MSWI BA treated with Advanced Dry Recovery: a field scale study on materials’ leaching properties

Sormunen, Laura Annika; Kaartinen, Tommi; Rantsi, Riina

doi:10.1080/19397038.2018.1444679

Cited by 4 publications

(4 citation statements)

References 24 publications

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“…The difference in the results between the laboratory leaching tests and the results from the lysimeter tests was expected, and they were in line with the literature reports [12,13]. In laboratory, under such water-saturated conditions, the chemical equilibria were achieved during leaching due to a surface dissolution and diffusion of the PHSs [44]. In the lysimetric tests, rainwater was the leaching solution, which was infiltrated and gradually percolated through the geotechnical composites under sub-saturated conditions [13,44].…”

Section: Results From the Field Lysimetric Experimentssupporting

confidence: 87%

“…In laboratory, under such water-saturated conditions, the chemical equilibria were achieved during leaching due to a surface dissolution and diffusion of the PHSs [44]. In the lysimetric tests, rainwater was the leaching solution, which was infiltrated and gradually percolated through the geotechnical composites under sub-saturated conditions [13,44]. The cumulative L/S ratio in the lysimeters was more than 10-times lower than for the laboratory test, only from 0.6 to 1.1 for the uncompacted composites, and 0.4 to 0.9 for the compacted composites.…”

Section: Results From the Field Lysimetric Experimentsmentioning

confidence: 99%

“…Higher values of the cumulative mass releases of As, Cr, and Mo were determined for composites 2 and 3, even though the total content of these elements was much lower in comparison to composite 1. This might be related to the lower immobilization of these oxyanion metals due to alkaline pore solutions in both composites or due to complexation with soluble organic matter in composite 2 [44,47]. The immobilization of Cu, Ni, and Zn appeared to be the highest in composite 3 due to the formation of low-solubility hydroxides and incorporation in the newly formed mineral phases [48], followed by composite 1, while the least effective was in composite 2, in which the leaching of these metals was increased due to the complexation with dissolved organic matter that has increased mobility under alkaline conditions in this composite [42,48,49].…”

Section: Results From the Field Lysimetric Experimentsmentioning

confidence: 99%

“…Accordingly, the pH of the leachate from the uncompacted composite 2 was lower (pH 10.8) than in the compacted sample (pH 11.6) (Table S12). Due to the smaller amount of dissolved organic matter, the extent of the Cu and Ni complexation and thus the Cu and Ni release from the uncompacted composite 2 was smaller than from the compacted sample (Table S12) [44]. The release of Mo from composite 2 was related to the negative charge of the molybdate oxyanion (MoO 4 2− ), which was not effectively immobilised by the constituents of composite 2 at the highly alkaline pH.…”

Section: Leaching Of Potentially Hazardous Substances From the Raw Ma...mentioning

confidence: 99%

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Environmental Acceptability of Geotechnical Composites from Recycled Materials: Comparative Study of Laboratory and Field Investigations

Đurić

Serjun

Mladenovič

et al. 2023

IJERPH

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The environmental properties of three geotechnical composites made by recycling wastes were investigated on a laboratory scale and in the field with the use of lysimeters designated for the revitalization of degraded mining sites. Composites were prepared by combining the mine waste with paper-mill sludge and foundry sand (Composite 1), with digestate from municipal waste and paper ash (Composite 2), and with coal ash, foundry slag and waste incineration bottom ash (Composite 3). The results of laboratory leaching tests proved that Composites 1 and 3 are environmentally acceptable, according to the legislative limits, as the potentially hazardous substances were immobilized, while in Composite 2, the legislative limits were exceeded. In the field lysimeters, the lowest rate of leaching was determined for optimally compacted Composites 1 and 3, while for Composite 2 the leaching of Cu was high. This study proved that optimally installed Composites 1 and 3 are environmentally acceptable for use in construction as an alternative to virgin materials, for the revitalization of degraded mining sites or, along with Composite 2, for closure operations with landfills. In this way, locally available waste streams are valorised and channelized into a beneficial and sustainable recycling practice.

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Section: Results From the Field Lysimetric Experimentssupporting

confidence: 87%

Section: Results From the Field Lysimetric Experimentsmentioning

confidence: 99%

Section: Results From the Field Lysimetric Experimentsmentioning

confidence: 99%

Section: Leaching Of Potentially Hazardous Substances From the Raw Ma...mentioning

confidence: 99%

See 2 more Smart Citations

Environmental Acceptability of Geotechnical Composites from Recycled Materials: Comparative Study of Laboratory and Field Investigations

Đurić

Serjun

Mladenovič

et al. 2023

IJERPH

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Optimizing Shear Strength Performance of Incinerator Bottom Ash Composites Using Neural Networks

Kumar,

Singh

2024

KSCE J Civ Eng

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Potential Use of Incineration Bottom Ash in Construction: Evaluation of the Environmental Impact

Kalbe

Simon

2020

Waste Biomass Valor

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Knowledge of the long-term leaching behavior of potentially harmful substances is crucial for the assessment of the environmental compatibility of reusing municipal solid-waste incineration bottom ash (MSWI BA) in construction, i.e., as a road base layer. BA fractions obtained from wet-processing aiming at the improvement of environmental quality were used to investigate the mobility of relevant substances. Eluates from laboratory-scaled leaching procedures (column percolation and lysimeters) were analyzed to learn about the long-term release of substances. Unsaturated conditions and artificial rainwater (AR) were used in the lysimeter tests to simulate field conditions. In addition, batch test eluates were generated at usual liquid-to-solid ratios (L/S) for compliance testing purposes. A variety of cations and anions was measured in the eluates. The wet treatment reduces the leaching of chloride and particularly sulfate by more than 60%. The release of typical contaminants for the treated MSWI BA such as the heavy metals Cu and Cr was well below 1% in the conducted leaching tests. An increase in the Sb concentration observed in the lysimeter experiments starting at L/S 0.75 L/kg and in the column experiment at L/S 4 L/kg is assumed to be related to decreasing concentrations of Ca and thus to the dissolution of sparingly soluble calcium antimonate. The same leaching mechanism applies with V, but the concentration levels observed are less critical regarding relevant limit values. However, on the long term the behavior of Sb could be problematic for the application of MSWI BA in construction. Graphic Abstract

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MSWI BA treated with Advanced Dry Recovery: a field scale study on materials’ leaching properties

Cited by 4 publications

References 24 publications

Environmental Acceptability of Geotechnical Composites from Recycled Materials: Comparative Study of Laboratory and Field Investigations

Environmental Acceptability of Geotechnical Composites from Recycled Materials: Comparative Study of Laboratory and Field Investigations

Optimizing Shear Strength Performance of Incinerator Bottom Ash Composites Using Neural Networks

Potential Use of Incineration Bottom Ash in Construction: Evaluation of the Environmental Impact

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