Results 161 to 170 of about 253,149 (212)

Bauxite residue issues: II. options for residue utilization

Hydrometallurgy, 2011
Abstract Worldwide bauxite residue disposal areas contain an estimated 2.7 billion tonnes of residue, increasing by approximately 120 million tonnes per annum. The question of what to do with bauxite residue arose with the development of the Bayer process for alumina refining and the recognition that it generated a large amount of waste material.
Klauber, Craig, Gräfe, M., Power, G.
exaly   +5 more sources

Applications of bauxite residue: A mini-review

Waste Management & Research: The Journal for a Sustainable Circular Economy, 2017
Bauxite residue is the waste generated during alumina production by Bayer’s process. The amount of bauxite residue (40–50 wt%) generated depends on the quality of bauxite ore used for the processing. High alkalinity and high caustic content in bauxite residue causes environmental risk for fertile soil and ground water contamination.
Ajay S, Verma, Narendra M, Suri, Suman, Kant   +2 more
openaire   +3 more sources

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Dealkalization processes of bauxite residue: A comprehensive review

Journal of Hazardous Materials, 2021
Bauxite residue is a kind of strong alkaline waste produced in the production of alumina. Its long-term storage poses a potential threat to the environment. With the tightening of environment policies in various countries, the strong alkalinity of bauxite residue has become a bottleneck restricting the sustainable development of aluminum industry all ...
Li Wang, Fei Lyu, Yuehua Hu
exaly   +3 more sources

Advanced characterisation of bauxite residue

, 2018
Bauxite residue is the solid waste produced in the extraction of alumina from bauxite using the Bayer process. Questions on how to manage and utilise bauxite residue have been the subject of considerable research by both institutes and industry. Despite these efforts, efficient recovery of valuable components is difficult to achieve, partly due to the ...
Peng, H., Vaughan, J., Staker, W., Wang, J., Wen, W.   +4 more
openaire   +2 more sources

Accelerating Bauxite Residue Remediation with Microbial Biotechnology

, 2019
Biological neutralisation of pH, driven by the microbial fermentation of added organic carbon substrates such as glucose, has recently emerged as a promising technique for remediation of bauxite residue, dropping pH from >11 to
Santini, T. C., Warren, K., Raudsepp, M., Carter, N., Hamley, D., McCosker, C., Couperthwaite, S., Southam, G., Tyson, G. W., Warren, L. A.   +9 more
openaire   +5 more sources

A Study of the Occurrence of Selected Rare-Earth Elements in Neutralized–Leached Bauxite Residue and Comparison with Untreated Bauxite Residue

Journal of Sustainable Metallurgy, 2019
This study investigates the chemical associations of the selected rare-earth elements (Sc, Y, Ce, La, and Nd) with major element phases in the postprocessed bauxite residues and compares them with the untreated bauxite residue. The treatment of bauxite residue considers our previous published process which involved the neutralization with CO2, followed
Rivera, Rodolfo Marin, Ounoughene, Ghania, Malfliet, Annelies, Vind, Johannes, Panias, Dimitris, Vassiliadou, Vicky, Binnemans, Koen, Van Gerven, Tom   +7 more
openaire   +2 more sources

Extraction and Utilization of Valuable Elements from Bauxite and Bauxite Residue: A Review

Bulletin of Environmental Contamination and Toxicology, 2022
Bauxite is the ideal raw material for the manufacturing of alumina. Aside from the primary constituents of aluminum and silicon, bauxite is frequently coupled with many valuable elements such as gallium (Ga), titanium (Ti), scandium (Sc), and lithium (Li).
Yang, Chen, Ting-An, Zhang, Guozhi, Lv, Xi, Chao, Xuewei, Yang   +4 more
openaire   +2 more sources

Tar elimination from biomass gasification syngas with bauxite residue derived catalysts and gasification char

Applied Energy, 2020
Efficient elimination of tar is a challenge to the development of biomass gasification as a viable clean energy technology. Catalytic reforming is effective in reducing biomass-derived tars.
Xiaotao Bi, Naoko Ellis, Zhiqiang Wu
exaly   +2 more sources

Revealing the Mechanisms of Metal Adsorption by Bauxite Residue

Industrial & Engineering Chemistry Research, 2023
Acid treatment of bauxite residue (BR) has been one of the main approaches to enhance its metal adsorption performance. However, the acid treatment mechanisms remain poorly understood and is complicated by the variable and complex mineralogy of bauxite residue and different test conditions in previous studies.
Hong Peng, Ngoc Quy Vu, James Vaughan, Sicheng Wang, Shuai Gao   +4 more
openaire   +3 more sources

Kinetics of Bauxite Residue Sintering

2018
In the Bayer process for alumina production, between 2–35% Al2O3 is lost with bauxite residue due primarily to incomplete dissolution of aluminium-bearing minerals during caustic leaching or the precipitation of sodium alumino-silicate solids. The recovery of sodium and aluminium from the residue, and particularly from the contained sodium alumino ...
Hodge, Harrison, Hawker, William, Hayes, Peter, Vaughan, James   +3 more
openaire   +2 more sources