Identification of degradation characteristics - exemplified by Gd-DTPA in a large experimental column

摘要

Surface water from rivers or lakes, infiltrating through porous media, is increasingly used as a source of public water supply. During bank fitration the water chemistry is substantially changed by various processes such as biodegradation, sorption and mixing with ambient groundwater, but the details of this natural attenuation are not yet entirely understood. In order to gain a better understanding, the degradation of an organic substance (DTPA) is examined here using various model approaches for steady state conditions. Models are fitted on data from an experimental study under near-field conditions. The results show advantages and disadvantages of the different model approaches and provide a guideline for the modelling of other organic substances under different but similar conditions.