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Calculator 13 - Retardation Calculator

RETARDATION COEFFICIENT CALCULATOR

**In all calculators keep the units consistent**
Also, see example calculation at bottom of page

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Retardation Calculator (calculate retardation factor)

pb (dry bulk density): 
 
2.65 g/cm^3 can be assumed for most mineral soils (Freeze & Cherry).

(porosity):  1) Porosity calculator 
2) Table of standard values (Freeze & Cherry)

Kd (distribution coefficient): 

Retardation Coefficient:   

 

Dry Bulk Density Calculator

Dry mass of soil particles:   
Volume of Sample: 

Dry Bulk Density:   


Example Calculation

The following is an example calculation for the retardation coefficient.

Given: Kd = 3 mL/g (newsletter Vol. 8 No. 5 will cover details about the distribution coefficient)

         pb = 1.75 g/cm3

             = 0.20

Calculation:

R = [1 + (pb/)(Kd)]

R = [1 + {((1.75 g/cm3)/0.20)(3 mL/g)(1cm3/1mL)}]

R = [1 + 26.25]

R = 27.25