Objective of addition materials to hazardous waste for Stabilization.
The addition of chemicals to make them into a hard lump. To improve Engineering and reduce the release of contaminants in the environment.
Chemicals used addition to hazardous waste for stabilization as follow.
Inorganic substance
1. Cement : Mixed with sand and water to harden into lumps of concrete. (mixed fly ash) on.
Cracks and water seepage is acidic leakage of chemical contamination
2. Pozzolans : Fly ash is mixed with water and lime occur substance similar Cement
3. Lime :Hydroxide precipitate with heavy mental
4. Silicates: Used in liquid solidification has a flexible gel reduces cracking. But not suitable waste for heavy metal ion contamination.
Organic substance
1. Epoxy : No reaction with other substance. Use mixed with strong acid and base solvent.
2. Asphalts : Consider of the heat, Dissolved in Asphalts and products.
3. Urea-formaldehyde : Similar epoxy.
4. Polyesters : Complex structure caused water or air can’t through.