Solidification/stabilization
Techniques for rehabilitating polluted sites and soils - Summary sheets

Another keyword: inertage

Solidification involves mixing a binder and water with the polluted soil to create a hard, low-permeability material that is stable over time, trapping the pollutant.

Stabilization consists in reducing the mobility of a pollutant in the soil (figure 27). With these two techniques, the pollutants are not destroyed, but the risks to the environment are reduced. These techniques are often used on non-biodegradable pollutants (certain organic pollutants or heavy metals).

Solidification and stabilization often require post-treatment containment, but are still widely used, especially for metals.

• Principle

  Solidification methods are inerting techniques: solidification involves acting on the contaminated matrix as a whole. The physical characteristics...