The enhanced formation of N‐nitrosamines in fulvic acid mediated environment∗

Weerasooriya, S. V. R.; Dissanayake, C.B.

doi:10.1080/02772248909357505

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…Nitrite in the water environment can photochemically react with dimethylamine to undergo a nitrosation reaction to form N-nitrosodimethylamine (NDMA) . NDMA is a probable human carcinogen, even when present at nanogram per liter levels . Ayanaba and Alexander reported high rates of formation of NDMA in lake water containing dimethylamine and high nitrite.…”

Section: Resultsmentioning

confidence: 99%

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Overlapping Photodegradable and Biodegradable Organic Nitrogen in Wastewater Effluents

Simsek

Wadhawan

Khan

2013

Environ. Sci. Technol.

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Photochemical degradation of dissolved organic nitrogen (DON) in final effluent of trickling filter and activated sludge wastewater treatment plants (WWTPs) was studied. Inorganic N, mostly nitrite, was produced from the photodegradation of DON for samples from both WWTPs. Photodegradable DON (PDON), biodegradable DON (BDON), and overlapping photodegradable-biodegradable DON (OPBDON) were determined. BDON was associated with PDON as well as non-PDON. BDON and PDON concentrations in the final effluent samples were 4.71 and 4.62 mg N/L for the trickling filter plant and 3.95 and 3.73 mg N/L for the activated sludge plant, indicating that photodegradation is as important as biodegradation in the mineralization of effluent DON in receiving waters. OPBDON, which is more problematic in the water environment because it can be mineralized by light or bacteria or both, was 3.68 and 2.64 mg N/L (57% and 43% of total DON) in the final effluent samples from the trickling filter and activated sludge plants, respectively. The DON fraction that is resistant to biodegradation and photodegradation was 10% to 20% of total DON.

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Section: Resultsmentioning

confidence: 99%

“…30 NDMA is a probable human carcinogen, even when present at nanogram per liter levels. 31 Ayanaba and Alexander 32 reported high rates of formation of NDMA in lake water containing dimethylamine and high nitrite. Other organics such as fulvic acid also catalyze nitrosation of nitrite to form NDMA.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Overlapping Photodegradable and Biodegradable Organic Nitrogen in Wastewater Effluents

Simsek

Wadhawan

Khan

2013

Environ. Sci. Technol.

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“…However, several catalytic mechanisms of the reaction have been discovered. Photochemical reactions [99], formaldehyde [100] or fulvic acid [101] catalyzed reactions, may proceed at a neutral or even basic pH. The reader will find other examples of nitrosation reactions in nature in the review by Mitch et al [1] There are also some theoretical papers predicting catalytic nitrosation of DMA in the presence of carbon dioxide and carbonyl compounds [102,103].…”

Section: Mechanisms Of Ndma Formationmentioning

confidence: 97%

Nitrosamines and water

Nawrocki

Andrzejewski

2011

Journal of Hazardous Materials

179

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“…Although the rate of nitrosation is slow at neutral and NDMA AS A DRINKING WATER CONTAMINANT 391 basic pH, several studies indicate that photochemical reactions (Ohta et al, 1982), formaldehyde (Keefer and Roller, 1973) and fulvic acid (Weerasooriya and Dissanayake, 1989) can catalyze nitrosation at circumneutral pH. For example, Ayanaba and Alexander (1976) observed that the addition of high concentrations of nitrite to lake water containing dimethylamine resulted in the formation of NDMA.…”

Section: Nitrosation: Ndma Formation Via Nitritementioning

confidence: 99%

N-Nitrosodimethylamine (NDMA) as a Drinking Water Contaminant: A Review

Mitch¹,

Sharp²,

Trussell³

et al. 2003

Environmental Engineering Science

593

428

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N-Nitrosodimethylamine (NDMA) is a member of a family of extremely potent carcinogens, the N-nitrosamines. Until recently, concerns about NDMA mainly focused on the presence of NDMA in food, consumer products, and polluted air. However, current concern focuses on NDMA as a drinking water contaminant resulting from reactions occurring during chlorination or via direct industrial contamination. Because of the relatively high concentrations of NDMA formed during wastewater chlorination, the intentional and unintentional reuse of municipal wastewater is a particularly important area of concern. Although ultraviolet (UV) treatment can effectively remove NDMA, there is considerable interest in the development of less expensive alternative treatment technologies. These alternative technologies include approaches for removing organic nitrogen-containing NDMA precursors prior to chlorination and the use of sunlight photolysis, and in situ bioremediation to remove NDMA and its precursors.

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The enhanced formation of N‐nitrosamines in fulvic acid mediated environment∗

Cited by 10 publications

References 11 publications

Overlapping Photodegradable and Biodegradable Organic Nitrogen in Wastewater Effluents

Overlapping Photodegradable and Biodegradable Organic Nitrogen in Wastewater Effluents

Nitrosamines and water

N-Nitrosodimethylamine (NDMA) as a Drinking Water Contaminant: A Review

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