수용액상 니트로스아민의 UV 광분해에서 pH 영향 = Effect of pH on UV Photodegradation of N-Nitrosamines in Water

다국어 초록 (Multilingual Abstract)

N-nitrosamines are a class of carcinogenic chemicals that can pose significant hazards to the human life. Ultraviolet (UV) light irradiation is considered as one of the effective methods to reduce N-nitrosamines in the aqueous phase. This study aimed to investigate the pH influence on UV photodegradation of N-nitrosamines (i.e., N-nitrosodibutylamine (NDBA) and N-nitrosopyrrolidine (NPYR)) closely related to water treatment. Photodegradation rate constants of NDBA and NPYR remained between 3.26×10-2 L/W-min to 5.08×10-3 L/W-min and 1.14×10-2 L/W-min to 2.80×10-3 L/W-min at pH2-10, respectively. This study also focused on the formation of oxidized products (i.e., primarily NO2- and NO3-). Under slightly acidic and eutral conditions, NO2- formation was more prevalent than NO3- formation, while under strong acidic conditions, NO3- was more prevalent. There was no significant change in total organic carbon (TOC) and total nitrogen (TN), suggesting negligible loss of N-nitrosamines and degradation products from the system. NDBA was easily photodegraded than NPYR. This study also demonstrated that a lower pH is a favorable condition for photolytic degradation of N-nitrosamines in water.

참고문헌 (Reference)

1 Mahanama, K. R. R., "Volatile N-Nitrosamines in Environmental Tobacco Smoke : Sampling, Analysis, Emission Factors, and Indoor Air Exposures" 30 (30): 1477-1484, 1996

2 "UVNATURE CO"

3 Lee, C., "UV Photolytic Mechanism of N-Nitrosodimethylamine in Water : Roles of Dissolved Oxygen and Solution pH" 39 (39): 9702-9709, 2005

4 Stefan, M. I., "UV Direct Photolysis of N-Nitrosodimethylamine(NDMA) : Kinetic and Product Study" 85 (85): 1416-1426, 2002

5 Andrzejewski, P., "The Hazard of N-nitrosodimethylamine(NDMA)Formation during Water Disinfection with Strong Oxidants" 176 : 37-45, 2005

6 Salvo, F. D., "Synthesis, Structure, and Reactivity of Aliphatic Primary Nitrosamines Stabilized by Coordination to [IrCl5]2-" 27 (27): 1985-1995, 2008

7 Ohwada, T., "Structural Features of Aliphatic N-Nitrosamines of 7-Azabicyclo [2.2.1] heptanes that Facilitate N-NO Bond Cleavage" 123 (123): 10164-10172, 2001

8 Fan, T. Y., "Stability of N-Nitroso Compounds" 37 : 274-276, 1972

9 Barnes, J. M., "Some Toxic Properties of Dimethylnitrosamine" 11 : 167-174, 1954

10 Miyashita, Y., "Removal of N-Nitrosamines and Their Precursors by Nanofiltration and Revere Osmosis" 135 (135): 788-795, 2009

11 Sen, N. P., "Rapid Semi- Quantitative Estimation of N-Nitrosodibutylamine and N-Nitrosodibenzylamine in Smoked Hams by Solid-Phase Microextraction Followed by Gas Chromatography-Thermal Energy Analysis" 788 : 131-140, 1997

12 Xu, B., "Rapid Degradation of New Disinfection By-Products in Drinking Water by UV Irradiation : N-Nitrosopyrrolidine and N-Nitrosopiperidine" 69 (69): 126-133, 2009

13 Sorensen, L., "Preliminary Studies into the Environmental Fate of Nitrosamine and Nitramine Compounds in Aquatic Systems" 37 (37): 683-690, 2013

14 Kohut, K. D., "Polyelectrolyte Age and N-Nitrosodimethylamine Formation in Drinking Water Treatment" 38 (38): 719-735, 2003

15 Xu, B., "Photodegradation of N-Nitrosodiethylamine in Water with UV Irradiation" 53 (53): 3395-3401, 2008

16 Sorensen, L., "Photodegradation in Natural Waters of Nitrosamines and Nitramines Derived From Co2 Capture Plant Operation" 32 : 106-114, 2015

17 Plumlee, M. H., "Photochemical Attenuation of N-Nitrosodimethylamine(NDMA)and Other Nitrosamines in Surface Water" 41 (41): 6170-6176, 2007

18 Chen, Z., "Oxidative Degradation of N-Nitrosopyrrolidine by the Ozone/UV Process : Kinetics and Pathways" 38 (38): 4835-4841, 2015

