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A Study on N-Nitrosodimethylamine (NDMA) Formation According to pH Variation  

Kim, Jong-O (Department of Environmental Education, Mokpo National University)
Clevenger, Thomas (Department of Civil & Environmental Engineering, University of Missouri-Columbia)
Publication Information
Journal of Korean Society of Environmental Engineers / v.27, no.4, 2005 , pp. 390-393 More about this Journal
Abstract
N-nitrosodimethylamine (NDMA), a potent carcinogenic, has recently been observed at drinking water supply systems in USA and Canada. The NDMA formation was studied as a function of chloramine concentration (0.001-0.1 mM) at a fixed dimethylamine (DMA) concentration of 0.05 mM at different initial pH (6, 7, 8). It was found that the NDMA formation rate varied with pH values. The formation of NDMA increased with increasing chloramine concentration and showed maximum yields of 2.4% and 1.6% at pH 7 and 8, respectively. A good correlation ($r^2>0.99$) was observed between the molar ratio (chloramine/DMA) and NDMA formation at pH 7 and 8. Linearity of the NDMA formation appeared to be related to chloramine concentrations.
Keywords
N-nitrosodimethylamine (NDMA); Chloramine; Dimethylamine (DMA); Water Supply System;
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Times Cited By KSCI : 1  (Citation Analysis)
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