Community Research and Development Information Service - CORDIS

Abstract

This report describes the results of a prenormative study of leaching tests for stabilised wastes. After a preliminary study of homogeneity and reproducibility of testing within one laboratory, an intercomparison of leaching tests for monolithic stabilised wastes was carried out using a tank leaching test procedure as the common method. Other test methods were applied to put the test results in perspective, using a pH static leaching procedure. It was shown that the equilibrium pH reached in these tests largely dictates the leached quantity. Based on these observations, the Unified Approach for Leaching as developed for granular materials can be extended to monolithic materials by combining dynamic aspects of leaching from the tank leach test with solubility control of leaching from a pH static leach test. However, changes in the predominant leaching mechanism with ageing of the cement-based matrix need to be taken into account when evaluating test results. It was concluded that the tank leach test is a good characterisation tool to assess the release from stabilised wastes for regulatory purposes.

Additional information

Authors: VAN DER SLOOT H A, ECN Petten (NL);HOEDE D, ECN Petten (NL);DE GROOT G J, ECN Petten (NL);VAN DER WEGEN G J L, INTRON BV, Sittard (NL);QUEVAUVILLER P, European Commission, Bruxelles (BE)
Bibliographic Reference: EUR 16133 EN (1995) 103 pp., MF, ECU 8
Availability: (2)
Record Number: 199510345 / Last updated on: 1995-03-21
Category: PUBLICATION
Original language: en
Available languages: en