Laboratory and field evidence of the photonitration of 4-chlorophenol to 2-nitro-4-chlorophenol and of the associated bicarbonate effect

Maddigapu, Pratap Reddy; Vione, Davide; Ravizzoli, Barbara; Minero, Claudio; Maurino, Valter; Comoretto, Laetitia; Chirón, Serge

doi:10.1007/s11356-009-0260-z

Cited by 28 publications

(37 citation statements)

References 23 publications

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“…The time unit adopted in the cited model is the summer sunny day (SSD), which corresponds to a fair-weather 15 July at 45°N latitude. The incident UV energy in a SSD is equivalent to 10 hours continuous irradiation at 22 W m −2 UV irradiance (Maddigapu et al, 2010b).…”

Section: Modelling the Phototransformation Kinetics Of Ibp In Surfacementioning

confidence: 99%

Modelling the photochemical fate of ibuprofen in surface waters

Vione¹,

Maddigapu²,

Laurentiis³

et al. 2011

Water Research

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113

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Section: Modelling the Phototransformation Kinetics Of Ibp In Surfacementioning

confidence: 99%

Modelling the photochemical fate of ibuprofen in surface waters

Vione¹,

Maddigapu²,

Laurentiis³

et al. 2011

Water Research

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113

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“…The initial rates of 2NP formation were determined as the slopes for t→0 of the curves fitting the experimental data (see legend to Figure 1). For further details concerning experimental set-up and data treatment see [4]. The reproducibility of repeated runs was 15-20%.…”

Section: On the Effect Of 2-propanol On Phenol Photonitration Uponmentioning

confidence: 99%

“…Figure 1 shows the time evolution of 2NP upon UVB irradiation of 1 mM phenol, 0.10 M nitrate and variable concentrations of 2-propanol. Phenol concentration was chosen to ensure that it scavenged a significant fraction of bulk • NO 2 [4]. Figure 2 reports the initial formation rate of 2NP as a function of the alcohol concentration.…”

Section: On the Effect Of 2-propanol On Phenol Photonitration Uponmentioning

confidence: 99%

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On the effect of 2-propanol on phenol photonitration upon nitrate photolysis

Vione

Sur

Dutta³

et al. 2011

Journal of Photochemistry and Photobiology A: Chemistry

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“…O modelo utilizado neste estudo para descrever o destino ambiental fotoquímico da AMZ e da ATZ foi previamente validado para diferentes poluentes (MADDIGAPU et al, 2010;MADDIGAPU et al, 2011;VIONE et al, 2011;SUR et al, 2012;LAURENTIIS et al, 2012;LAURENTIIS et al, 2013;MARCHETTI et al, 2013 …”

Section: Modelo Fotoquímicounclassified

Fotodegradação dos herbicidas atrazina e amicarbazona em meio aquoso: destino ambiental e tratamento.

Silva¹

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Este exemplar foi revisado e corrigido em relação à versão original, sob responsabilidade única do autor e com a anuência de seu orientador. Dedico esse trabalho a Deus que me deu o dom da vida, aos meus pais Aurélio e Nair pelo amor, incentivo e carinho e ao meu namorado João pela paciência, compreensão e companheirismo. AGRADECIMENTOSAgradeço primeiramente e principalmente a Deus que sempre esteve comigo, me ajudando, em todas as etapas da vida e assim também em meu doutoramento.Aos meus pais Aurélio e Nair e a meus irmãos, pelo incentivo e carinho de sempre. Amo muito vocês.A meu namorado, João Parizi, por acompanhar cada detalhe do meu trabalho mesmo não sendo da área e sempre me apoiar todas as vezes que precisei. A Arlen Lastre-Acosta, minha amiga cubana, que também conheci ao longo do doutoramento, com a qual pude partilhar dúvidas, aprendizados e risadas.A Christiane Fonseca, amiga e companheira desde o início deste trabalho, obrigada pelas conversas e amizade.A Simón Mostafa, um presente de Deus nos EUA, além de contribuir muito em minha pesquisa, me ajudou também na adaptação ao novo país.A Cátia Graça, minha amiga portuguesa, pelo alto astral contagiante.A Paulo Firmino, por toda sua contribuição, disposição e ajuda na montagem e manutenção dos reatores.A Maria Elisete Monteiro, secretária do Departamento de Engenharia Química, que sempre me ajudou com as compras de produtos, passagens e inscrições em encontros científicos.A todos os amigos e familiares que torceram por mim. ABSTRACTThe presence of Persistent Organic Pollutants (POP) in aquatic environment is a subject of great concern, especially due to their capacity to affect not only aquatic organisms but also the human health. Herbicides as atrazine ( months to a year, for AMZ and ATZ, respectively. Besides the environmental fate, this investigation also aims to shine a light on the degradation of these contaminants in irradiated advanced oxidation processes. Accordingly, ATZ photolysis through the use of UV radiation (254 nm) was studied, whilst taking into consideration both the herbicide initial concentration and the specific photon emission rate. Another important contribution of this study is the investigation of the role of reactive oxygen species (ROS) in photolytic processes, a subject not usually discussed in the literature. In addition, a crossed-reference analysis between the results obtained for ATZ and those available in the literature for AMZ is presented. The degradation of both herbicides diminishes with the increase in their initial concentration and follows a pseudo first-order decay, increasing with the photon emission rate. Moreover, the results indicate that the formation of persistent degradation products does occur and that ROS play a crucial role in photolytic herbicide degradation.

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Laboratory and field evidence of the photonitration of 4-chlorophenol to 2-nitro-4-chlorophenol and of the associated bicarbonate effect

Cited by 28 publications

References 23 publications

Modelling the photochemical fate of ibuprofen in surface waters

Modelling the photochemical fate of ibuprofen in surface waters

On the effect of 2-propanol on phenol photonitration upon nitrate photolysis

Fotodegradação dos herbicidas atrazina e amicarbazona em meio aquoso: destino ambiental e tratamento.

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