Fate of N-Nitrosodimethylamine(NDMA) in water and evaluation of UV irradiation as a treatment process against NDMA

对东京地区河水和地下水中NDMA的浓度进行了检测，以显示饮用水中NDMA的浓度范围。用不同波长的紫外光照射NDMA溶液。结果表明，在不同波长下，NDMA的衰减速率不同，溶解有机物和硝酸盐的共存使NDMA的衰减速率恶化。此外，紫外线照射下的NDMA溶液进行氯胺化处理，导致NDMA没有明显的改造。本研究结果表明，紫外线照射是一种有效的治疗NDMA的方法。

NDMA concentration in river water and groundwater in Tokyo was examined to show the range of NDMA concentration in drinking water sources. Ultraviolet light at different wavelengths was irradiated against NDMA solution. The result indicated that decay rate differs at different wavelengths, and that co-existing matters including dissolved organic matter and nitrate deteriorate the decay rate of NDMA. Moreover, UV-irradiated NDMA solutions were subjected to chloramination, resulting in no significant reformation of NDMA. Results of this study indicated that UV irradiation is effective as a treatment process against NDMA.