bauxite residue rehabilitation

Bauxite Mine Tailings and Alumina Refinery Residue Storage

Bauxite Mine Tailings and Alumina Refinery Residue Storage . Alcoa Corporation ("Alcoa") manages a global inventory of impoundment facilities used to store bauxite mine tailings and alumina refinery residue. These include active, inactive and closed sites wholly or


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In situ remediation of bauxite residue by sulfuric acid ...

This study investigated the optimum conditions and remediation of the bauxite residue. pH rebounding was observed after sulfuric acid neutralization of bauxite residue. Considering this rebound, the most suitable pH was set at 4.5. Washing remediated the residue to accomplish the goals for bauxite residue rehabilitation.

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Nitrogen and Phosphorus Dynamics in

bauxite residue. Global bauxite residue production is estimated at 120 million tons per annum with the establishment of sustainable vegetation cover systems (e.g. dust emission control crops) in residue storage areas (RSAs) as the key objective in rehabilitation activities.


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red mud | Alkaline Remediation

The paper "Advances in understanding environmental risks of red mud after the Ajka spill, Hungary" was just published in the Journal of Sustainable Metallurgy. This paper reviews the over 45 scientific studies published in the last 5 years assessing the key risks and impacts associated with the largest single release of bauxite residue to the environment – the 2010 Ajka red mud spill.

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Alumina Limited

Also, for each tonne of alumina produced approximately 2 tonnes of bauxite residue results. The goal is to reduce bauxite residue land requirements per unit of alumina by 15% by 2020 and 30% by 2030 and recycle or reuse 15% of residue generated by 2020 and 30% by 2030.

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Microbial Community Composition in a Rehabilitated Bauxite ...

The chemical composition of rehabilitated Bauxite Residue Disposal Areas (BRDA) remains the primary indicator of rehabilitation success, with little consideration of microbial community development.


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Bauxite Residue Management - Australian Aluminium Council

bauxite residue from all these plants is of the order of 120 million tonnes a year. There are approximately 30 Bayer alumina refineries that have closed and have left associated legacy bauxite residue sites. It is estimated that the amount of bauxite residue stored in operating and closed sites is some 3 billion tonnes. c. Composition


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Project MUSE - Rehabilitation of Red Mud Bauxite Wasteland ...

Mar 01, 2010 · The goal was to initiate a process of rehabilitation by establishing and sustaining vegetation growth and improving the physicochemical properties of the bauxite residue. The rehabilitation attempt was preceded by nursery experiments from January to December 2002 involving 13 treatment combinations of soil amendments and inoculants and five ...

  • Published in: Ecological Restoration · 2010Authors: Suresh Chauhan · Chandra Shekhar SiloriAffiliation: The Energy and Resources InstituteAbout: Red mud · Gypsum · Sustainability · Inoculation · Soil conditioner · Rehabilitation
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An Ecological Approach to the Rehabilitation of Bauxite ...

Abstract. 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.

  • Author: Elisa Di Carlo, Ronan Courtney
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Understanding desilication products in bauxite refinery ...

understanding desilication products in bauxite refinery residues Page ii Vishakya Jayalatharachchi 2016 Page ii Abstract Bauxite refinery residue (red mud) is a waste by-product generated by the extraction of alumina from bauxite ores [1-3]. Bauxite residue is generated through the Bayer

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Shifts in leaf N:P stoichiometry during rehabilitation in ...

Shifts in leaf N:P stoichiometry during rehabilitation in highly alkaline bauxite processing residue sand Johnvie B. Goloran1, ChengrongChen1, IanR. Phillips2 & James J.Elser 3 Large quantities of sodic and alkaline bauxite residue are produced globally as a by-product from alumina refineries.


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CSIRO PUBLISHING | Soil Research

Bray AB, Stewart DI, Courtney R, Rout SP, Humphreys PN, Mayes WM, Burke IT (2018) Sustained bauxite residue rehabilitation with gypsum and organic matter 16 years after initial treatment. Environmental Science & Technology 52, 152–161.

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The History, Challenges, and New Developments in the ...

May 19, 2016 · Reuse of bauxite residue has for long featured in the thinking of Bayer plant operators but in spite of over a century of endeavor and trials, only some 2–3 % of the 150 million tonnes of bauxite residue produced annually is used in a productive way.


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Investigation of Hydrological Behaviour of In Situ Bauxite ...

Bauxite Residue for Closure and Rehabilitation Design N. Amoah Worsley Alumina Pty Ltd, Australia J. Phillips GHD Pty Ltd, Australia S. Vlahos Worsley Alumina Pty Ltd, Australia 1 INTRODUCTION Over 20 million m³ of residue from the alumina refining industry are produced in Western Australia each year.

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Bauxite Residue Seminar field trip to Belgaum's ...

Bauxite Residue Characterization Bauxite Residue Processing, Storage and Storage Area Rehabilitation Bauxite Residue as Feedstock The Round Table Discussion at the end of the second day resulted in the Summary and Conclusions document.


