdemir, Carsten Gachot   +7 more
wiley   +1 more source

Full Analysis of Sierra Leone Bauxite and Possibilities of Bauxite Residue Filtration

Journal of Siberian Federal University. Engineering & Technologies, 2016
Chemical analysis, classical or instrumental using ICP and the XRF spectrometry, offers complete information on elemental composition and major chemical constituents of bauxite and bauxite residues resulted from the Bayer process. The XRD diffractometric analysis provides information on quantitative mineralogical composition of these materials and it ...
Dobra, Gheorghe, Kiselev, Anatoly, Filipescu, Laurentiu, Alistarh, Vicol, Anghelovici, Nicolae, Iliev, Sorin   +5 more
openaire   +2 more sources