为了处理饮用水中的N-亚硝基二甲胺（NDMA），研究了四种产生紫外光（UV）的不同灯:低压和中压汞弧灯（分别为LP和MP）以及两种不同的脉冲灯。使用准直光束几何形状、pH值为8.1的合成饮用水和100 ppb的初始NDMA浓度，分批进行实验（120 mL，3.5 cm光程）。虽然饮用水的浓度很高，但它的浓度很低，足以清洁饮用水- 观察到一级动力学。当辐照度规定在200至300 nm范围内时，基于紫外线剂量的去除速率常数范围为2.29 cm2/J（LP）至3.50 cm2/J（脉冲）。由于实验上的差异，基于时间的速率常数在不同类型的灯之间无法直接比较。为了获得2-log的NDMA去除率，脉冲灯的杀菌剂量（约350 mJ/cm2）明显低于LP或MP（分别为700和1000 mJ/cm2）。添加100 ppm H2O2对任何灯的电效率都没有有利影响。 两种脉冲灯的去除率不同，观察到的趋势无法用其200至300 nm的光谱输出来解释。据怀疑，波长低于200 nm的光化学反应是这些灯的一个重要因素。包括12个参考文献、表格和图表。

Four different lamps that produce ultraviolet light (UV) were investigated for treating N-nitrosodimethylamine (NDMA) in drinking water: low- and medium-pressure mercury (Hg) arc lamps (LP and MP, respectively), and two different pulsed lamps. Experiments were carried out in batch (120 mL, 3.5 cm pathlength) using collimated beam geometries, a synthetic drinking water at pH 8.1, and an initial NDMA concentration of 100 ppb. Although high for drinking water, this concentration is low enough that clean pseudo-1st order kinetics are observed. The UV dose-based removal rate constants range from 2.29 cm 2 /J (LP) to 3.50 cm 2 /J (pulsed) when the irradiance is specified over the 200 to 300 nm range. Because of experimental differences, the time- based rate constants are not directly comparable between lamp types. To obtain 2-log removal of NDMA, a much lower germicidal dose (approximately 350 mJ/cm 2 ) is apparently required with the pulsed lamps than with either LP or MP (700 and 1000 mJ/cm 2, respectively). The addition of 100 ppm H2O2 has no beneficial effect on the electrical efficiency of any of the lamps. The two pulsed lamps gave different removal rates, and the observed trends cannot be explained by their spectral output from 200 to 300 nm. It is suspected that photochemical reactions at wavelengths below 200 nm are a significant factor for these lamps. Includes 12 references, tables, figures.