Influence of DOM components, salinity, pH, nitrate, and bicarbonate on the indirect photodegradation of acetaminophen in simulated coastal waters

Bai, Ying; Cui, Zhengguo; Su, Rongguo; Qu, Kun

doi:10.1016/j.chemosphere.2018.04.087

Cited by 37 publications

(12 citation statements)

References 82 publications

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“…While bicarbonate (a component of hydrolyzed urine) acts as a hydroxyl radical scavenger, it also leads to the formation of carbonate radicals in UV-AOP systems, which in turn increases the degradation rates of acetaminophen and estrogenic compounds and could explain this matrix enhancement effect. 54,55 Similarly, all of the pharmaceuticals degraded faster in nanopure water compared to hydrolyzed synthetic urine when treated with plasma (Fig. 3a).…”

Section: Plasma Oxidation Treatment Is Consistent Across Different Sy...mentioning

confidence: 88%

Application of plasma for the removal of pharmaceuticals in synthetic urine

Rodrı́guez

Tarpeh

Wigginton

et al. 2022

Environ. Sci.: Water Res. Technol.

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Section: Plasma Oxidation Treatment Is Consistent Across Different Sy...mentioning

confidence: 88%

Application of plasma for the removal of pharmaceuticals in synthetic urine

Rodrı́guez

Tarpeh

Wigginton

et al. 2022

Environ. Sci.: Water Res. Technol.

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“…It shows that C1 had common features with C2, and C5 with C6. Previous works reported that the formation rate of singlet oxygen was coupled to the abundance of humic-like components emitting at long wavelength for DOM of both marine (Timko et al 2014;Bai et al 2018) and terrestrial origin (Batista et al 2016;Coelho et al 2011). Compared to these works, we were able to identify the moieties involved in the correlation, and we propose that C4 and C7 could be attributed to the reduced forms of quinonic humic-like components (Cory and McKnight 2005).…”

Section: Correlation Between Individual Parallel Factor Analysis Compmentioning

confidence: 72%

“…Previous works have shown that the capacity of DOM to generate reactive species under solar irradiation could be predicted measuring its absorbance properties (Dalrymple et al 2010;Mckay et al 2017;Peterson et al 2012;Palma et al 2020). Previous works also suggested that correlations may exist between DOM photoreactivity and fluorescence parameters (Coelho et al 2011) or individual fluorescent components identified by deconvolution of the three-dimensional spectra by parallel factor analysis (PARA-FAC, Timko et al 2014;Bai et al 2018;Batista et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Fluorescence analysis allows to predict the oxidative capacity of humic quinones in dissolved organic matter: implication for pollutant degradation

et al. 2020

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Dissolved organic matter (DOM) controls the degradation and sequestration of aquatic pollutants and, in turn, water quality. In particular, pollutant degradation is performed by oxidant species that are generated by exposure of DOM to solar light, yet, since DOM is a very complex mixture of poorly known substances, the relationships between potential oxidant precursors in DOM and their oxydative capacity is poorly known. Here, we hypothesized that production of oxidant species could be predicted using fluorescence analysis. We analysed water samples from an alluvial plain by fluorescence spectroscopy; the three-dimensional spectra were then decomposed into seven individual components using a multi-way algorithm. Components include a protein-like fluorophore, e.g. tryptophan-like and tyrosine-like, three humic fluorophores, 2-naphthoxyacetic acid, and a by-product. We compared component levels with the ability of water samples to generate reactive species under solar light. The results show a strong correlation between reactive species production and the intensity of two humic-like fluorophores assigned to reduced quinones. Monitoring these fluorophores should thus allow to predict the ability of DOM degradation of pollutants in surface waters.

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“…The best removal efficiency of KET (88.89%) was achieved over the Ag 3 PO 4 /P-g-C 3 N 4 composite at pH 7 after 60 min of irradiation. Under strongly acidic (pH 3) or alkaline (pH 11) conditions, KET degradation was significantly suppressed because of the inhibited formation of reactive species (RS) . It has been reported that at pH 9 there were more hydroxyl ions that could form • OH, which could accelerate the degradation efficiency compared with those under acidic conditions .…”

Section: Resultsmentioning

confidence: 99%

Nanocomposites of Ag₃PO₄ and Phosphorus-Doped Graphitic Carbon Nitride for Ketamine Removal

Guo

Chen

et al. 2019

ACS Appl. Nano Mater.

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As one of the most abused illicit drugs, ketamine (KET) has been widely detected in different water environments around the globe, which necessitates the development of effective approaches for KET removal from water. In the present study, several novel Ag 3 PO 4 /P-g-C 3 N 4 heterojunction composites were successfully constructed using an in situ growth method, and the samples were characterized by a series of instruments. The synthesized samples were deployed for KET degradation. Results showed that Ag 3 PO 4 / P-g-C 3 N 4 (1:1) exhibited the most excellent photocatalytic degradation performance on KET with a pseudo-first-order rate constant of 0.0326 min −1 at a neutral pH value, which was 3-and 6-fold faster than those of Ag 3 PO 4 and P-g-C 3 N 4 , respectively. The elevated photocatalytic performance of Ag 3 PO 4 /P-g-C 3 N 4 was attributed to the synergistic effects of the high charge separation capacity and Z-scheme heterojunction structure. Low concentrations of dissolved organic matter, nitrate, or bicarbonate accelerated KET degradation by Ag 3 PO 4 /P-g-C 3 N 4 , but high levels of these constituents would inhibit KET degradation. The scavenging experiments revealed that photogenerated superoxide radicals and holes were the main reactive species in the KET removal. A total of 12 degradation intermediates of KET over Ag 3 PO 4 /P-g-C 3 N 4 were identified, and a possible degradation pathway was proposed. Demethylation, dehydrogenation, hydroxylation, deamination, ring opening, and sodium modification were the major pathways for KET degradation. Ag 3 PO 4 /P-g-C 3 N 4 also exhibited a relatively good photocatalytic performance on KET degradation in surface water and a secondary effluent. KEYWORDS: Ag 3 PO 4 /P-g-C 3 N 4 , ketamine, degradation mechanism, intermediate, pathway

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Influence of DOM components, salinity, pH, nitrate, and bicarbonate on the indirect photodegradation of acetaminophen in simulated coastal waters

Cited by 37 publications

References 82 publications

Application of plasma for the removal of pharmaceuticals in synthetic urine

Application of plasma for the removal of pharmaceuticals in synthetic urine

Fluorescence analysis allows to predict the oxidative capacity of humic quinones in dissolved organic matter: implication for pollutant degradation

Nanocomposites of Ag₃PO₄ and Phosphorus-Doped Graphitic Carbon Nitride for Ketamine Removal

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Influence of DOM components, salinity, pH, nitrate, and bicarbonate on the indirect photodegradation of acetaminophen in simulated coastal waters

Cited by 37 publications

References 82 publications

Application of plasma for the removal of pharmaceuticals in synthetic urine

Application of plasma for the removal of pharmaceuticals in synthetic urine

Fluorescence analysis allows to predict the oxidative capacity of humic quinones in dissolved organic matter: implication for pollutant degradation

Nanocomposites of Ag3PO4 and Phosphorus-Doped Graphitic Carbon Nitride for Ketamine Removal

Contact Info

Product

Resources

About

Nanocomposites of Ag₃PO₄ and Phosphorus-Doped Graphitic Carbon Nitride for Ketamine Removal