Hazardous and radioactive waste encapsulation treatment

GEOPOLYTECH: Toxic and Radioactive Waste Management

The patented GEOPOLYTECH technology is based on the use of geopolymer binders. The GEOPOLYTECH technology could provide a safe and proven method for the encapsulation and long-term containment of toxic, hazardous, and radioactive sludges from decantation ponds and pasty wastes (filter cakes) from water treatment facilities. The technology is presently applied in Germany by B.P.S. Engineering .

The patented GEOPOLYTECH technology provides excellent retention for highly toxic elements, including:

  • heavy metals
  • uranium
  • radium
  • arsenic
  • hydro-carbons

Like vitrification, the GEOPOLYTECH technology offers:

  • high strength
  • acid resistance
  • long term durability
  • geological analogues
  • archaeological analogues

But unlike vitrification, the GEOPOLYTECH technology does not require energy-consuming drying and melting.

GEOPOLYTECH can be produced with inexpensive Geopolymer binders or cements. GEOPOLYTECH requires only simple mixing equipment. GEOPOLYTECH is produced at room temperature.

Scientific background

In the recently updated book Geopolymer Chemistry & Applications, Toxic and Radioactive Waste Management applications are thoroughly outlined in Chapter 26. You may also go to the Geopolymer Library and download several papers.

Laboratory and pilot-scale studies

The European research project GEOCISTEM successfully tested this technology in various research projects performed for the German company WISMUT GmbH. The testing was conducted to rehabilitate uranium mining sites in former East Germany, where the contaminants included uranium, radium, hydro-carbons, and arsenic.