Results 171 to 180 of about 253,149 (212)

Bauxite Residue Management

2012
With some two to four tonnes of bauxite residue arising for every tonne of aluminium produced, the management of bauxite residue (or Red Mud) has always been a significant issue for the aluminium industry. However, the tragic fatal incident in Ajka, Hungary in October 2010 has reinforced the need for safe and effective management of storage areas ...
Ken Evans, Eirik Nordheim, Katy Tsesmelis   +2 more
openaire   +1 more source

In situ neutralisation of uncarbonated bauxite residue mud by cross layer leaching with carbonated bauxite residue mud

Journal of Hazardous Materials, 2011
Unameliorated residue mud from the Bayer process generates highly alkaline leachates (pH ca. 13) after deposition in storage areas. Pre-deposition treatment of bauxite residue mud (BRM) with CO(2) gas (carbonation) lowers leachate pH to ca. 10.5. Laboratory scale leaching columns were used to investigate the potential for in situ pH reduction in ...
Santini, T. C., Hinz, C., Rate, A. W., Carter, C. M., Gilkes, R. J.   +4 more
openaire   +5 more sources

A field assessment of bauxite residue rehabilitation strategies

Science of The Total Environment, 2019
Bauxite residue, the by-product of the alumina industry, is mainly stored in land-based bauxite residue disposal areas (BRDAs). Environmental concern has been raised due to the large volumes in stockpile, the high alkalinity of the material, as well as the presence of elevated concentrations of trace elements.
Elisa Di Carlo, Amiel Boullemant, Ronan Courtney   +2 more
openaire   +2 more sources

Manufactured soil: A new use for bauxite residue

Science of The Total Environment
Bauxite processing residue produced at an Alumina refinery was used to produce manufactured soil. The residue was first acidified and then leached to remove excess salts. Green waste compost was added at rates of 5 and 10 % w/w, with or without the addition of 20 % w/w dune sand.
Weng, X., Haynes, R. J., Zhou, Y. F.
openaire   +3 more sources

Alkalinity conversion of bauxite refinery residues by neutralization

Journal of Hazardous Materials, 2010
Red mud remains the largest environmental issue for the alumina industry due to its high pH (>13), fine-grained nature (>90% is 50 g/kg), and soluble alkalinity (approximately 30 g/kg as equivalent CaCO(3)), which reduce the transport and reuse options of red mud.
Johnston, M, Clark, M W, McMahon, P, Ward, N   +3 more
openaire   +3 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

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

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

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

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