At our project in La Ferte Bernard in France we have tested the combination of ERH and persulphate injection. The results showed tremendous VOC reduction in a high transmissive aquifer.
Chemical oxidation with persulphate requires a catalyst to get the oxidation reaction started. Elevating temperature is one of the applicable mechanisms. In case a transmissive aquifer requires extended heating in ERH projects, persulphate injection can be a very efficient method.