Fugacity capacities definition

Equilibrium. Equilibrium between compartments can be expressed either as partition coefficients K.. (i.e. concentration ratio at equilibrium) or in the fugacity models as fugacity capacities and Z. such that K.. is Z./Z., the relationships being depicted in Figur 1. Z is dellned as tfte ratio of concentration C (mol/m3) to fugacity f (Pa), definitions being given in Table I. 

Figure 1. Relationships between fugacity capacities and partition coefficients. See Table 1 for symbol definitions.

Definitions of Fugacity Capacities and Partition Coefficients Used in the Soil Compartment Model ... 

In this expression, Area is the horizontal area of contact between two compartments, m Ca is the bulk contaminant concentration in the air compartment, mol m and Cs is the bulk contaminant concentration in the surface soil compartment, mol m . Table 8.3 provides definitions of the fugacity capacities Zair, Zs, Za, and Zap. Table 8.2 provides suggested values for Va, PC, pap, and rain. Chapter 6 gives more details on obtaining values for these deposition parameters. But the key parameters in this expression are the air-side mass-transfer coefficient (MTC) Ua and the soil-side MTC f/s (m d ) as given below ... 

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