Assessing the environmental impact of ashes used in a landfill cover construction

Travar, Igor; Lidelöw, Sofia; Andreas, Lale; Tham, Gustav; Lagerkvist, Anders

doi:10.1016/j.wasman.2008.09.009

Cited by 52 publications

(31 citation statements)

References 25 publications

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“…The concentrations in the cover leachate (Table 1) were compared to those found in bottom ash leachate in other studies [2,6,15]. It was clear that the leachate from the cover in this study had relatively high concentrations of Hg, Mg, N, TOC and Zn.…”

Section: Cover Leachate Compositionsupporting

confidence: 50%

“…The higher TOC and N concentrations are likely due to the FAR. Travar et al [2] studied BA mixed with digested sewage sludge and found even higher N and DOC concentrations. The differences in metal content can be due to differences in input to the incinerator, but contribution from the FAR cannot be ruled out.…”

Section: Cover Leachate Compositionmentioning

confidence: 98%

“…The construction of covers consumes large amounts of material. To save money and natural resources there is an interest in using alternative materials, such as suitable wastes or by-products, in the covers [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…There are also examples of BA being proposed in or above the sealing layer [2,9]. BA is produced whenever waste is incinerated and is available in large amounts [10].…”

Section: Introductionmentioning

confidence: 99%

“…Travar et al [2] studied the use of BA in landfill caps and found that the amount of water passing through the liner was insignificant compared to the water already present in the waste. In the long run, when the amounts of leachate from the cap becomes more significant, the easily leachable species are expected to be depleted, and secondary minerals formed after weathering of the ash will cause retention of pollutants inside the liner.…”

Section: Introductionmentioning

confidence: 99%

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Lab Scale Simulation of a Leak in a Landfill Cover

Modin

Palm²,

Praagh

et al. 2017

Eco-Tech

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Many Swedish landfills are currently applied with a final cover. To minimise costs and the use of natural resources, waste materials can be a suitable substitute in landfill covers. Depending on the wastes' contents, their mobility and in which layer of the final cover they are used, they could potentially contribute to the emission potential of the landfill. In this study the impact on landfill leachate quality from the drainage water of a final cover is investigated.Part of a landfill and its cover, below the upper drainage layer, was simulated in lab scale: The simulated liner was constructed from a mixture of fibre and ash residues from paper pulp production and the foundation and gas drainage layer was simulated by bottom ash from a municipal solid waste incinerator. The waste below the liner was simulated by residues from sorting of construction and demolition waste.The leachate from the simulated damaged landfill cover had elevated concentrations of many substances including metals, ions and organic matter. However, the simulated landfilled waste could sorb several of these. Ag, Cd, Cu, Hg, N, P, Pb and Sb were sorbed to such an extent that the effect from the cover leachate was unnoticeable. The only pollutants that passed through the waste unattenuated were As, K, Na, TOC, V and Zn. In a real landfill the sorption would be even better since the waste mass will be much larger compared to the cover. Despite elevated concentrations of potentially complex forming substances there was no evidence that the cover leachate enhanced the leaching of any contaminants from the waste. Altogether the results show that the use of the studied waste materials in landfill covers can only be expected to have a small effect on the concentration of contaminants in the leachate from the landfill.

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Section: Cover Leachate Compositionsupporting

confidence: 50%

Section: Cover Leachate Compositionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

“…There are also examples of BA being proposed in or above the sealing layer [2,9]. BA is produced whenever waste is incinerated and is available in large amounts [10].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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