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Journal of Environmental Quality Abstract - Waste Management

Plant-available manganese in bauxite residue sand amended with compost and residue mud Soil Research 2012 50:5 Development of Microbial Diversity and Functional Potential in Bauxite Residue Sand under Rehabilitation Restoration Ecology 2011 19:101

  • Published in: Journal of Environmental Quality · 2004Authors: Neal W Menzies · I Fulton · W J MorrellAffiliation: University of Queensland · AlcanAbout: Adverse effect · Carbonate · Nutrient · Acid sulfate soil · Revegetation · Alkalinity
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Sustained Bauxite Residue Rehabilitation with Gypsum and ...

Bauxite residue is a high volume byproduct of alumina manufacture which is commonly disposed of in purpose-built bauxite residue disposal areas (BRDAs). Natural waters interacting with bauxite residue are characteristically highly alkaline, and have elevated concentrations of Na, Al, and other trace metals. Rehabilitation of BRDAs is therefore often costly and resource/infrastructure intensive.

Microbial Community Composition in a Rehabilitated Bauxite ...

The chemical composition of rehabilitated Bauxite Residue Disposal Areas (BRDA) remains the primary indicator of rehabilitation success, with little consideration of microbial community development.

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An ecological assessment of rehabilitated bauxite residue ...

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.

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Latest ES&T paper demonstrates long term effectiveness of ...

Dec 15, 2017 · Bauxite residue is a high volume, alkaline waste produced by the alumina industry. Sustainable management strategies for waste depositories are imperative to prevent environmental risk and to rehabilitate the land. Our latest paper in the leading journal Environmental Science and Technology shows how simple amendment of the alkaline, saline metal-rich residue with a layer of.


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red mud | Alkaline Remediation

The paper "Advances in understanding environmental risks of red mud after the Ajka spill, Hungary" was just published in the Journal of Sustainable Metallurgy. This paper reviews the over 45 scientific studies published in the last 5 years assessing the key risks and impacts associated with the largest single release of bauxite residue to the environment – the 2010 Ajka red mud spill.

[PDF]
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CSIRO PUBLISHING | Soil Research

Bauxite-processing residue sand (BRS) is the primary growth medium used to rehabilitate Alcoa's residue storage areas (RSAs) in south-west Western Australia. This material is typically coarse-textured, highly saline, highly alkaline, extremely sodic, and deficient in plant nutrients.

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Alumina Limited

Bauxite Residue Storage Area Rehabilitation. Percent of total area rehabilitated. 2020 target 30% . Bauxite Residue Intensity. Metric tons per metric ton of alumina produced. The increase in bauxite residue intensity in 2016 was due to the curtailing of refineries that had lower residue-to-alumina ratios.


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Investigation of Hydrological Behaviour of In Situ Bauxite ...

Bauxite Residue for Closure and Rehabilitation Design N. Amoah Worsley Alumina Pty Ltd, Australia J. Phillips GHD Pty Ltd, Australia S. Vlahos Worsley Alumina Pty Ltd, Australia 1 INTRODUCTION Over 20 million m³ of residue from the alumina refining industry are produced in Western Australia each year.


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Sustained Bauxite Residue Rehabilitation with Gypsum and ...

Bauxite residue is a high volume byproduct of alumina manufacture which is commonly disposed of in purpose-built bauxite residue disposal areas (BRDAs). Natural waters interacting with bauxite residue are characteristically highly alkaline, and have elevated concentrations of Na, Al, and other trace metals.


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Alcoa -- Sustainability - Environmental Management

Mining rehabilitation and bauxite residue management are two key environmental priorities. Mining rehabilitation Alcoa of Australia (Alcoa) is a recognised world leader in mine site rehabilitation. Our key objective is to re-establish a self-sustaining jarrah forest ecosystem that fulfils forest land uses that include conservation, timber ...


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Bauxite Residue Disposal Area Rehabilitation - ICSOBA

produces approximately 1.Mt of bauxite residue per annum, which is stored in a 37 Bauxite Residue Disposal area (BRDA) of 183 ha. Rehabilitation involves amendment witha carbonation process to neutralise the pH, following this, gypsum and residue sand is .


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Sustained Bauxite Residue Rehabilitation with Gypsum and ...

1 Sustained Bauxite Residue Rehabilitation with Gypsum and Organic 2 Matter 16 years after Initial Treatment 3 Andrew W. Bray a*, Douglas I. Stewart b, Ronan Courtney c, Simon P. Rout d, 4 Paul N. Humphreys d, William M. Mayes e, Ian T. Burke a 5 a School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK 6 b School of Civil Engineering, University of Leeds, Leeds LS2 9JT, UK


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Restoring jarrah forest in southwestern Australia after ...

Restoring jarrah forest in southwestern Australia after bauxite mining Andy Seiser . Introduction . Alcoa of Australia Limited is the world's largest bauxite miner and alumina refiner. This company has mined bauxite in the jarrah forest in western Australia since 1963, and the first restorations were carried out in 1966 (Koch and Ward 1994).


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Shifts in leaf N:P stoichiometry during rehabilitation in ...

Global production of bauxite residue during extraction of alumina from bauxite ore approximates 120 million tons every year 1.Rehabilitation of bauxite residue sand (BRS) disposal areas is difficult and costly due to its inherent hostile characteristics–strong sodicity (ESP > 70%), high salinity (>30 dSm −1) and alkalinity (pH > 10) and nutrient scarcity and imbalance 2,3.


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