Remediation of sites contaminated with organic pollutants

Goals:

Development of an innovative combined method for remediating BTEX contamination using in-situ chemical oxidation (ISCO) and enhanced natural degradation (ENA)

• The aromatic hydrocarbons present in the aquifer are mobilised by a surfactant flush and simultaneously chemically converted by in-situ chemical oxidation using persulphate.
• Residual BTEX contamination is transported with the sulphate produced from persulphate into the anoxic downstream flow (sulphate reduction). Here, the pollutants are degraded by indigenous sulphate-reducing bacteria, with the sulphate serving as a substrate for the sulphate-reducing bacteria.

Specifically:

Conducting preliminary laboratory tests (batch and column tests) to determine key parameters, such as the input concentrations of surfactants and persulfate, for the subsequent field tests.

Leaders:

ASR Sachverständigengesellschaft mbH, Mannheim

Cooperation Partners:

Technologiezentrum Wasser, Karlsruhe

Heidelberg University – Biogeochemistry Group (Prof. Frank Keppler, Dipl. Geol. Christian Scholz)

Funding:

Federal Ministry for Economic Affairs and Energy

Funded Research and Development-Cooperation Project