Reclamation of solid waste landfills by capping with dredged material

Mohan, Ram K.; Herbich, John B.; Hossner, L. R.; Williams, Fred S.

doi:10.1016/s0304-3894(96)01831-6

Cited by 22 publications

(6 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wehr et al (2006) demonstrated that revegetation of bauxite residue using a soil cap was beneficial; the analyses of plant root propagation showed that the residues were hostile to root growth but the plants would take up most nutrients from the soil cap. Mohan et al (1997) demonstrated that clayey dredged material obtained from maintenance dredging at a bay in Texas was beneficial for salt-tolerant plant growth. Surface water infiltration and chemical migration may be restricted by capping the dredged material.…”

Section: Mulching With Soil Materialsmentioning

confidence: 99%

A review of the characterization and revegetation of bauxite residues (Red mud)

Xue

Kong

et al. 2015

Environ Sci Pollut Res

342

View full text Add to dashboard Cite

Bauxite residue (Red mud) is produced in alumina plants by the Bayer process in which Al-containing minerals are dissolved in hot NaOH. The global residue inventory reached an estimated 3.5 billion tons in 2014, increasing by approximately 120 million tons per annum. The appropriate management of bauxite residue is becoming a global environmental concern following increased awareness of the need for environmental protection. Establishment of a vegetation cover is the most promising way forward for the management of bauxite residue, although its physical and chemical properties can limit plant growth due to high alkalinity and salinity, low hydraulic conductivity, trace element toxicity (Al and Fe), and deficiencies in organic matter and nutrition concentrations. This paper discusses the various revegetation and rehabilitation strategies. Studies of the rehabilitation of bauxite residues have mainly focused on two approaches, amelioration of the surface layer and screening of tolerant plants and soil microorganisms. Amendment with gypsum can reduce the high alkalinity and salinity, promote soil aggregation, and increase the hydraulic conductivity of bauxite residues. Organic matter can provide a source of plant nutrients, form stable complexes with metal cations, promote hydraulic conductivity, stabilize soil structure, and provide an energy source for soil organisms. Tolerant plants and microorganisms such as halophytes and alkaliphilic microbes show the greatest potential to ameliorate bauxite residues. However, during restoration or as a result of natural vegetation establishment, soil formation becomes a critical issue and an improved understanding of the various pedogenic processes are required, and future direction should focus on this area.

show abstract

Section: Mulching With Soil Materialsmentioning

confidence: 99%

A review of the characterization and revegetation of bauxite residues (Red mud)

Xue

Kong

et al. 2015

Environ Sci Pollut Res

342

View full text Add to dashboard Cite

show abstract

“…Other alternative materials, such as compacted sewage sludge [39], lime-stabilised sludge [40], dredged sediments [41], 2 D. Rubinos et al…”

Section: Introductionmentioning

confidence: 99%

Assessment of bauxite refining residue (red mud) as a liner for waste disposal facilities

Rubinos

Spagnoli²,

Barral

2013

International Journal of Mining, Reclamation and Environment

View full text Add to dashboard Cite

Red mud (RM), a waste arising from the bauxite refining, was studied to assess its suitability as a compacted liner material. The geotechnical and hydraulic conductivity (K) characteristics of the RM, as well as the effect of desiccation, were evaluated. RM has index properties satisfying the requirements to achieve low K. The compaction-permeability studies showed that RM may be compacted to a dense homogeneous mass using a moderate compactive effort, while lowest K (61 Â 10 À7 cm/s) was achieved for RM compacted slightly (0.4-4%) wet of optimum. Shear strength test revealed high values of friction angle and cohesion for compacted RM, and its tight structure was also evidenced by its low compressibility and maximum settlement under load. Desiccation adversely affected the permeability of compacted RM, but to a lesser extent than generally observed for clays. These results suggest that RM could be potentially utilised as a low-permeability barrier to be laid down under engineered landfill sites.

show abstract

“…The liner materials mainly used are, for example, clay (Rowe et al 1995, Wagner andSchnatmeyer 2002) or geosynthetic clay (Wagner and Schnatmeyer 2002). To conserve natural clay resources, use of various possible alternative materials has been proposed, such as compacted compost (Benson and Othman 1993), coal fly and bottom ash (Nhan et al 1996, Palmer et al 2000, Kumar and Stewart 2003, water treatment sludge (Wang and Tseng 1993), blast furnace dust (Wagner and Schnatmeyer 2002), dredged material (Mohan et al 1997), and bentonite-coated gravel (Roberts and Shimaoka 2008). However, the potential utilization of residues from the steel industry as lining material has been largely neglected, although the hydraulic conductivity of steel slag mixtures may be as low as 10 À11 m s À1 (Herrmann 2006) which is in the range of geosynthetic clay liners having a hydraulic conductivity of <5 Â 10 À11 m s À1 (Wagner and Schnatmeyer 2002).…”

Section: Introductionmentioning

confidence: 99%

Steel slag used in landfill cover liners: laboratory and field tests

et al. 2010

View full text Add to dashboard Cite

Stricter rules for landfilling within the EU have led to the closure of many landfills and a need for large amounts of cover liner materials. Therefore, the potential utilization of mixtures of electric arc furnace slag (EAFS) and ladle slag (LS), which are currently deposited in landfills, as a material for use as landfill liner was investigated. Laboratory analyses showed the mixtures to have similar compression strength to that of high-strength concrete and low hydraulic conductivity (< 10(-11) m s(-1) in some cases). However, both their hydraulic conductivity and compaction properties were strongly affected by the time between adding water to the mixtures and compacting them (tests showed that a delay of 24 h can lead to an increase in hydraulic conductivity, so it should be compacted as soon as possible after mixing the material with water). In addition, the performance of a cover liner constructed using EAFS and LS was studied in a 2-year field trial on a landfill for municipal solid waste, in which the average amount of leachate collected from ten lysimeters was only 27 L m(-2) year(-1), easily meeting Swedish criteria for the permeability of covers on non-hazardous waste landfills (≤ 50 L m(-2) year(-1)). Thus, the material seems to have promising potential for use in barrier constructions.

show abstract

Reclamation of solid waste landfills by capping with dredged material

Cited by 22 publications

References 3 publications

A review of the characterization and revegetation of bauxite residues (Red mud)

A review of the characterization and revegetation of bauxite residues (Red mud)

Assessment of bauxite refining residue (red mud) as a liner for waste disposal facilities

Steel slag used in landfill cover liners: laboratory and field tests

Contact Info

Product

Resources

About