Chemical remediation involves the introduction of chemicals directly to the soil / water, compared to bioremediation this method is more rapid and can target a larger suite of contaminants including in-organic contaminants.
TRM have expertise in the following chemical remediation techniques:
- Chemical oxidation: Use of chemical oxidising agent to breakdown contaminants into less harmful by-products. The chemicals can either be injected into the ground, ISCO (in-situ chemical oxidation, to treat both contaminated soil and groundwater, or applied directly to excavated soil
- Stabilisation & Solidification: S/S is a combination of chemical and physical methods to remediate contaminated soil. It does not reduced the concentration of the contaminants but instead it utilises cementitious binders to chemically immobilise contaminants, converting them into a less soluble, toxic and mobile form. The soil/cement mixture then cures to form more a hard more compact material which encapsulates the contaminants in the matrix and the contaminants are less susceptible to leaching
- Water Pump & Treat Systems: Contaminated water (surface / groundwater) can be placed through a series of filters containing a chemical matrix which can remove the contaminants as the water passes through. The filters work by a process of absorption or adsorption, ionisation, oxidation or precipitation. The treated water can be disposed to:
- Groundwater: via infiltration wells directly into the groundwater / aquifer
- Surface water: pumping directly into a river, lake, pond etc
- Sewer: connection directly to a foul sewer system
- Off site: collection via tanker & disposal to a water treatment facility
Air stripper for VOC removal
