SSSAJ Journal of Natural Resources and Life Sciences Education
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Published in Soil Sci Soc Am J 30:460-462 (1966)
© 1966 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Effect of Soil Humic Acids on Uptake of Fission Products by Excised Roots1

Ryo Tatsukawa and R. E. Franklin2

ABSTRACT

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.

NOTES

1 Published with permission of the Director of the Ohio Agr. Res. and Develop. Center as Journal Article no. 7-66. Presented before Div. S-3, Soil Science Society of America, Kansas City, Mo., Nov. 18, 1964. This study was supported by Public Health Service Research Grant RH 00124, from the Division of Radiological Health.

2 Post Doctoral Fellow and Assistant Professor, Ohio Agr. Res. Develop. Center and The Ohio State University. Senior author is in the Department of Agricultural Chemistry, University of Tokyo.

Received for publication February 11, 1966. Accepted for publication March 29, 1966.






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