Methods for determining radionuclide retardation factors: status report

Abstract

The ideas and suggestions of Dr. Norman Hubbard (ONWI) are greatly appreciated. The experimental efforts of many researchers have been reviewed and incorporated into this paper. Appreciation is expressed to the principle investigators below and to the many others involved in their projects:

Radionuclide Distribution Coefficients of Sediments Collected from Borehole 299-E17-21: Final Report for Subtask 1a

“…The & measurements were made following the procedure described in Relyea et al (1980). These measurements were made with sediments that had been oven dried at 105°C.…”

“…shown to be a critical step for accurately measuring adsorption values and minimizing precipitation and/or coprecipitation of several radiotracers (Relyea et al 1980). Four sets of I(d values were measured using the experimental conditions presented in Table 2.…”

Solid waste leach characteristics and contaminant-sediment interactions Volume 2: Contaminant transport under unsaturated moisture contents

“…where B is the spike concentration in the influent blank, V is the volume of spiked groundwater added, E is the spike concentration in the effluent solution, X is the excess solution left from unspiked equilibration washes, and W is the weight of sediment (Relyea et al 1980;Relyea 1982). If none of a particular species is lost to the solid phase, then R,, = 0 and Rf = 1 for that species.…”

“…Sorption kinetics could also be a consideration for differences in column and batch tests. If the soil and solute contact time is too short in either of these tests, equilibrium will not be attained and thus the & value would be biased low (Relyea et al 1980;Relyea 1982 …”

Influence of soil/solution ratio on adsorption behavior of cesium on soils.

“…Since radionuclides are adsorbed on soil during the mi gration through shallow land systems, the adsorp tion behavior has been studied by many research scientists (Bachhuber et al, 1982;Relyea et al, 1980;Ryan, 1982).…”