Ammonia can be present in ...
Published by Rahul Kumar, Product Development Manager at Whirlpool Corporation
Ammonia can be present in water in two forms, either ammonium hydroxide (NH3) or as the ammonium ion (NH4).
When the pH of the water is less than 7 the ammonia is present as the ammonium ion. As pH increases above 7, more of the ammonia is present as ammonium hydroxide.
The ammonium ion is readily removed by cation resin. Good removal capacity can be expected in waters low in hardness. Waters that are high in hardness will have decreased capacity due to the simultaneous affinity and removal of calcium, magnesium and the ammonium ion.