Questions for Certification Action Line

摘要

1. Why are there floating bands of different ions going down through the cation resin column during the service cycle? 2. As the resin bed is being exhausted during the service cycle, bands of ions pass down through the resin bed in the order of their place in the selectivity series. During the down-flow service cycle, in what order would the following bands on ions (sodium, calcium, and magnesium) occur, from top to bottom, in the cation exchange resin bed?