From a New York Times investigative article about Natural Gas Wells – that use hydraulic fracturing – and the wastewater produced by it –
Yet sewage treatment plant operators say they are far less capable of removing radioactive contaminants than most other toxic substances. Indeed, most of these facilities cannot remove enough of the radioactive material to meet federal drinking-water standards before discharging the wastewater into rivers, sometimes just miles upstream from drinking-water intake plants.
So, why can’t they just reclaim these materials and sell them, including the radioactive elements which are obviously in the wastewater in a defined volume already? It isn’t like they have to go look for it.