Hello,The ion xnge is good ...

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Hello,The ion xnge is good for removal of dissolved inorganics impurities.  iron removal better to use either oxydation/aeration( if PH is greater than 8.5) adding oxydation agent such as CL or KMNO4

In ion xnge the cation and anion xnge takes place with NACL solution(H as cation and OH as anion).