In order to assess the risk potential of (contaminant) mass transport in soil, knowledge about various mass transport mechanisms within the vadose zone is essential. Diffusion, dispersion, convection and retardation are the main processes. Application of so called “DKS-Permeameter” (diffusion-convection-sorption), which are not yet state of art, allows lab-scale determination of parameters of these processes simultaneously for soil samples. Based on theoretical information about soil mass transport mechanisms and an overview on approved experiments, a series of parallel experiments with DKS-Permeameter is carried out. Focus of this Master`s thesis is an analysis of various problems of DKS-Permeameter applications concerning the present topic. Moreover the development of improvement potentials for the use of the test cells is investigated. Subsequently, the investigation of a chromium-contaminated soil of a former leather tannery, which has been designated as a contaminated site, is carried out. The aim of experiments is the presentation of emission curves for chromate as a function of diffusion. Finally, an attempt to reduce hexavalent chromium is conducted and the results achieved will be applied on the accomplishment of securing and remediation measures at the mentioned contaminated site.