What is the correct unit of sorbents in 1d model?

[Jeonghwan Hwang]

Hello, this is Jeonghwan Hwang.
Thank you for reading. I had a question to explain the 1d conceptual model.

I used the 1d transport code using the cation exchange model.
These result gave me the interesting result, but it is a little confusing in the process of explaining the modelling concept.

I set up 40 columns in 1d transport, and put 5 g of clay in each column.

In the case of the batch model, the model is set assuming that 1L of water is in the batch (e.g. 5 g/L of clay).
However, for a 1D model, it is calculated as the pore volume, not the volume of the solution.

To explain the model in this case, I wonder if it is correct to write with 5 g of clay or if it is correct to write with 5 g/L of clay.
I write some of my code below.

Thank you.
Sincerely,

Jeonghwan Hwang


===========================================================
 EXCHANGE_MASTER_SPECIES
    Z   Z-
 
 EXCHANGE_SPECIES
    Z- = Z-
    log_k 0.0
    -davies
    Na+ + KZ = NaZ + K+
    log_k -2.5
    -davies
    K+ + Z- = KZ
    log_k 0.0
    -davies
    Ca+2 + 2KZ = CaZ2 + 2K+
    log_k -10.7
    -davies
  end

 SOLUTION 1-40
    temp    23.0
    units moles/l
    Cs 1e-15
    K 1.0E-05

  EXCHANGE 1
    KZ  4.62E-08
  end
.
.
.
===========================================================

[dlparkhurst]

You define a number of moles in EXCHANGE and you define a volume (actually kilograms of water) with SOLUTION. Together they give the ratio of moles of exchanger per volume of water.