Photoenhanced transformation of nicotine in aquatic environments: Involvement of naturally occurring radical sources

Passananti, Monica; Temussi, Fabio; Iesce, M. R.; Previtera, Lucio; Mailhot, Gilles; Vione, Davide; Brigante, Marcello

doi:10.1016/j.watres.2014.02.016

Cited by 33 publications

(19 citation statements)

References 38 publications

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“…Similar results were obtained by Fabbri et al (2015) who studied the photochemical fate of cephalosporins in surface waters and reported amoxicillin half-life times increasing up to a plateau with increasing DOC (Fabbri et al 2015). According to Passananti et al (2014), high DOC means elevated DOM and CDOM contents. For high DOC, direct photolysis can be affected due to the competitive effect between the substrate and CDOM for sunlight photons.…”

Section: Photochemical Modelingsupporting

confidence: 80%

Direct and indirect photolysis of the antibiotic enoxacin: kinetics of oxidation by reactive photo-induced species and simulations

Lastre-Acosta

Barberato

Parizi

et al. 2018

Environ Sci Pollut Res

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The purpose of this study was to investigate the aqueous phase photochemical behavior of enoxacin (ENO), an antibiotic selected as a model pollutant of emerging concern. The second-order reaction rate constants of ENO with hydroxyl radicals (HO) and singlet oxygen (O) were determined at pH 3, 7, and 9. Also, the rate constants of the electron transfer reaction between ENO and triplet states of chromophoric dissolved organic matter (CDOM*) are reported for the first time, based on anthraquinone-2-sulfonate (AQ2S) as CDOM proxy. The sunlight-driven direct and indirect ENO degradation in the presence of dissolved organic matter (DOM) is also discussed. The results show that direct photolysis, which occurs more rapidly at higher pH, along with the reactions with HO and AQ2S*, is the key pathway involved in ENO degradation. The ENO zwitterions, prevailing at pH 7, show k HO, k, and k of (14.0 ± 0.8) × 10, (3.9 ± 0.2) × 10, and (61.5 ± 0.7) × 10 L mol s, respectively, whose differences at pH 3, 7, and 9 are due to ENO pH-dependent speciation and reactivity. These k values, along with the experimental ENO photolysis quantum yield, were used in mathematical simulations for predicting ENO persistence in sunlit natural waters. According to the simulations, dissolved organic matter and water depth are expected to have the highest impacts on ENO half-life, varying from a few hours to days in summertime, depending on the concentrations of relevant waterborne species (organic matter, NO, NO, HCO).

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Section: Photochemical Modelingsupporting

confidence: 80%

Direct and indirect photolysis of the antibiotic enoxacin: kinetics of oxidation by reactive photo-induced species and simulations

Lastre-Acosta

Barberato

Parizi

et al. 2018

Environ Sci Pollut Res

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“…This is also in line with the recent studies, showing that singlet oxygen plays only a minor role in the photochemical removal of xenobiotics in the environment catalyzed by natural organic matter. 43…”

Section: Resultsmentioning

confidence: 99%

New Route for Valorization of Oil Mill Wastes: Isolation of Humic-Like Substances to be Employed in Solar-Driven Processes for Pollutants Removal

García-Ballesteros¹,

Grimalt²,

Berto

et al. 2018

ACS Omega

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The valorization of olive oil mill solid wastes (OMW) has been addressed by considering it as a possible source of humic-like substances (HLSs), to be used as auxiliary substances for photo-Fenton, employing caffeine as a target pollutant to test the efficiency of this approach. The OMW-HLS isolation encompassed the OMW basic hydrolysis, followed by ultrafiltration and drying. OMW-HLS structural features have been investigated by means of laser light scattering, fluorescence, size exclusion chromatography, and thermogravimetric analysis; moreover, the capability of OMW-HLS to generate reactive species under irradiation has been investigated using spin-trap electronic paramagnetic resonance. The caffeine degradation by means of photo-Fenton process driven at pH = 5 was significantly increased by the addition of 10 mg/L of OMW-HLS. Under the mechanistic point of view, it could be hypothesized that singlet oxygen is not playing a relevant role, whereas other oxidants (mainly OH • radicals) can be considered as the key species in promoting caffeine degradation.

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“…Degradation of plastics in underwater environments is one of the main contributors of micro and nano plastics, and hence monitoring debris occurrence can help in mitigating their formation. Classification of plastics, in turn, helps with estimating the likelihood and speed of degradation processes [25], and helps in selecting appropriate cleaning measures. Our approach can also help coordinate micro and nano plastic monitoring efforts, e.g., by highlighting areas with significant plastic accumulation and then inform surface-based monitoring solutions to collect water samples from these areas.…”

Section: Discussionmentioning

confidence: 99%

Penguin

Flores

Zuniga

Motlagh

et al. 2020

Proceedings of the 6th ACM Workshop on Micro Aerial Vehicle Networks, Systems, and Applications

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Underwater plastic pollution is a significant global concern, affecting everything from marine ecosystems to climate change and even human health. Currently, obtaining accurate information about aquatic plastic pollutants at high spatial and temporal resolution is difficult as existing methods are laborious (e.g., dive surveys), restricted to a subset of plastics (e.g., aerial imaging for floating debris), have limited resolution (e.g., beach surveys), or are unsuited for aquatic environments (e.g., wireless sensing or Fourier-transform infrared spectroscopy). We propose PENGUIN, a work-in-progress AUV-based solution for identifying and classifying aquatic plastic pollutants. PENGUIN has been designed as the first system that can both recognize pollutants and classify them according to specifics of the material. We present the overall design of PENGUIN, introducing the different components of the architecture, and presenting current status of development. We also present results of plastic classification experiments using optical sensing, demonstrating that simple PPG sensors provide a low-cost and energy-efficient solution for classifying different plastics. Our solution can easily monitor larger underwater areas than what current techniques offer while at the same time capturing a wider range of pollutants. CCS CONCEPTS• Computer systems organization → Robotic autonomy; Robotic components.

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Photoenhanced transformation of nicotine in aquatic environments: Involvement of naturally occurring radical sources

Cited by 33 publications

References 38 publications

Direct and indirect photolysis of the antibiotic enoxacin: kinetics of oxidation by reactive photo-induced species and simulations

Direct and indirect photolysis of the antibiotic enoxacin: kinetics of oxidation by reactive photo-induced species and simulations

New Route for Valorization of Oil Mill Wastes: Isolation of Humic-Like Substances to be Employed in Solar-Driven Processes for Pollutants Removal

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