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This technique aims to reduce the solubility, reactivity, or mobility of polluting elements by changing their chemical state or by physically immobilizing it using a stabilizing agent or by converting the pollutant waste into an easy to handle and safe solid material thereby avoiding the risks of volatilization, leaching, or leakage (solidifcation).

Generally, these methods do not destroy the pollutant substance; instead, they pre-vent these substances from contaminating the environment as a result of leaching processes, chemical reactions, etc.

Stabilization/Solidifcation

water from seeping into the waste depo-sits. The necessary technical measures are also implemented for the subsequent incorporation of the remedied area in the landscape.

Treatment of the K IV/E sludge lagoon con-sists of the construction of an elastic layer formed by alternating layers of whole tires and layers of shredded tires interlaid with recycled materials to achieve an effective cover. Approximately 79,000 tons/year of stabilized/solidifed waste is used at the K IV/E lagoon. Since 2002, 1,123,000 tons of stabilized/solidifed waste have been used in this project (750,000 tons of sta-bilized/solidifed waste plus 228,000 tons of tires).