Project long title

Further investigations concerning in-situ remediation

Project description

The project ChromSan which is funded by the Austrian Ministry of the Environment via the Kommunalkredit Public Consulting (KPC) improves a technology futher which was developed within a antecedent project for the reduction of toxic Cr(VI) to harmless Cr(III) and expands ist field of application to the saturated soil zone. The „ferroDECONT“ process is based on the reaction

Fe⁰ + Cr^VIO₄^2- + 4 H₂O ↔ Fe(OH)₃ + Cr^III(OH)₃ + 2 OH^-.

At an old industrial site a pilot plant was installed (Figure pilot plant), where a pump & treat process is applied to treat the contaminated ground water by a fluidized bed of granulated pig iron. The precipitated Cr(III) hydroxide is separated and the cleaned groundwater is re-injected adding a reduction agent (“in-situ remediation”) to avoid subsequent re-oxidation.

 
Pilot plant at an old industrial site

Project results

The in-situ remediation by reduction processes is limited by the rebound effect, but the pump-treat ferroDECONT process is sustainable.

Sedlazeck, K.P.; Höllen, D.; Müller, P.; Mischitz, R. (2015): Innovative technique for waste water treatment and contaminated site remediation. Journal of Solid Waste Technology & Management 41(44), p. 937-944.

Sedlazeck, K. P.; Höllen, D.; Müller, P.; Mischitz, R.; Gieré, R. (2017): Mineralogical and geochemical characterization of a chromium contamination in an aquifer – A combined analytical and modelling approach – in: Applied Geochemistry. 87, p. 44-56.

Funding

Federal Ministry of Agriculture, Forestry, Environment and Water Management

Project partner

ferroDECONT GmbH

You can send a message directly to the leader of the working group Mister Dr. Philipp Sedlazeck by using the following form.