Experimental Verification of a Unified Chlorine-Ammonia Reaction Model

by Richard L. Valentine, Univ of Iowa, Iowa City, IA, USA,
Chad T. Jafvert, Univ of Iowa, Iowa City, IA, USA,

Document Type: Proceeding Paper

Part of: Environmental Engineering


A model of the reacting aqueous chlorine-ammonia system is proposed which describes equally well the rapid 'breakpoint' oxidation of ammonia or the slow decomposition of chloramine solutions. Predicted concentrations of chlorine species compared closely with experimentally measured values obtained over a range in Cl/N ratios which spans those where either free chlorine or chloramines eventually dominate if given enough time to react. In addition, the model appropriately considers the catalysis of certain key reactions by several commonly encountered inorganics such as bicarbonate and phosphate species.

Subject Headings: Chlorine | Water treatment | Verification | Chemical treatment | Ammonia | Oxidation | Decomposition | Phosphate

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