Key variables in a typical two-step demineralizingprocess involving strong-acid cation exchange followedby strong-base anion exchange, and theireffects on capacity and leakage are shown in TableII. The list is incomplete, but the variables are themajor ones that affect the process (other thanequipment design, mechanical breakdown, andoperator expertise). The first eight variables arewater-composition factors over which plant engineers have little or no control. But the remainingvariables can be controlled.
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