Abstract

A group of several zeolites, including Type A, clinoptilolite, erionite, phillipsite, and alumina-silica gel, was examined for the ability to selectively remove small amounts of strontium from aqueous wastes containing high concentrations of sodium salts. The techniques used in choosing a strontium-selective zeolite were comparative equilibrium distributions between zeolites and strontium-85-traced solutions, and statistical treatment of column data using strontium-85 concentration as the dependent variable. Type A zeolite was the most selective of the group for strontium, but more than a simple reversible exchange reaction was responsible for this strontium selectivity.

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