What does cation exchange resin mean in practice?
In the sodium form it softens, and in the hydrogen form it participates in demineralization; the use depends on the type of functional groups and ionic form.
When does it matter?
Oxidants and iron shorten durability, and operation without proper regeneration allows cations to break through.
Which solutions are related to it?
A strongly or weakly acidic resin is selected, the capacity in equivalents is calculated and it is protected with appropriate pre-treatment.