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Retardation Factor Calculator
Retardation Factor R = 1 + rbkd /q

R = retardation factor
rb = bulk density = rs(1-q)
rs = solids density
q = porosity
kd = (soil) distribution coefficient = foc Koc
foc = fraction organic carbon
Koc = organic carbon/water partition coefficient

Input Parameters
Site Name
Porosity (q ) (Try 0.25)
Fraction Organic Carbon (foc) (Try 0.0001)
Chemical Data Source
Data revision date

Default Parameters
Solids Density (rs) Default
Koc value L/kg

Bulk Density (rb) g/cm3
kd L/kg
Retardation Factor (R)

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