Chemical Techniques

Chemical oxidation
Chemical oxidation has been a proven technique in recent years. Chemical oxidation can give us excellent results within a short period of time. This technique is particularly useful in core areas with high concentrations of contamination. Depending on the local state of the contamination, we apply the following chemical oxidation techniques:

• Chemical oxidation using hydrogen peroxide (Fenton’s Reagent).
• Applying ‘Advanced’ Fentons.
• Chemical oxidation using permanganate.
• Chemical oxidation using activated persulphate.

Chemical reduction: FENNA
As well as chemical oxidation, we also work with chemical reduction through injecting zero-valent iron nanoparticles. We combine this method with biological decomposition via our ENNA concept: FENNA. Click here for more information on the FENNA concept.

In-situ immobilisation
Not all forms of contamination are immediately suitable for remediation by extraction or through chemical or biological methods, for instance contamination from heavy metals. Immobilising a (partly) mobile contamination is also an option to prevent it from spreading to the air or to other parts in the soil. This will take away the risks of further contamination.

HMVT has been using chemical immobilisation on various types of contamination.