Monitoring photolysis and (solar photo)-Fenton of enrofloxacin by a methodology involving EEM-PARAFAC and bioassays: Role of pH and water matrix

Sciscenko, Iván; Garcia-Ballesteros, Sara; Sabater, C.; Castillo, M.A.; Escudero-Oñate, Carlos; Oller, Isabel; Arqués, A.

doi:10.1016/j.scitotenv.2020.137331

Cited by 35 publications

(45 citation statements)

References 69 publications

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“…On the other hand, in SW matrices, a worst performance can be also ascertained, especially at pH = 3 that could be due to competitive degradation of catechol with CECs. In addition, it might imply low mineralization yields in SW despite the faster removal of the different CECs [59]. Further studies are recommended in this regard.…”

Section: Photo-fenton Systemmentioning

confidence: 99%

“…H 2 O 2 measurements were performed through peroxide tests (colorimetric test strips method, 0.5-25 and 1-100 mg/L H 2 O 2 Merckoquant-Merck, Madrid, Spian). In parallel, the PDS and H 2 O 2 concentrations were measured in all of the experiments spectrophotometrically (UH5300-Hitachi Spectrophotometer) with a iodometric titration and the metavanadate method, respectively [59,61]. pH and conductivity were determined by the VWR pHenomenal MU61002.…”

Section: Analytical Measurementsmentioning

confidence: 99%

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Enhancement of Iron-Based Photo-Driven Processes by the Presence of Catechol Moieties

et al. 2021

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Photo-induced Advanced Oxidation Processes (AOPs) using H2O2 or S2O82− as radical precursors were assessed for the abatement of six different contaminants of emerging concern (CECs). In order to increase the efficiency of these AOPs at a wider pH range, the catechol organic functional compound was studied as a potential assistant in photo-driven iron-based processes. Different salinity regimes were also studied (in terms of Cl− concentration), namely low salt water (1 g·L−1) or a salt–water (30 g·L−1) matrix. Results obtained revealed that the presence of catechol could efficiently assist the photo-Fenton system and partly promote the photo-induced S2O82− system, which was highly dependent on salinity. Regarding the behavior of individual CECs, the photo-Fenton reaction was able to enhance the degradation of all six CECs, meanwhile the S2O82−-based process showed a moderate enhancement for acetaminophen, amoxicillin or clofibric acid. Finally, a response-surface methodology was employed to determine the effect of pH and catechol concentration on the different photo-driven processes. Catechol was removed during the degradation process. According to the results obtained, the presence of catechol in organic macromolecules can bring some advantages in water treatment for either freshwater (wastewater) or seawater (maritime or aquaculture industry).

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Section: Photo-fenton Systemmentioning

confidence: 99%

Section: Analytical Measurementsmentioning

confidence: 99%

Enhancement of Iron-Based Photo-Driven Processes by the Presence of Catechol Moieties

et al. 2021

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“…In order to gain further insight into the efficiency of each AOP studied on the degradation of a more complex pollutant commonly found in real effluents, ENR was chosen as a target compound. This product is a widely employed antibiotic that belongs to the family of fluoroquinolones [40,54] and, furthermore, its photo-Fenton degradation has been recently studied by the authors [55].…”

Section: Enrofloxacin Removal and Mineralizationmentioning

confidence: 99%

Magnetic Photocatalyst for Wastewater Tertiary Treatment at Pilot Plant Scale: Disinfection and Enrofloxacin Abatement

Sciscenko

Mestre

Climent³

et al. 2021

Water

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In this work, we have tested a photocatalytic material consisting of a core of SiO2/Fe3O4 coated with TiO2 (Magnox) for plausible tertiary wastewater treatment. For this, a pilot plant of 45 L equipped with an Ultraviolet light (UVC) lamp was employed to study the degradation of a model contaminant, enrofloxacin (ENR), as well as water disinfection (elimination of Escherichia coli and Clostridium perfringens). The influence of different operational conditions was explored by means of dye (rhodamine-B) decolorization rates, analyzing the effects of photocatalyst quantity, pH and recirculation flow rates. The magnox/UVC process was also compared with other four Advanced Oxidation Processes (AOPs): (i) UVC irradiation alone, (ii) hydrogen peroxide with UVC (H2O2/UVC), (iii) Fenton, and (iv) photo-Fenton. Although UVC irradiation was efficient enough to produce total water disinfection, only when employing the AOPs, significant degradations of ENR were observed, with photo-Fenton being the most efficient process (total enrofloxacin removal in 5 min and c.a. 80% mineralization in 120 min, at pH0 2.8). However, Magnox/UVC has shown great pollutant abatement effectiveness under neutral conditions, with the additional advantage of no acid or H2O2 addition, as well as its plausible reuse and simple separation due to its magnetic properties.

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“…Although there is some information on the application of photo-Fenton process to highly saline water [18][19][20], we think that it is interesting to gain further insight into the effect of salinity on the process at different pHs, as recently good performance of mild photo-Fenton in solutions with high concentrations of salts has been detected [21,22]. As both processes might be ruled by changes in the coordination sphere of iron, some crosseffect between changes in the concentration of Cl − and OH − are expected and, as far as we know, there is no work devoted to clarifying this issue.…”

Section: Introductionmentioning

confidence: 99%

Effect of Salinity on UVA-Vis Light Driven Photo-Fenton Process at Acidic and Circumneutral pH

Vallés

Santos‐Juanes

Amat

et al. 2021

Water

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In the present work, the treatment of a mixture of six emerging pollutants (acetamiprid, acetaminophen, caffeine, amoxicillin, clofibric acid and carbamazepine) by means of photo-Fenton process has been studied, using simulated sunlight as an irradiation source. Removal of these pollutants has been investigated in three different aqueous matrices distinguished by the amount of chlorides (distilled water, 1 g L−1 of NaCl and 30 g L−1 of NaCl) at a pH of 2.8 and 5.0. Interestingly, the presence of 1 g L−1 was able to slightly accelerate the pollutants removal at pH = 5, although the reverse was true at pH = 2.8. This is attributed to the pH-dependent interference of chlorides on photo-Fenton process, that is more acute in an acidic medium. As a matter of fact, the fastest reaction was obtained at pH = 3.5, in agreement with literature results. Monitoring of hydrogen peroxide consumption and iron in solution indicates that interference with chlorides is due to changes in the interaction between iron and the peroxide, rather than a scavenging effect of chloride for hydroxyl radicals. Experiments were also carried out with real seawater and showed higher inhibition than in the NaCl experiments, probably due to the effect of different dissolved salts present in natural water.

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Monitoring photolysis and (solar photo)-Fenton of enrofloxacin by a methodology involving EEM-PARAFAC and bioassays: Role of pH and water matrix

Cited by 35 publications

References 69 publications

Enhancement of Iron-Based Photo-Driven Processes by the Presence of Catechol Moieties

Enhancement of Iron-Based Photo-Driven Processes by the Presence of Catechol Moieties

Magnetic Photocatalyst for Wastewater Tertiary Treatment at Pilot Plant Scale: Disinfection and Enrofloxacin Abatement

Effect of Salinity on UVA-Vis Light Driven Photo-Fenton Process at Acidic and Circumneutral pH

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