The research discussed in this article was conducted to investigate and document the performance of conventional sodium‐form strong‐acid resins for the combined removal of barium, radium, and hardness under controlled conditions. The reasons for the study were: (1) the premature leakage of barium from strong‐acid ion exchange columns, (2) a lack of controlled laboratory studies to determine the factors affecting resin performance, and (3) a lack of documentation regarding the effect of the quantity of regenerant applied on effluent quality and on effluent quality as a function of the amount of water processed during a run.
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Snoeyink et al. (1987) studied this question.
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