Photoelectrocatalytic degradation of pharmaceutical carbamazepine using Sb-doped Sn 80% -W 20% -oxide electrodes

Ghasemian, Saloumeh; Nasuhoglu, Deniz; Omanovic, Sasha; Yargeau, Viviane

doi:10.1016/j.seppur.2017.07.007

Cited by 32 publications

(11 citation statements)

References 55 publications

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“…Only a few TPs show an increasing concentration, corresponding to TPs accumulation in the reaction mixture. This is an evidence that [40,48] The results show that several intermediates were produced during all the investigated processes. Although many of these are already known in the literature, several new transformation products were identified.…”

Section: Identification Of the Transformation Products And Degradatiosupporting

confidence: 62%

“…Based on the described approach for the identification of the TPs and according to Schymanski et al [46], the identification level for detected TPs was 2 (probable structure), except for TP 129 formed during the photoelectrocatalysis treatment for which the identification level was 5 (exact mass of interest). [40,48] The results show that several intermediates were produced during all the investigated processes. Although many of these are already known in the literature, several new transformation products were identified.…”

Section: Identification Of the Transformation Products And Degradatiomentioning

confidence: 86%

“…The time-profiles of all identified TPs, obtained by plotting the peak area of each selected TP along reaction time, are shown in Figure A4 in the Appendix A. [40,48] The results show that several intermediates were produced during all the investigated processes. Although many of these are already known in the literature, several new transformation products were identified.…”

Section: Identification Of the Transformation Products And Degradatiomentioning

confidence: 99%

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Degradation of Carbamazepine by Photo(electro)catalysis on Nanostructured TiO2 Meshes: Transformation Products and Reaction Pathways

et al. 2020

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Carbamazepine (CBZ) is a pharmaceutical compound recalcitrant to conventional wastewater treatment plants and widely detected in wastewater bodies. In the present study, advanced oxidation processes for carbamazepine removal are investigated, with particular regard to the degradation pathways of carbamazepine by photoelectrocatalysis and conventional photocatalysis. Photoelectrocatalysis was carried out onto TiO2 meshes obtained by Plasma Electrolytic Oxidation, a well-known technique in the field of industrial surface treatments, in view of an easy scale-up of the process. By photoelectrocatalysis, 99% of carbamazepine was removed in 55 min while only 65% removal was achieved by photolysis. The investigation of the transformation products (TPs) was carried out by means of UPLC-QTOF/MS/MS. Several new TPs were identified and accordingly reaction pathways were proposed. Above 80 min the transformation products disappear, probably forming organic acids of low-molecular weight as final degradation products. The results demonstrated that photoelectrocatalysis onto TiO2 meshes obtained by plasma electrolytic oxidation is a useful alternative to common advanced oxidation processes as wastewater tertiary treatment aimed at removing compounds of emerging concern.

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Section: Identification Of the Transformation Products And Degradatiosupporting

confidence: 62%

Section: Identification Of the Transformation Products And Degradatiomentioning

confidence: 86%

Section: Identification Of the Transformation Products And Degradatiomentioning

confidence: 99%

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Degradation of Carbamazepine by Photo(electro)catalysis on Nanostructured TiO2 Meshes: Transformation Products and Reaction Pathways

et al. 2020

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“…Regarding tertiary treatments, advanced oxidation processes (AOPs), which are characterized by the formation of powerful oxidizing species, have been proved to be effective in the degradation of organic contaminants (Malato et al, 2009). Among available AOPs, ultraviolet treatment is one of the most extended processes for drinking and wastewater purification and, in particular, degradation of CBZ by UV and UV-based AOP has been widely reported in literature (Dai et al, 2012;Deng et al, 2013;Ghasemian et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Identification of transformation products of carbamazepine in lettuce crops irrigated with Ultraviolet-C treated water

