564 TRANSURANIC ELEMENTS IN THE ENVIRONMENT 



POLYETHYLENE PIPE 



PUMP 



[jllllllH WATER BYPASS 



PLASTIC SCREEN 



Fig. 15 Schematic representation of the BLVWS. 



available solute is removed by each sorption bed. When this approach is used to measure 

 the amount of solute, N, on the individual sorption beds, N^ and N^+i , the collection 

 efficiency, E, between beds m and m+ 1 can be determined from Eq. 1 (Schell, Nevissi, 

 and Huntamer, 1978). 



Nm -Nm+i 



^(m, m + i ) 



N 



0) 



m 



this efficiency can then be used to obtain the concentration of the solute in the soluble 

 phase, Cs- 



C. 



N 



m 



E(m, m + i) 



m-1 

 m 



m- 1 



(2) 



The total concentration, Ct, is found by adding the contribution of the particulates, 

 Cp, to the soluble. 



Ct = Cs + Cp (3) 



where E = collection efficiency between m and m + 1 beds 



Njy, = concentration of solute retained on the mth sorption bed 

 Nm+i = concentration of solute retained on tire m + 1 sorption bed 

 Cs = concentration of solute in the soluble fraction of the water 

 Cp = concentration of solute in the particulate fraction retained on the filters 

 Ct = total concentration of solute in the water volume sampled 



Tank Experiments with the BLVWS. The BLVWS has been evaluated at different 

 salinities in the laboratory by a series of tank experiments. The experimental procedures 

 are discussed in detail in an M.S. thesis by Huntamer (1976) and in papers by Schell, 

 Nevissi, and Huntamer (1978) and Nevissi and Schell (1976). Six elements, americium. 



