Use Of Waste Gypsum In The Revegetation On Red Mud Deposits: A Greenhouse Study

Wong, Jane C. Y.

doi:10.1006/wmre.1993.1024

Cited by 32 publications

(65 citation statements)

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“…This increase in calcium and magnesium levels together with a decrease in sodium levels resulted in ESP values lower than the value of 10% cited by Bernstein (1974) as critical for fine textured soils. Wong and Ho (1993) achieved a reduction in ESP from 70% in un-amended mud to around 11% following addition of gypsum and a period of leaching.…”

Section: Chemical Properties Of the Substratementioning

confidence: 95%

“…Whilst many workers have achieved plant growth in bauxite residue in pot trials, there is limited knowledge of long-term growth of vegetation in red mud at field level. Wong and Ho (1993) concluded that more than one growing season would be needed to evaluate the long term effect of gypsum and sewage sludge in improving the properties of red mud for plant growth.…”

Section: Introductionmentioning

confidence: 97%

“…Establishing vegetation on fine fraction bauxite processing residue 'red mud' is limited by the high pH and sodium content exhibited by the mud (Wong and Ho, 1993). Various authors have recorded high exchangeable sodium percentages (ESPs) for red mud, such as 70 (Wong and Ho, 1994) and 81% (Meecham and Bell, 1977).…”

Section: Introductionmentioning

confidence: 99%

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Nutrient status of vegetation grown in alkaline bauxite processing residue amended with gypsum and thermally dried sewage sludge - A two year field study

Courtney

Timpson

2005

Plant Soil

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Although the treatments for overcoming the high pH and exchangeable sodium percentage (ESP) of bauxite residue are well known, there is little information on long-term nutrient management of vegetation after rehabilitation. The present study examined the chemical and physical amendment of fine fraction residue (red mud) at the Aughinish Alumina Ltd. Bayer Plant, Ireland followed by a two-year field investigation. Gypsum and sewage sludge were incorporated into the residue and amended mud sown with Lolium perenne and Holcus lanatus. Aerial portions were harvested and nutrient composition determined annually for the first two years growth. Amended substrate was low in manganese and magnesium. After year one herbage contained adequate calcium levels, but there were deficiencies for nitrogen, manganese, potassium and magnesium. Sodium levels were not considered excessive and levels declined further in year two. Levels for nitrogen, calcium, manganese, magnesium, phosphorous and potassium were also reduced in the second year. As levels were already deficient in year one the further decreases suggest severe nutrient shortage in the residue substrate. For long-term success of revegetation of bauxite residue, even after gypsum and organic amendment, the deficiencies of nutrients in the substrate must be overcome.

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Section: Chemical Properties Of the Substratementioning

confidence: 95%

Section: Introductionmentioning

confidence: 97%

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Nutrient status of vegetation grown in alkaline bauxite processing residue amended with gypsum and thermally dried sewage sludge - A two year field study

Courtney

Timpson

2005

Plant Soil

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“…Some research has already been undertaken in this respect, for example, J.W.C. Wong & Ho (1993) found that the addition of gypsum residue to serve as an ameliorating agent, can reduce the levels of pH, EC, Na, and at the same time, increase the availability of Ca in the red mud. In another study, Lubis (2015), reported that the application of bed coal ash and humic substances can increase available-P, Ca exch, Mg exch and CEC of red mud.…”

Section: Introductionmentioning

confidence: 99%

The Utilization of Red Mud as a Plant Growing Medium with The Addition of Ultisol Soil Material and Compost

Aini

Iskandar

Darmawan

2017

Sains Tanah J. Soil Sci. Agroclimatology

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The utilization of red mud, which is a residue from the extraction of aluminum from mined bauxite ore, as a plant growing medium, needs to be studied further. There are some chemical aspects that may hinder the growth of, or even cause mortality in, plants such as very high pH, electrical conductivity (EC) and exchangeable Na (Na exch ), and very low nutrient elements content. The objective of this study was to investigate the effects of adding Ultisol soil material, mixed with compost, both soil ameliorating agents, to red mud for use as a growing medium for Sengon (Paraserianthes falcataria) seedlings. This study was conducted in two stages, namely: washing of the red mud, and trial planting in the greenhouse using different combinations of the soil ameliorants. Washing of the red mud with tap water was intended to reduce the levels of Na, EC, and pH. Trial planting in the greenhouse was carried out in 2-factorial Completely Randomized Design (CRD). , respectively. The treatment of using a mixture of 750 g red mud + 750 g sm-Ultisol, and adding compost at 117.18 g/polybag gave the best result in improving the chemical property of the red mud growing medium, and producing the best plant growth among all treatment combinations.

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“…Even with added gypsum, the leaching of Na + out of the surface horizons can be slow and it can take months or even years before the medium is suitable for plant establishment and growth (Wong and Ho, 1993; Gherardi and Rengel, 2003). Following leaching, the ESP is typically reduced from 60-90% down to about 2-10% while pH is reduced from 10-12 down 8.…”

Section: Field Neutralizationmentioning

confidence: 99%

Revegetation strategies for seawater neutralized bauxite residue at Rio Tinto Alcan using various amendments

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Use Of Waste Gypsum In The Revegetation On Red Mud Deposits: A Greenhouse Study

Cited by 32 publications

References 0 publications

Nutrient status of vegetation grown in alkaline bauxite processing residue amended with gypsum and thermally dried sewage sludge - A two year field study

Nutrient status of vegetation grown in alkaline bauxite processing residue amended with gypsum and thermally dried sewage sludge - A two year field study

The Utilization of Red Mud as a Plant Growing Medium with The Addition of Ultisol Soil Material and Compost

Revegetation strategies for seawater neutralized bauxite residue at Rio Tinto Alcan using various amendments

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