Speciation calculation kinetics effect

Hence, the estimated K,Uo values are about 2.6 and 12 times higher than the actual measured bioaccumulation factors. The result for PCB 180 appears substantially outside expected estimation errors. If all of the discrepancies were due to the speciation of the compounds in the culture media [and not because of kinetic effects or due to the large size of the molecules (see Fig. 10.4a)], this would mean that the fraction in truly dissolved form fiv/ (see Chapter 9, Illustrative Example 9.5) would have to be 0.39 (1/2.6) for PCB52 and 0.086 (1/12) for PCB180. From these values and the DOC concentration given in the problem statement, calculate the KiDOC values that would be required for the two compounds (see Illustrative Example 9.5, Eq. 1) ... 

Two considerations (1) kinetic limitations in aqueous sulfate/ sulfide species equilibration and (2) observed lateral and vertical differences in Grande Ronde groundwater chemistry, were evaluated for their effect on calculated solubilities and associated aqueous speciation. 

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