Construction and demolition waste: Comparison of standard up-flow column and down-flow lysimeter leaching tests

Stefania Butera, Jiri Hyks, Thomas Højlund Christensen, Thomas Fruergaard Astrup

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Five samples of construction and demolition waste (C&DW) were investigated in order to quantify leaching of inorganic elements under percolation conditions according to two different experimental setups: standardised up-flow saturated columns (-1TS) for Al, As, Ba, Cd, Cu, DOC, Mg, Mn, Ni, P, Pb, Sb, Se, Si, Zn. Observed differences between tests are likely to be due to differences in pH related to crushing and exposure of fresh particle surfaces, as well as in equilibrium conditions. In the case of C&DW, the standardised column tests, which are more practical, are considered to acceptably describe cumulative releases at L/S 10l·kg-1TS in percolation scenarios. However, when the focus is on estimation of initial concentrations for (for example) risk assessment, data from standardised column tests may not be fully applicable, and data from lysimeters may be used for validation purposes. Se, Cr and, to a lesser extent, SO4 and Sb were leaching from C&DW in critical amounts compared with existing limit values.
    Original languageEnglish
    JournalWaste Management
    Volume43
    Pages (from-to)386-397
    ISSN0956-053X
    DOIs
    Publication statusPublished - 2015

    Keywords

    • C&DW
    • Geochemical modelling
    • Lysimeter
    • Particle size
    • PH static
    • Standard-column
    • Leaching
    • Lead
    • Lysimeters
    • Manganese
    • Risk assessment
    • Risk perception
    • Soil surveys
    • Solvents
    • Zinc
    • Construction and demolition waste
    • Equilibrium conditions
    • Field conditions
    • Initial concentration
    • Inorganic elements
    • Liquid to solid ratio
    • Particle surface
    • Demolition

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