IX Column modelling - trying not to reach equlibrium

[paznativ]

Hello all
when using the transport or exchange - the ion exchange reaches complete equilibrium, that is, the simulation is for an infinite retention time.
is there a way around this ?
is there a way to implement kinetics or use a fraction of the solution to reach equilibrium in each cell?

thanks in advance

Paz Nativ

[dlparkhurst]

Attached is a kinetic exchange calculation developed by Tony Appelo.

An alternative could be to use EXCHANGE in an immobile zone in TRANSPORT, which would allow exchange to achieve equilibrium more slowly.

[paznativ]

Thank you!
i will study the code.
again, thanks very much, it is really appreciated.

Paz