Chemical washing is a method of treating chemically contaminated soil and groundwater. This method involves injecting a chemical solution into the soil or groundwater to dissolve contaminants, then extracting them at the surface for removal.
The chemical washing process begins by identifying contaminated areas and selecting an appropriate chemical solution to dissolve the contaminants. The chemical solution is then injected into the contaminated soil or groundwater using injection wells.
The chemical solution reacts with the contaminants to dissolve them, making them more soluble and facilitating their extraction. The contaminated solution is then extracted at the surface using extraction wells and sent to a treatment unit to remove the contaminants.
The advantages of the chemical washing method are that it is effective in treating soil and groundwater contaminated by a wide variety of toxic chemicals, and is generally fast and efficient. It can also be used to treat contaminated sites in urban and residential areas.
As part of on-site or off-site remediation, other treatment methods can be used, such as anaerobic biostimulation, bioventing, composting, containment, thermal desorption, excavation, vacuum extraction, incineration, landfarming, chemical oxidation, phytomanagement, pyrolysis, chemical reduction, stabilization, stripping, biological treatment or granulometric sorting.