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Dissolved organic nitrogen (DON) is present in raw and finished drinking waters,although the DON concentrations have not been determined. DON analytical techniqueshave been established by marine scientists and freshwater ecologists, but have not beenapplied to drinking water systems specifically. Based upon United States GeologicSurvey (USGS) water quality monitoring data, over 23,000 water samples for DON werecalculated. The 50th percentile DON concentration, that were not below the detectionlimit of 2 mg-N/L, for surface water (0.34 mgN/L) was greater than the groundwaterconcentrations (0.24 and 0.17 mgN/L for shallow and deep groundwater, respectively).During drinking water treatment the removal of DON by different chemical and physicaltreatment processes is unknown. Model organic nitrogen material is reactive withoxidants and can form disinfection byproducts. Most DON in natural waters areconsidered to be proteinaceous material or recalcitrant high molecular weight humic-likematerial. This paper presents an overview on DON occurrence, measurement, reactivity,and treatment. Includes 28 references, table, figure.

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Edition: Vol. - No. Published: 06/16/2002 Number of Pages: 8File Size: 1 file , 300 KB