Re: Uptake of U, Ra and Th by plant life..

[Bernard L Cohen <blc+@pitt.edu>]

	You are asking for the soil to plant concentration factor. There 
is a huge literature on this, with some reviewed in my paper in Health 
Physics 49:239-245; 1985. It gives the ratio of mg/Kg in plants to mg/Kg 
in soil as: U-.0017, Th-.000036, Ra-.00065.

On Wed, 6 Dec 1995, MARK WINSLOW wrote:

> Does anyone know how much U, Th, and Ra plants will take up if grown
> in soil with unnaturally high concentrations of these isotopes.  The
> end question is:  How much if any hazard would there be cutting these
> plants down and if they could just be composted..
>    Mark