Distribution coefficients, Kds, for iodide in Canadian Shield lake sediments under oxic and anoxic conditions

In a series of laboratory studies, we determined the solid to liquid distribution coefficient, Kd, for iodine (125I) in Canadian Shield lake sediments and the loss rate of 125I from water to sediment for more accurate computer model predictions of the fate of 129I released from an underground disposal vault. The Kd values were determined under oxic and anoxic (reducing) conditions at sediment-to-water ratios of 1, 10 and 50% for organic sediment, peaty sediment, clayey silt/sand sediment and sand sediment. (author)