Inorganic ion exchange using the Permutit (Zeolite) process replaces and with ions. When the zeolite bed () is finally exhausted and saturated with calcium (), how is it chemically regenerated for reu

Question

Inorganic ion exchange using the Permutit (Zeolite) process replaces $Ca^{2+}$ and $Mg^{2+}$ with $Na^+$ ions. When the zeolite bed ($Na_2Z$) is finally exhausted and saturated with calcium ($CaZ$), how is it chemically regenerated for reuse?

Prashant Kotian · Accepted Answer

Correct answer: B. Zeolite softens water via: . Once the resin is exhausted (), the equilibrium is driven in reverse by flushing the column with a highly concentrated brine solution, displacing the and restoring the bed.

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