Potential formation of mutagenicity by low pressure-UV/H<sub>2</sub>O<sub>2</sub>during the treatment of nitrate-rich source waters

Semitsoglou-Tsiapou, Sofia; Templeton, Michael R.; Graham, Nigel; Mandal, Subrata Kr; Leal, Lucía Hernández; Kruithof, Joop C.

doi:10.1039/c7ew00389g

Cited by 10 publications

(5 citation statements)

References 43 publications

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“…However, the addition of H 2 O 2 largely mitigates the formation of bromate [232]. Similarly, if wastewaters contain large amounts of nitrate, the treatment by UV/H 2 O 2 AOP may result in increased mutagenicity of the treated effluent [233]. According to the literature, the incorporation of the nitrate-nitrogen into the organic matrix and the subsequent formation on nitrated/nitrosated compounds could be the reason that mutagenicity levels increase in treated waters.…”

Section: Prospects and Challenges Of Aopsmentioning

confidence: 99%

Advanced Oxidation Processes for the Removal of Antibiotics from Water. An Overview

Cuerda-Correa

Alexandre-Franco

Fernández-González

2019

Water

490

240

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In this work, the application of advanced oxidation processes (AOPs) for the removal of antibiotics from water has been reviewed. The present concern about water has been exposed, and the main problems derived from the presence of emerging pollutants have been analyzed. Photolysis processes, ozone-based AOPs including ozonation, O3/UV, O3/H2O2, and O3/H2O2/UV, hydrogen peroxide-based methods (i.e., H2O2/UV, Fenton, Fenton-like, hetero-Fenton, and photo-Fenton), heterogeneous photocatalysis (TiO2/UV and TiO2/H2O2/UV systems), and sonochemical and electrooxidative AOPs have been reviewed. The main challenges and prospects of AOPs, as well as some recommendations for the improvement of AOPs aimed at the removal of antibiotics from wastewaters, are pointed out.

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Section: Prospects and Challenges Of Aopsmentioning

confidence: 99%

Advanced Oxidation Processes for the Removal of Antibiotics from Water. An Overview

Cuerda-Correa

Alexandre-Franco

Fernández-González

2019

Water

490

240

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“…On the other hand, NOM could also be a sink for NO x because of the presence of aromatic moieties in its structure and therefore could inhibit the nitration/nitrosation reaction to some extent. , The overall effect of NOM will thus depend on the experimental conditions, and in particular on the relative concentrations of reactants. In our set-up, the presence of NOM (11 mg·L –1 ) in IMD or NO 2 – solutions containing resorcinol (10 –4 M) increased the amounts of nitro- and nitroso-resorcinols, showing that in this case, NOM favors the formation of the phenoxyl radical and of NO 2 .…”

Section: Resultsmentioning

confidence: 99%

New Route to Toxic Nitro and Nitroso Products upon Irradiation of Micropollutant Mixtures Containing Imidacloprid: Role of NO_x and Effect of Natural Organic Matter

Palma

Arbid

Sleiman

et al. 2020

Environ. Sci. Technol.

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In this study, we reveal the capacity of imidacloprid (a neonicotinoid insecticide) to photoinduce the nitration and nitrosation of three aromatic probes (phenol, resorcinol, and tryptophan) in water. Using a gas-flow reactor and a NO x analyzer, the production of gaseous NO/NO2 was demonstrated during irradiation (300–450 nm) of imidacloprid (10–4 M). Quantum calculations showed that the formation of NO x proceeds via homolytic cleavage of the RN–NO2 bond in the triplet state. In addition to gaseous NO/NO2, nitrite and nitrate were also detected in water, with the following mass balance: 40 ± 8% for NO2, 2 ± 0.5% for NO, 52 ± 5% for NO3 –, and 16 ± 2% for NO2 –. The formation of nitro/nitroso probe derivatives was evidenced by high-resolution mass spectrometry, and their yields were found to range between 0.08 and 5.1%. The contribution of NO3 –/NO2 – to the nitration and nitrosation processes was found to be minor under our experimental conditions. In contrast, the addition of natural organic matter (NOM) significantly enhanced the yields of nitro/nitroso derivatives, likely via the production of triplet excited states (3NOM*) and HO•. These findings reveal the importance of investigating the photochemical reactivity of water contaminants in a mixture to better understand the cocktail effects on their fate and toxicity.

