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Effective Treatment of N-Nitrosodimethylamine using Advanced Oxidation Process (UV Process) and Toxicity Evaluation  

Song, Won-Yong (Department of Environmental Engineering, Kyonggi University)
Chang, Soon-Woong (Department of Environmental Engineering, Kyonggi University)
Publication Information
Journal of Korean Society on Water Environment / v.25, no.1, 2009 , pp. 90-95 More about this Journal
Abstract
This study investigates the oxidative degradation of N-nitrosodimethylamine (NDMA), a probable human carcinogen, by advanced oxidation process (i.e., UV process). The experiments were performed with various pH, initial concentration, UV intensity, and addition of $H_2O_2$ or $TiO_2$ on UV process. The results showed that the direct UV photolysis was the most effective treatment method. The lower pH, intial concentration and higher intensity of UV stimulated higher NDMA removal. However, addition of oxidant ($H_2O_2$, $TiO_2$) slows down photochemical treatment of NDMA since the oxidant can filter out the UV light and block it to reach the NDMA molecules. Dimethylamine (DMA) and nitrite were found to be a major byproduct from NDMA oxidation. To evaluate the chronic toxicity effects of UV-treated NDMA on the growth of microalgae, "Skeletonema costatum", was studied as long term experiments. Results demonstrated that after the 13 days exposure the chronic toxicity was decreased about 15% with application of UV process on NDMA degradation.
Keywords
Dimethylamine (DMA); GC-NPD; N-nitrosodimethylamine (NDMA); Solid phase microextraction (SPME); Toxicity; UV;
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Times Cited By KSCI : 2  (Citation Analysis)
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