Results 191 to 200 of about 7,380 (225)

Seawater Neutralization of Alkaline Bauxite Residue and Implications for Revegetation

Journal of Environmental Quality, 2004
ABSTRACTReaction of bauxite residue with seawater results in neutralization of alkalinity through precipitation of Mg‐, Ca‐, and Al‐hydroxide and carbonate minerals. In batch studies, the initial pH neutralization reaction was rapid (<5 min), with further reaction continuing to reduce pH for several weeks.
Menzies, N. W., Fulton, I. M., Morrell, W. J.   +2 more
openaire   +5 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   +4 more sources

Potential Application of Treated Bauxite Residue

2021
Bauxite residue is a significant industrial solid waste residue produced by the Bayer process for the extraction of alumina from bauxite ores. It is usually disposed off in the form of slurry in the nearby areas of the alumina industry. About 400 million tons of bauxite residues are produced annually worldwide.
Sujeet Kumar, Abhay Kumar Verma, Arun Prasad   +2 more
openaire   +1 more source

Transforming bauxite residue into soil

2016
The annual production of red mud, a by-product from the Bayer process of alumina production, is estimated at 120 Mt. Red mud deposit could be bioremediated (Grafe and Klauber 2011). A low cost and sustainable in situ remediation method for transformation of bauxite residue into soil is designed and tested.
Hennebert, Pierre, Chen, C., Said Ali Mohamed, Fadaank, Poizat, Laurent   +3 more
openaire   +3 more sources

Comparison of the Rheology of Bauxite Residue Suspensions

2016
The paper presents an overview on the rheology of bauxite residue suspensions. Comparative viscosity and yield stress data are presented for bauxite residues generated in Australia, Jamaica, Surinam, and the USA. A yield stress for optimum dry disposal is specified as is the concentration for minimum energy consumption for the pumping of the four ...
N. Pashias, D. V. Boger, J. Summers, D. J. Glenister   +3 more
openaire   +1 more source

An Ecological Approach to the Rehabilitation of Bauxite Residue

2019
Bauxite residues can pose an environmental risk mainly because of their alkaline nature and the presence of trace elements. Phytostabilization seems to be a promising rehabilitation option and physicochemical assessment remains the primary indicator of rehabilitation success.
Elisa Di Carlo, Ronan Courtney
openaire   +1 more source

An ecological assessment of rehabilitated bauxite residue

Ecological Engineering, 2014
Abstract Assessment of soil biological communities and activity may be a valuable indicator of ecological stress and ecosystem function in rehabilitated bauxite residues. Establishment of keystone species and evidence of processes such as decomposition have been demonstrated on a number of mine spoil types but not on alkaline, sodic bauxite residue.
R. Courtney, E. Feeney, A. O’Grady
openaire   +1 more source

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   +1 more source

Induction of Biological Activity in Bauxite Residue

2016
Bauxite residue lakes constitute the major environmental problem at alumina processing plants because their high alkalinity content is hostile to flora and fauna. Bench experiments have been conducted to determine if bauxite residue can be made non-hostile through biological activity.
F. S. Williams, M. K. Hamdy
openaire   +1 more source

Environmental Management by Recycling of Bauxite Residue

Journal of Advanced Manufacturing and Processing
ABSTRACT Bauxite residue is an industrial by‐product generated during alumina production from bauxite ore through the Bayer process. The worldwide stockpiles of bauxite residue are expected to reach 10 billion tons by 2050 if not processed effectively.
Himanshu Tanvar, Brajendra Mishra
openaire   +1 more source