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“…The formation of nitrite is important because it is a strong hydroxyl radical scavenger (k OH,NO2 = 1.0 Â 10 10 M À1 s À1 ) (Buxton et al, 1988). Nitrite can form when nitrate undergoes photolysis (Semitsoglou-Tsiapou et al, 2018;Vinge et al, 2020), and while nitrate has a low molar absorption at 254 nm, the high doses used in this work, coupled with high levels of nitrate (11 mg/L as N) can result in the formation of low levels of nitrite.…”

Section: Voc Destructionmentioning

confidence: 92%

Destruction of 1,4‐Dioxane and VOCs with UV‐H₂O₂ in a high alkalinity groundwater

Najm¹,

Linden

Liu

et al. 2022

AWWA Water Science

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Bench‐scale testing was conducted to evaluate the application of an Ultraviolet‐hydrogen peroxide (UV‐H2O2) advanced oxidation process (AOP) for the destruction of 1,4‐Dioxane (47 μg/L) and varying concentrations of three volatile organic chemicals (VOCs), including trichloroethylene (TCE), tetrachloroethylene (PCE), and 1,1‐dichloroethylene (1,1‐DCE), from three samples of groundwater containing high alkalinity (281 mg/L as CaCO3). The UV doses applied ranged from zero to 5500 mJ/cm2 while the H2O2 concentrations ranged from 0 to 16 mg/L. The results showed that the bicarbonate and carbonate alkalinity greatly dominated the hydroxyl radical consumption and thus the 1,4‐Dioxane destruction rate. The removal of perchlorate, chlorate, and nitrate prior to UV‐H2O2 treatment had no discernable effect on 1,4‐Dioxane destruction, while the removal of TOC increased the rate of 1,4‐Dioxane destruction by approximately 25%. Depending on the combination of H2O2 concentration and UV dose, 1,4‐Dioxane destruction ranged from negligible to greater than 99%.

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Potential formation of mutagenicity by low pressure-UV/H₂O₂during the treatment of nitrate-rich source waters

Abstract: LP-UV/H2O2 treatment of NOM-containing synthetic waters led to nitrite, nitrophenol and measurable but not mutagenic Ames responses in the presence of nitrate, where the NOM type affected the response levels.

Cited by 10 publications

References 43 publications

Advanced Oxidation Processes for the Removal of Antibiotics from Water. An Overview

Advanced Oxidation Processes for the Removal of Antibiotics from Water. An Overview

New Route to Toxic Nitro and Nitroso Products upon Irradiation of Micropollutant Mixtures Containing Imidacloprid: Role of NO_x and Effect of Natural Organic Matter

Destruction of 1,4‐Dioxane and VOCs with UV‐H₂O₂ in a high alkalinity groundwater

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Potential formation of mutagenicity by low pressure-UV/H2O2during the treatment of nitrate-rich source waters

Abstract: LP-UV/H2O2 treatment of NOM-containing synthetic waters led to nitrite, nitrophenol and measurable but not mutagenic Ames responses in the presence of nitrate, where the NOM type affected the response levels.

Cited by 10 publications

References 43 publications

Advanced Oxidation Processes for the Removal of Antibiotics from Water. An Overview

Advanced Oxidation Processes for the Removal of Antibiotics from Water. An Overview

New Route to Toxic Nitro and Nitroso Products upon Irradiation of Micropollutant Mixtures Containing Imidacloprid: Role of NOx and Effect of Natural Organic Matter

Destruction of 1,4‐Dioxane and VOCs with UV‐H2O2 in a high alkalinity groundwater

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Resources

About

Potential formation of mutagenicity by low pressure-UV/H₂O₂during the treatment of nitrate-rich source waters

New Route to Toxic Nitro and Nitroso Products upon Irradiation of Micropollutant Mixtures Containing Imidacloprid: Role of NO_x and Effect of Natural Organic Matter

Destruction of 1,4‐Dioxane and VOCs with UV‐H₂O₂ in a high alkalinity groundwater