Estimating pollutant concentration in soil seepage water - mobilization of inorganic pollutants by carbondioxide
As part of the Federal Programme on the assessment of seepage water pollutant concentration in contaminated soil and waste like municipal incineration slag and building rubble we investigate the influence of CO2 on pollutant concentration. The partial pressure of CO2 in the pore space of soil or deposited material is always higher than in the atmosphere. Column tests under non saturated conditions are conducted to obtain seepage water under controled pore gas composition regarding O2,N2,CO2. Different partial pressures of CO2 will be applied between atmospheric and complete saturation. This setup is considered to deliver concentrations similar to those under field conditions and will therefore serve as a reference system. We will also conduct column tests under water saturated conditions and batch extraction tests in order to see if and t what extent the effects observed in the simpler approaches can be related to the reference system. The aim is to develop an elution (column test) or extraction procedure (batch test) including CO2 as a mobilizing agent. The test should be a reliable tool for the assessment of pollutant release from the abovementioned materials. Weitere Informationen zu diesem Forschungsprojekt können Sie hier bekommenPublikationen
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