The hard part is building a ceramic that can handle heat, pressure and the corrosive salts produced during the reaction. Apparently it’s a Pick Two situation.
Just kidding, superfund is a big pool of money that was created to clean up toxic waste sites around the country.
In other words, a superfund site is an environmental disaster site targeted for cleanup by the FedGov.
So then the Feds have to step in and pay for it.
A number of these compounds have benzene rings in them, or nasty chlorine or fluorine bonds. Supercritical water, injected with oxygen, is literally liquid fire. You can fully oxidize anything that can be oxidized, and unlike incineration most of the product is in aqueous solution at the end where it can be filtered and collected instead of ejected into the atmosphere to become someone else's problem.