Assumptions
In the
Calculation of the Mass Transfer Coefficients and Permeability Constants the following assumptions were made:
§The liquid-phase mass transfer coefficients are large
§Mass balances can be used to find concentration in one section of the cell
§The volume in each cell changes as a linear function over time according to initial and final volumes of each; the causes of volume change:
•Diffusion of deionized water across the membrane in both
directions
•Gradual loss of volume due to sampling process