Chemical States of Stable Zn and Aging Effect of ^<65>Zn in the Soil

概要

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The amount of stable Zn and the specific activity (S.A.) of ^<65>Zn in DTPA extract were pursued as a function of time after the administration of ^<65>Zn to Tanashi volcanic ash soil and Naka-gawa alluvial soil to investigate chemical states of Zn in the soils and also aging effect of ^<65>Zn introduced to the soils. There were at least 3 kinds of Zn pools, i.e. , rapid exchange pool (pool A; possibly soil solution), exchange pool (pool B; several tens of days are needed to attain in isotopic exchange equilibrium), and very slow exchange pool (pool C; several thousand days are needed to reach isotopic exchange equilibrium). The aging effect was not clearly observed because ^<65>Zn introduced into the soil remained in an available fraction (in pool A and B) for relatively long days.
日本放射線影響学会の論文