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In this work the leaching from and mobility of contaminants in combustion residues was studied. Attention was given to the source term for release to the environment and to phenomena at waste/soil interfaces. Radiotracer diffusion methods and leaching tests developed in the Netherlands were used. The diffusion measurement procedure was modified and applied to the measurement of trace element diffusivities in coal fly ash, coal fly ash products, clay soil, peat and sandy soil. In all matrices, Na or H(3) was measured as a reference to identify effects of porosity, pore structure and degree of saturation with water. The influence of speciation, cementation, contaminant concentration and degree of saturation on the effective diffusion coefficients of some selected trace contaminants was measured in combustion residues and in soil. An overview of current testing methods for waste materials, waste products and waste/soil interaction is included and the relevance for judgement of waste applications is discussed. A flow scheme for the judgement of waste materials on the basis of leaching data is considered.

Additional information

Authors: VAN DER SLOOT H A, ECN, Petten (NL);DE GROOT G J, ECN, Petten (NL);HOEDE D, ECN, Petten (NL);WIJKSTRA J, ECN, Petten (NL)
Bibliographic Reference: EUR 14403 EN (1993) 198 pp., MF, ECU 8
Availability: (2)
Record Number: 199310539 / Last updated on: 1994-11-29
Original language: en
Available languages: en