Chemical Immobilisation/Stabilisation

November 19, 2019

Chemical Immobilisation

Treating PFAS is a complex challenge but one that Enviropacific has demonstrated and is well equipped to do so.

One method is using thermal desorption of contaminated material; another is chemical immobilisation.

Chemical immobilisation, or stabilisation, is achieved by adding specialist reagents to the soil that chemically immobilise the PFAS constituents. This method reduces the potential chemicals to leach into the environment. The selection of the most effective specialist reagents and associated dosing rates are determined based on bench-scale testing of soils collected from the site. The use of different reagent dosing rates depends on the different types of segregated material. The final treated material can then be re-used on site or taken offsite to landfill for final disposal.

Enviropacific is experienced at using this technique having treated more than 10,000 tonnes of soil this way, and achieving reductions in leachable concentrations down from in excess of 750ug/L to <10ug/L.

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