Effect of Soil Humic Acids on Uptake of Fission Products by Excised Roots1
- Ryo Tatsukawa and
- R. E. Franklin2
Two-phase membrane equilibrium systems were used to study complexing of humic acids with fission products and the effect of complexing on the uptake of fission products by excised roots. Humic acids from Rifle peat and an Alaskan peat were purified by centrifugation and resin column treatment. Higher concentrations and greater uptake of the fission products Fe59, Sr90, Ru106, and Cs137 from the Rifle peat humic acid suspensions than from equilibrium dialyzates indicated some form of complexing of the isotopes with the organic matter. The humic acid from the Alaskan peat exhibited very little suspension effect as measured by uptake. The degrees of complexing by the humic acid according to distribution of isotopes in the systems were in the order Fe ≫ Sr > Cs > I. Total uptake and the availability to plants of complexed isotopes tended to be in the reverse order.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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