Ogata Banks

Question 1

what is F?

Answer 1

the mass of contaminant attached to a rock, quantified as the mass of contaminant sorbed to solids per unit mass of rock, F.

Question 2

what is the linear equilibrium isotherm equation?

Answer 2

F = Kd.c
F = mass of contaminant per unit mass of rock [-]
Kd = partition/distribution coefficient [L3/M]
c = concentration in aqueous solution [M/L3]

Question 3

what is partitioning?

Answer 3

The process of a contaminant originally in solution becoming distributed between there solution and the solid phase is called partitioning.Mathematically, it is described by a relationship called an isotherm (temperature dependent)

Question 4

What is the equilibrium sorption isotherm?

Answer 4

If the sorptive process is rapid compared to the flow velocity, the solute will reach an equilibrium condition with the sorbed phase

Question 5

What is the non-equilibrium sorption isotherm?

Answer 5

If the sorptive process is slow compared with the flow velocity, it may not reach equilibrium between the solute and the sorbed phase.

Question 6

what is the limitation of the linear isotherm model?

Answer 6

There is no limit for sorption, but the rock only has a finite number of sorption sites. Thus the linear equilibrium model should be limited to low aqueous concentrations.

Question 7

What is retardation?

Answer 7

Retardation is the effect of sorption that slows down contaminant movement