What is one common characteristic of using Ion Exchange for the removal of Iron and Manganese?

The use of ion exchange for the removal of iron and manganese commonly involves a regeneration cycle. In this process, ions in the water are exchanged with ions from a resin or a similar medium, allowing for the removal of undesirable cations like iron and manganese. Over time, as these ions accumulate on the resin, their capacity diminishes, making regeneration necessary to restore the resin's functionality.

During the regeneration cycle, a concentrated solution of a specific ion, typically sodium, is used to displace the accumulated iron and manganese ions from the resin, recharging it for further use. This cycle is crucial because it ensures the ion exchange process remains efficient and effective over time, enabling continuous treatment of water.

The other methods mentioned in the options lack the regeneration aspect, making them less suitable in the context of ion exchange specifically for iron and manganese removal.