Remediation of Tetrachloroethylene (PER) in hard rock aquifersCopyright: Boester
Project members: Uwe Boester, Thomas R. Rüde
Tetrachloroetehene (PER) is a VOC that is used as solvent for cleaning all kinds of surfaces and textiles. Because of, accidents on industrial sites and laundries using PER as well as through inappropriate use of it, many of those industrial sites are contaminated with the VOC and need remediation. As a consequence the groundwater is contaminated by the emission of PER into the environment. At many sites Pum&Treat (P&T) is the remediation method applied. Very often the efficiency of Pump&Treat remediations need long time and maybe will not be able to complete the remediation at all. The example from Bad Kreuznach in Rhineland-Palatinate shows a similar development.
To know if a remediation of contaminated hard rock aquifers could generally be successful in an acceptable time and cost frame, using P&T, we investigate the mobility of PER in the Kreuznach-Sandstone. The experiments of the project are executed on bore hole samples form the contaminated site.
The permeability of the samples for water in a PER saturated stone sample and vice versa is determined using a flow cell on the core samples. Additionally, contact angle measurements, saturation experiments, NMR measurements and thermogravimetric analysis (TGA) are conducted an all methods together define the mobility of PER in the hard rock aquifer od the Kreuznach-Formation.