A system for removing, separating and / or degrading one or more persistent organic pollutants (POPs) present in a substrate, the system comprising Means for providing a POP-contaminated substrate, - Means for carrying out a first reaction stage, comprising I. Adding a basic solution (solution 1) and optionally one or more additives selected from the group comprising a transphase catalyst (TPC) and a hydrogen peroxide dissociation catalyst to the substrate and II. Incubate the substrate with solution 1 and optionally one or more additives for at least 15 minutes and - Means for carrying out a second reaction stage, comprising III. Adding a hydrogen peroxide solution (solution 2) and optionally one or more additives selected from the group comprising a TPC and a hydrogen peroxide dissociation catalyst to the substrate, IV. Wherein a hydrogen peroxide dissociation catalyst and a TPC are added during the first and / or second reaction step.
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