Leaching characteristics of the fine fraction from an excavated landfill: physico-chemical characterization

Kaczala, Fábio; Mehdinejad, Mohammad Hadi; Lääne, Allar; Orupõld, Kaja; Bhatnagar, Amit; Kriipsalu, Mait; Hogland, William

doi:10.1007/s10163-015-0418-3

Cited by 32 publications

(26 citation statements)

References 15 publications

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“…Leaching tests done by Kaczala et al, 2017 on landfill-mined material (particle size < 10 mm) for heavy metals such as Zn (0.5-0.9%), Cu (0.2-0.6%) and Pb (0.9-1.1%) have shown low average leaching ratios (leached amount/amount in solid waste matrix). Low leaching ratios for Cu (0.2%), Zn (6.1%) and Pb (0.7%) from under-sieve (< 20 mm) residues, prior to landfilling, were obtained by Cossu & Lai, 2012 as well.…”

Section: Metals Contentmentioning

confidence: 99%

Characterization of Fine Fractions From Landfill Mining: A Review of Previous Investigations

2018

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Several landfill mining (LFM) studies have been carried out in recent years all around the world. From these studies qualitative and quantitative information regarding the composition and characteristics of the different fractions excavated from landfills has been obtained. This information comprises data from various landfill sites around the globe from which useful correlations for future LFM projects can be identified. Of particular interest to this paper is the information regarding the fine fractions, which represent to this day a crucial obstacle in the implementation of LFM and enhanced landfill mining (ELFM). The fine fractions make up a considerable portion of the total amount of waste disposed of in landfills. Depending on the particle size chosen as upper limit to define the fines fraction, the portion of this fraction can be as high as 40-80 wt.% of the total excavated waste. These fractions consist of decomposed organic substances, e.g. humic substances, partly weathered mineral waste, e.g. sand, brick fragments, concrete, but also of fine metal particles, especially non-ferrous metals, and still a significant amount of plastics, paper and other calorific fractions. However, although calorific fractions might be used for energy recovery and inorganic fractions for material (especially metal) recovery, current LFM studies are discarding the fine fraction due to lacking or too expensive processing routes. Therefore, it is of critical interest to LFM and ELFM projects to reduce the particle size down to which the excavated material can be processed. This paper, which was elaborated within the framework of the EU Training Network for Resource Recovery through Enhanced Landfill Mining -NEW-MINE, aims to review the obtained data from different LFM studies from municipal solid waste (MSW) landfills, concerning the fines fraction, in order to identify key aspects to be taken into consideration while designing the processing approach in future LFM and ELFM investigations.

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Section: Metals Contentmentioning

confidence: 99%

Characterization of Fine Fractions From Landfill Mining: A Review of Previous Investigations

2018

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“…Therefore, the observed low levels of the physico-chemical parameters could be explained in terms of the type of waste disposed, which was mainly glass and inert waste. The low DOC (and partly TDS) concentrations are due to the lack of putrescible wastes and their degradation products in the dump, since bio-decomposition of such wastes is related to increased DOC amounts [8,36]. As observed by Kaczala et al [8], the leachate generated and the concentration of carbon contents in particulate and dissolved forms is dependent on environmental and physical conditions such as oxygen diffusion, MC, void spaces and waste compactness.…”

Section: Leachate Characteristicsmentioning

confidence: 95%

“…The excavation was achieved using a 5 tonne excavator based on a method from Kaczala et al [8]. Excavated materials from every half-metre depth of each test pit (TP) were stockpiled separately for sampling.…”

Section: Excavation and Samplingmentioning

confidence: 99%

“…Based on previous investigations recommending site remediations [7], and given the high toxicities and persistence of heavy metals in landfill environments [8,9], the remediation practice has been excavation, transfer and landfilling of the polluted masses followed by covering of the sites with cleaner soils. However, the practice may involve transferring the pollution problem to other sites.…”

Section: Introductionmentioning

confidence: 99%

“…This implies designing an approach that prevents contamination from stored waste, while evaluating their most suitable fate for the benefit of both human health and environmental systems. Planning and implementation of such an approach requires a thorough understanding of characteristics of the contaminated materials [8,18]. As such, this study serves as one of the initial steps in the planning of safe intermediate storage of the excavated waste.…”

Section: Introductionmentioning

confidence: 99%

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Physico-chemical characteristics of fine fraction materials from an old crystal glass dumpsite in Sweden

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Jani

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Chemistry and Ecology

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Physico-chemical characteristics of waste, particularly fine fraction (FF), from an old crystal glass waste dump in Sweden were studied to assess recycling or disposal alternatives. Hand-sorting of the waste indicated glass content of 44.1% while sieving established the FF as a more soil-like mix of glass and other materials constituting 33.3% of all excavated waste. The FF was around neutral pH with 24.4% moisture content, low values of Total Dissolved Solids, Dissolved Organic Carbon and fluorides, but hazardous concentrations of As, Cd, Pb and Zn according to the Swedish Environmental Protection Agency guidelines. While the FF leached metals in low concentrations at neutral pH, it leached considerably during digestion with nitric acid, implying leaching risks at low pH. Thus, the waste requires safe storage in hazardous waste class 'bank account' storage cells to avoid environmental contamination as metal recovery and other recycling strategies for the glass waste are being developed. The study could fill the information gap regarding preservation of potential resources in the ongoing , fast-paced excavation and relandfilling of heavy metal contaminated materials in the region.

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Local residents’ perception of landfill impacts in Palestine: the case of Zahrat Al-Finjan landfill

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Al‐Khatib

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Leaching characteristics of the fine fraction from an excavated landfill: physico-chemical characterization

Cited by 32 publications

References 15 publications

Characterization of Fine Fractions From Landfill Mining: A Review of Previous Investigations

Characterization of Fine Fractions From Landfill Mining: A Review of Previous Investigations

Physico-chemical characteristics of fine fraction materials from an old crystal glass dumpsite in Sweden

Local residents’ perception of landfill impacts in Palestine: the case of Zahrat Al-Finjan landfill

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