Impact of UV-irradiation on the formation of odorous chloroaldimines in drinking water

Freuze, Ingrid; Brosillon, Stéphan; Arlot, Jérémy; Laplanche, A.; Tozza, Dominique; Cavard, J.

doi:10.1016/j.chemosphere.2005.10.023

Cited by 10 publications

(6 citation statements)

References 20 publications

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“…Leaching of chemicals from packaging materials and possible intentional or accidental contaminations can contribute VOCs to bottled waters. Pathogenic organisms are usually removed from finished drinking waters by chlorination to adequately safeguard public health (Freuze et al, 2006). THMs consisting of chlorinated and brominated organic compounds may be formed from the reactions of natural organic matter (NOM) with chlorine and bromine in finished drinking waters (Kruawal et al,chloroform (CHCl 3 ), bromodichloromethane (CHCl 2 Br), dibromochloromethane (CHClBr 2 ) and bromoform (CHBr 3 ).…”

Section: Introductionmentioning

confidence: 99%

Measurement of volatile organic compounds in bottled and tap waters by purge and trap GC–MS: Are drinking water types different?

Ikem

2010

Journal of Food Composition and Analysis

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Section: Introductionmentioning

confidence: 99%

Measurement of volatile organic compounds in bottled and tap waters by purge and trap GC–MS: Are drinking water types different?

Ikem

2010

Journal of Food Composition and Analysis

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“…It accounts for the non-instantaneous chloroform formation in this period and supports the fact that the chlorine demand of both solutions does not differ ( Figure 5). 55 hours after irradiation, the difference in Nk values between the irradiated and reference fractions of arginine solution may be partly attributed to a desamination or oxidation of the lateral chain of the amino-acid during UV exposure (Freuze et al, 2006). Creatinine treated with free chlorine at molar ratio of 1.4 gives in less than 1 hour two stable N-chlorocreatinine derivatives (Alouini and Seux, 1988;Tachikawa et al, 2005).…”

Section: Discussionmentioning

confidence: 98%

“…The average UV irradiance of the lamp was measured by chemical actinometry with potassium ferrioxalate, whose quantum yield remains quite constant over the spectral range of the lamp. The actinometer was purchased from Alfa Aesar and its irradiation was carried out as described by Freuze et al (2006). An average irradiance of 38.7 mW.cm -2 was calculated at the reactor's inner wall.…”

Section: Methodsmentioning

confidence: 99%

Effects of Medium-Pressure Uv Lamp Radiation on the Formation of Trihalomethanes in Chlorinated Swimming Pool Water

Hamel¹,

Clément²,

Seux³

2007

proc water environ fed

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We investigated the impact of UV irradiation on the formation of trihalomethanes using a medium-pressure mercury lamp, in conditions similar to those occurring in chlorinated swimming pools. Irradiation of real swimming pool water was first performed during 15s (UV dose: 580mJ.cm -2 ). Then model organic pollutants released by bathers (arginine and creatinine) were irradiated (UV dose: 380 mJ.cm -2 ) after a one-hour chlorination. In all cases irradiation leads to 40% increase in chloroform concentrations 55 hours after exposure, in comparison with the levels observed in dark controls. The applied doses are however about 5 times higher than those encountered in pool water treatment (about 100 mJ.cm -2 ). The promote effect of UV light on haloform formation may therefore appear to a lesser extent. Impact of UV irradiation is not immediate, but degradation of bather load to form chloroform is enhanced within the six hours which follow irradiation. Occurrence of a specific decomposition pathway induced by UV irradiation and leading to more haloform precursors cannot be highlighted. We indeed did not identify a few minutes after irradiation generation of new carbonyl compounds compared to those existing in dark controls. Acetaldehyde remains the major precursor and its concentration does not significantly increase, accounting for the non-instantaneous chloroform formation in this period. Further experiments are needed to precise the chloroform formation potential. In particular it would be necessary to rehearse the aldehyde quantification in the chlorinated arginine and creatinine solutions within 1 to 6 hours after irradiation, when the chloroform increase is more significant.

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“…It is also proving to be increasingly popular in the water industry, especially for drinking water and in the vending industry (Oguma et al 2001;EPA 2003;Jacangelo et al 2003). The fact that no toxic by-products are left in the water gives UV light an advantage over chlorine-based methods (Freuze et al 2006). The UV lamps used in this study produce UV light at a wavelength of 253.7 nm, described as UV-C radiation (Riesenman & Nicholson 2000).…”

Section: Introductionmentioning

confidence: 99%

“…At this wavelength, inactivation of bacterial cells occurs as a result of the formation of lesions in the genomic DNA, mainly cis-syn cyclobutane pyrimidine dimers (Oguma et al 2001). The fact that no toxic by-products are left in the water gives UV light an advantage over chlorine-based methods (Freuze et al 2006).…”

Section: Introductionmentioning

confidence: 99%

An in‐use comparison of in‐line and in‐tank ultraviolet devices for reduction of the microbial load in water coolers

2007

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Two ultraviolet (UV) systems were evaluated for use in water‐cooling devices: in‐tank (8 W, held in the centre of a 2‐L chilled water tank) and in‐line (6 W, treating chilled water at the point of dispense). The efficacy of these devices, under conditions of continual dispense (2 L/min), against a range of bacteria commonly associated with drinking water, was investigated. A rate of 1 L/min and the impact of a periodic dispense pattern (machine was not dispensing for 1 min between sampling) was examined with Escherichia coli. At 2 L/min, both devices achieved a 3 log reduction. At 1 L/min, both devices achieved greater than 4 log reduction. During periodic dispense, the in‐line device achieved a 3 log reduction, while the in‐tank device achieved greater than a 4 log reduction. UV was effective at reducing levels of bacteria commonly associated with water to acceptable levels. Under conditions of periodic use, the in‐tank device showed greater potential.

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Impact of UV-irradiation on the formation of odorous chloroaldimines in drinking water

Cited by 10 publications

References 20 publications

Measurement of volatile organic compounds in bottled and tap waters by purge and trap GC–MS: Are drinking water types different?

Measurement of volatile organic compounds in bottled and tap waters by purge and trap GC–MS: Are drinking water types different?

Effects of Medium-Pressure Uv Lamp Radiation on the Formation of Trihalomethanes in Chlorinated Swimming Pool Water

An in‐use comparison of in‐line and in‐tank ultraviolet devices for reduction of the microbial load in water coolers

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