See pp. 234ff of my book "Radioactivity in the Environment" for some generally applicable values and references to other values. Ron Kathren On Thu, 6 Apr 1995, meg macleod wrote: > Wheat is the best reference to find Kd values, distribution coefficient? > > Looking for the Kd values for the following elements in sediment: > > Ac, Bi, Cs, Pb, K, Ra, Tl, U. > > Looking for info. by today. >