Sorption--Desorption Studies on Tuff. I. Initial Studies with Samples from the J-13Drill Site,Jackass Flats,Nevada.

摘要

Distribution coefficients were determined for sorption--desorption of radionuclides between each of three different types of tuff from drill hole J-13at the Nevada Test Site and water from that well. The measurements were performed under atmospheric conditions at 22exp 0 C and 70exp 0 C. Sorption ratios vary greatly with lithologic variety of tuff. A tuff high in zeolite minerals has high sorption ratios (in decreasing order) for Eu,Ba,Cs,and Am and intermediate ratios for Sr and Pu. A tuff high in glass shows very high ratios for Ba,Sr,and Cs,intermediate values for Am and Pu,and low values for Ce and Eu. A devitrified tuff similar mineralogically to a microgranite exhibits intermediate values for Ba,Cs,Am,and Pu and low values for Eu,Ce,and Sr. Values for Ru are low,and those for Mo,Sb,and I are very low or zero for the three types. 34figures, 32tables. (ERA citation 04:043760)