19 Gushgari, A. J., "Occurrence of N-Nitrosamines in U.S. Freshwater Sediments Near Wastewater Treatment Plants" 1-7, 2016

20 Wang, W., "Occurrence and Profiling of Multiple Nitrosamines in Source Water and Drinking Water of China" 551 : 489-495, 2016

21 Padhye, L., "Occurrence and Fate of Nitrosamines and Their Precursors in Municipal Sludge and Anaerobic Digestion Systems" 43 (43): 3087-3093, 2009

22 vGerrity, D., "Nitrosamines in Pilot-Scale and Full-Scale Wastewater Treatment Plants with Ozonation" 72 : 251-261, 2014

23 Nawrocki, J., "Nitrosamines and Water" 189 (189): 1-18, 2011

24 Chow, Y. L., "Nitrosamine Photochemistry : Reactions of Aminium Radicals" 6 : 354-360, 1973

25 Schreiber, I. M., "Nitrosamine Formation Pathway Revisited : The Importance of Chloramine Speciation and Dissolved Oxygen" 40 (40): 6007-6014, 2006

26 Xu, B., "Measurement of Dissolved Organic Nitrogen in a Drinking Water Treatment Plant: Size Fraction, Fate, and Relation to Water Quality Parameters" 409 (409): 1116-1122, 2011

27 Xu, B., "Inhibiting the Regeneration of N-Nitrosodimethylamine in Drinking Water by UV Photolysis Combined with Ozonation" 168 (168): 108-114, 2009

28 Krasner, S., "Impact of Waste Water Treatment Processes on Organic Carbon, Organic Nitrogen, and DBP Precursors in Effluent Organic matter" 43 : 2911-2918, 2009

29 Kodamatani, H., "Highly Sensitive Method for Determination of N-Nitrosamines Using High-Performance Liquid Chromatography with Online UV Irradiation and Luminol Chemiluminescence Detection" 1216 (1216): 92-98, 2009

30 Zhang, J., "Fully Automated Analysis of Four Tobacco-Specific N-Nitrosamines in Main Stream Cigarette Smoke Using Two-Dimensional Online Solid Phase Extraction Combined with Liquid Chromatography-Tandem Mass Spectrometry" 146 : 216-224, 2016

31 Wilczak, A., "Formation of N-Nitrosodimethylamine(NDMA)in Chloraminated Water Coagulated with DADMAC Cation Polymer" 95 (95): 94-106, 2003

32 Mitch, W. A., "Formation of N-Nitrosodimethylamine(NDMA)from Dimethylamine during Chlorination" 36 (36): 588-595, 2002

33 "Formation in Drinking Water Treatment" 38 (38): 719-735,

34 Xu, B., "Factors Influencing the Photodegradation of N-Nitrosodimethylamine in Drinking Water" 3 (3): 91-97, 2009

35 Zhou, C., "Factors Affecting Ultraviolet Irradiation/Hydrogen Peroxide (UV/H2O2) Degradation of Mixed N-Nitrosamines in Water" 231 : 43-48, 2012

36 Polo, J., "Efficient Photolytic Degradation of Nitrosamines" 56 : 997-1001, 1976

37 Pozzi, R., "Determination of Nitrosamines in Water by Gas Chromatography/ Chemical Ionization/Selective Ion Trapping Mass Spectrometry" 1218 (1218): 1808-1814, 2011

38 Charrois, J. W. A., "Detecting N-Nitrosamines in Drinking Water at Nanogram per Liter Levels Using Ammonia Positive Chemical Ionization" 38 (38): 4835-4841, 2004

39 Wang, X., "Derivatization Method for Determination of Nitrosamines by GC-MS" 73 : 321-327, 2011

40 Xu, B., "Comparison of N-Nitrosodiethylamine Degradation in Water by UV Irradiation and UV/O3: Efficiency, Product and Mechanism" 179 (179): 976-982, 2010

41 Zhao, Y., "Characterization of New Nitrosamines in Drinking Water Using Liquid Chromatography Tandem Mass Spectrometry" 40 (40): 7636-7641, 2006

42 Ngongang, A. D., "Analysis of Nine N-Nitrosamines Using Liquid Chromatography-Accurate Mass High Resolutionmass Spectrometry on a Q-Exactive Instrument" 7 (7): 24-26, 2015

43 Lee, M., "Analysis of N-Nitrosamines and Other Nitro(so) Compounds in Water by High-Performance Liquid Chromatography with Post-Column UV Photolysis/Griess Reaction" 47 (47): 4893-4903, 2013