German Scientists Propose Removing Uranium From Fertilizer.

[NNadir]

2. This is correct, but Po-210 will always be found where uranium is present and secular equilibrium...

...has been established.

Secular equilibrium can be disturbed by processing of course. A big issue, one generally ignored, is that the secular equilibrium between uranium-238 and its decay daughter Ra-226 is disturbed in the process of fracking in the gas fields in the eastern US, with the radium being carried in the (discarded) flow back water. Radium-226 with a half life of only 1600 years is extremely radioactive, and it in turn establishes secular equilibrium with Po-210 in its decay series.

(This secular equilibrium is disturbed in the oceans, which contain about 4 billion tons of uranium at saturation (currently observed) because of the insolubility of radium carbonate and radium sulfate.)

Thus we have increased the surface load of both radium and polonium by means of satisfying our short term greed - at the expense of all future generations - to have more dangerous natural gas. This problem will remain significant for many thousands of years into the future.

We couldn't care less.