Martínez-Piernas

Nahim–Granados²,

Polo-López³

et al. 2019

Environmental Pollution

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Transformation of organic microcontaminants (OMCs) during wastewater treatments results in the generation of transformation products (TPs), which can be more persistent than parent compounds. Due to reuse of reclaimed wastewater (RWW) for crop irrigation, OMCs and TPs are released in soils being capable to translocate to crops. Furthermore, OMCs are also susceptible to transformation once they reach the soil or crops. The recalcitrant antiepileptic carbamazepine (CBZ) and some of its frequently reported TPs have been found in agricultural systems. However, there is no knowledge about the fate in reuse practices of multiple CBZ TPs that can be formed during wastewater treatment processes. For the first time, this work presents a study of the behavior of CBZ TPs generated after a conventional Ultraviolet-C (UVC) treatment in an agricultural environment. The UVC-treated water was used for the irrigation of lettuces grown under controlled conditions. The latter was compared to the fate of TPs generated in the peat and plant by irrigation with non-treated water containing CBZ. A suspect screening strategy was developed to identify the TPs using liquid chromatography coupled to quadrupole-time-of-flight (LC-QTOF-MS). The results revealed the presence of 24 TPs, 22 in UVC-treated water, 11 in peat and 9 in lettuce leaves. 4 of the TPs identified in peat (iminostilbene, TP 271B, TP 285A-B); and 3 in leaves (10-11 dihydrocarbamazepine, TP 271A-B) were not previously reported in soils or edible parts of crops, respectively. Comparing the TPs found in peat and lettuces derived from both irrigation conditions, no significant differences regarding TPs formation or occurrence were observed. UVC treatment did not contribute to the formation of different TPs than those generated by transformation or metabolism of CBZ in peat or plant material. This research improves the current knowledge on the fate of CBZ TPs in agricultural systems as a consequence of reuse practices.

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“…Catalysts 2018, 8, x FOR PEER REVIEW 2 of 10 present work we have also chosen to employ photoanodes made by depositing mesoporous nanoparticulate titania on FTO electrodes. Among water-born organic pollutants that have attracted the interest of researchers, dyes and pharmaceutical compounds receive the greatest attention [3][4][5][6][7][9][10][11][12][13]. Both are extensively used, the former in the textile and leather industry, while the latter are consumed as drugs for humans and animals.…”

Section: Introductionmentioning

confidence: 99%

Photoelectrocatalytic vs. Photocatalytic Degradation of Organic Water Born Pollutants

et al. 2018

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The azo dye Basic Blue 41 was subjected to photocatalytic and photoelectrocatalytic degradation using nanopararticulate titania films deposited on either glass slides or Fluorine doped Tin Oxide (FTO) transparent electrodes. The degradation was carried out by irradiating titania films with weak ultraviolet (UVA) radiation. The degradation was faster when using FTO as a titania support even without bias and was further accelerated under forward electric bias. This result was explained by enhanced electron-hole separation even in the case of the unbiased titania/FTO combination. This system for organic material photocatalytic degradation was also successfully applied to the degradation of the anti-inflammatory drug piroxicam, which demonstrated a well distinguished degradation behavior in going from a plain glass support to unbiased and biased FTO. The degradation pathway of piroxicam has been additionally studied using liquid chromatography-accurate mass spectrometry analysis.

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Photoelectrocatalytic degradation of pharmaceutical carbamazepine using Sb-doped Sn 80% -W 20% -oxide electrodes

Cited by 32 publications

References 55 publications

Degradation of Carbamazepine by Photo(electro)catalysis on Nanostructured TiO2 Meshes: Transformation Products and Reaction Pathways

Degradation of Carbamazepine by Photo(electro)catalysis on Nanostructured TiO2 Meshes: Transformation Products and Reaction Pathways

Identification of transformation products of carbamazepine in lettuce crops irrigated with Ultraviolet-C treated water

Photoelectrocatalytic vs. Photocatalytic Degradation of Organic Water Born Pollutants

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