Development of a Procedure for the Quantification of the Emission Rate of Contaminants from Loose Contaminated Material.

Project 2: Influence of Redox Potential, Dissolved Organic Carbon, and Temperature on the Mobilization of Anorganic Contaminants
(SIWAP)

In this project, the influence of different physical and geochemical parameters on the emission rate of contaminated material is investigated. We intend to establish a experimentally simple leaching procedure, which allows to predict the concentration of contaminants being transported to the groundwater, when contaminated material (slag from waste incineration, building rubble) is inserted into soils. Leaching tests have to be simple for application as a standardized procedure, but they rarely reflect the situation under field conditions. Varying important parameters like redox potential, DOC concentration, and temperature, we will systematically investigate their influence on the mobilization of contaminants from our test materials. For significant parameters correction factors will be determined for the transfer of the results from a simple standardized leaching experiment to realistic field conditions. In addition to that, the re-adsorption of contaminants eluting from the test materials onto major constituents of natural soils will be examined. These data will be incorporated in mass transfer models to predict the amount of contaminants being transportet to the groundwater under specific physical and geochemical conditions.

see as well: SIWAP II