Abstract
The possibility of removal and recovery of ammoniacal nitrogen from in-situ oil shale retort waters with weak acid cation exchange resins was investigated. The performance of several resins were compared and one resin selected for detailed evaluation. In this evaluation, the effect of various operating parameters on the effectiveness of the weak acid cation exchange system for NH/sub 4//sup +/-N removal was researched. Resin regeneration with both strong acids and CO/sub 2/ was evaluated. The results indicated some potential for the treatment of stripped retort waters with weak acid cation exchange resins in the sodium form. Recovery of NH/sub 4//sup +/-N from the resins and its separation from metals heavier than magnesium was accomplished by the use of dissolved CO/sub 2/.
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