MULTICOMPONENT ION EXCHANGE: NITRATE-REMOVAL PROCESS WITH LAND-DISPOSALBE REGENERANT.

The research described was undertaken to provide the missing data and to propose hypotheses concerning the prediction and control of anion exchange selectivity in general. A further objective was to provide a means of describing the multicomponent chromatographic column behavior of anion-exchange resins, especially weak-base resins, in nitrate removal service. A final objective was to perform technical and economic evaluations comparing a conventional, single-bed, strong-base, nitrate removal process to a two-bed, strong-acid, weak-base, nitrate removal process which would produce a spent ammonium nitrate regenerant amenable to disposal as a fertilizer.