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Leaching experiments on the release of heavy metals and PAH from C&D waste and MSWI bottom ash
(2010)
Leaching tests are fundamental tools for the assessment of long-term impact of
contaminated waste materials on the soil-groundwater pathway. Waste materials should be
tested under conditions equal to their actual application in re-use scenarios to achieve reliable
results. Since the standards for leaching procedures available on international level so far are
either not validated or considered inadequate in respect to coarse grained materials, new
standards had to be developed. Therefore column percolation and batch test procedures have
been standardized and validated to enable their introduction to new German regulations
concerning waste management. Practical aspects of the test procedures as well as the
boundary conditions compared to the already existing standards will be described. Examples
including round robin test results will be given to justify the selection of the new
specifications.