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N-Nitrosodimethylamine(NDMA) Formation according to Various Factors  

Kim, Jong-O (Department of Environmental Education, Mokpo National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.29, no.2, 2007 , pp. 192-196 More about this Journal
Abstract
In this study, a formation of N-nitrosodimethylamine(NDMA), a disinfection by-product, was investigated as a result of monochloramine addition in water. The NDMA formation was studied in terms of pH, dimethylamine(DMA), monochloramine concentration, and nitrogen composition in monochloramine. At a fixed DMA concentration of 0.01 mM or 0.05 mM, the NDMA formed concentration was quite different when the monochloramine to DMA ratio is less or greater than 1. The NDMA formation increased with increasing pH and a ratio of nitrogen composition in monochloramine to total nitrogen composition. At pH 7 and 8, more than five times higher NDMA formation was produced as a result of five times increase in DMA concentration. It was likely that monochloramine could be related to stimulate NDMA formation, if monochloramine may be produced with chlorine disinfection, in water treatment systems.
Keywords
N-nitrosodimethylamine(NDMA); Monochloramine; Water Treatment; Disinfection;
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