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

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Abstract

Leaching of fine fraction (<10 mm) obtained from landfill mining activities in an Estonian landfill was done. On-site excavation was carried out in four test pits (TP1, TP2, TP3, TP4) that were further divided in four layers (L 1, L 2, L 3, L 4). Total chemical oxygen demand (CODt), dissolved chemical oxygen demand (CODd), total organic carbon (TOC), dissolved organic carbon (DOC) and metals (Zn, Cu, Pb and Cd) were analyzed. The results showed that approximately 70 % of CODt were in particulate/colloidal state. The TOC released ranged between 2326 and 3530-mg/kg dry matter for test pits suggesting spatial differences in the studied landfill. DOC ranged between 365–874 and 317–940 mg/kg for different test pits and sampling layers, respectively. Low average leaching rates of metals were observed (0.2–1.5 %). Pb had a significantly higher average leaching rate (1.0 %) compared to Zn (0.70 %) and Cu (0.35 %). The potential use of CODt as a surrogate indicator of TOC, DOC and Zn on the basis of high correlation coefficients was observed. To conclude, the implementation of adequate strategies to manage fine-grained fractions obtained from excavated waste relies on physico-chemical characterization of both the fine fractions itself and the leachate generated during storage and use.

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Acknowledgments

The authors would like to acknowledge the financial support from the Swedish Institute-SI and the Environmental Investment Centre in Estonia. We are grateful for the help obtained during the excavation and field work from the MSc and PhD students of Kaunas University of Technology (Department of Environmental Technology), Estonian University of Life Sciences (Institute of Agricultural and Environmental Sciences and the Department of Water Management), University of Latvia (Faculty of Chemistry), Taras Shevchenko National University of Kyiv and Linnaeus University (Environmental Science and Engineering Group). The fieldwork would not be done without crucial help of Olavi and Rein-Erik from RTS-Infra Ltd. Many thanks go to the support given by Valdo Liv and Mihkel Paljak.

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Authors and Affiliations

  1. Department of Biology and Environmental Sciences, Faculty of Health and Life Sciences, School of Natural Sciences, Linnaeus University, LNU, Landgången 3, SE-391 82, Kalmar, Sweden

    Fabio Kaczala & William Hogland

  2. Environmental Health Research Center, Faculty of Health, Golestan University of Medical Sciences, Gorgan, Iran

    Mohammad Hadi Mehdinejad

  3. Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences, Tartu, Estonia

    Allar Lääne & Kaja Orupõld

  4. Department of Environmental Sciences, University of Eastern Finland, Kuopio, Finland

    Amit Bhatnagar

  5. Department of Water Management, Estonian University of Life Sciences, Institute of Forestry and Rural Engineering, Tartu, Estonia

    Mait Kriipsalu

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  1. Fabio Kaczala
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  2. Mohammad Hadi Mehdinejad
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  3. Allar Lääne
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  6. Mait Kriipsalu
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  7. William Hogland
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Correspondence to Fabio Kaczala.

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Kaczala, F., Mehdinejad, M.H., Lääne, A. et al. Leaching characteristics of the fine fraction from an excavated landfill: physico-chemical characterization. J Mater Cycles Waste Manag 19, 294–304 (2017). https://doi.org/10.1007/s10163-015-0418-3

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  • DOI: https://doi.org/10.1007/s10163-015-0418-3

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