Photocatalytic degradation of atenolol in aqueous suspension of new recyclable catalysts based on titanium dioxide

Tammaro, Marco; Fiandra, Valeria; Mascolo, Maria Cristina; Salluzzo, Antonio; Riccio, Chiara; Lancia, A.

doi:10.1016/j.jece.2017.06.026

Cited by 24 publications

(8 citation statements)

References 51 publications

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“…ATL degradation also showed similar trend with pH variation. Similar findings were reported from previous studies (Wang et al 2019 ; Tammaro et al 2017 ).…”

Section: Resultssupporting

confidence: 92%

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Novel organic assisted Ag-ZnO photocatalyst for atenolol and acetaminophen photocatalytic degradation under visible radiation: performance and reaction mechanism

Ramasamy¹,

Jeyanthi²,

Chinnaiyan

2021

Environ Sci Pollut Res

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This study is on photocatalytic degradation of pharmaceutical residues of atenolol (ATL) and acetaminophen (ACT) present in secondary effluent under visible light irradiation stimulated by Ag doped ZnO (Ag-ZnO) photocatalyst. Lawsonia inermis leaf extract was used for reduction of Zinc sulphate to ZnO nanoparticles (NPs). Further, ZnO NPs were doped with Ag and characterized by XRD, FT-IR, SEM-EDX, surface area analyzer, UV-Vis, and photoluminescence spectrometry to analyze the structure, morphology, chemical composition, and optical property. FT-IR analysis revealed major functional groups such as OH, C=O, and SEM analysis depicted the polyhedron shape of the NPs with size range of 100 nm. Ag-ZnO NPs were used in the photocatalytic degradation of ATL and ACT, and its removal was evaluated by varying initial contaminant concentration, catalyst dosage, and initial pH. Findings indicate that Ag-ZnO NPs demonstrated relative narrow bandgap and efficient charge separation that resulted in enhanced photocatalytic activity under visible light illumination. The photocatalytic degradation of ATL and ACT fitted well with pseudo-first-order kinetic model. Further, it was found that under optimal conditions of 5 mg/L of contaminants, pH of 8.5, and catalyst dose of 1 g/L, degradation efficiency of 70.2% (ATL) and 90.8% (ACT) was achieved for a reaction time of 120 min. More than 60% reduction in TOC was observed for both contaminants and OH• pathway was found to be the major removal process. Ag-ZnO photocatalyst showed good recycling performance, and these findings indicate that it could be cost effectively employed for removing emerging contaminants under visible light radiation. Supplementary Information The online version contains supplementary material available at 10.1007/s11356-021-13532-2.

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“…ATL degradation also showed similar trend with pH variation. Similar findings were reported from previous studies (Wang et al 2019 ; Tammaro et al 2017 ).…”

Section: Resultssupporting

confidence: 92%

“…Earlier study by Thi and Lee ( 2017 ) on ACT degradation using La-doped ZnO reported 85% of TOC reduction in a reaction time of 180 min. Earlier studies on ATL have reported 70% removal of TOC in a reaction period of 180 min (Tammaro et al 2017 ; Ponkshe and Thakur 2019 ).…”

Section: Resultsmentioning

confidence: 95%

Novel organic assisted Ag-ZnO photocatalyst for atenolol and acetaminophen photocatalytic degradation under visible radiation: performance and reaction mechanism

Ramasamy¹,

Jeyanthi²,

Chinnaiyan

2021

Environ Sci Pollut Res

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“…The highest mineralization rate was observed for the photocatalysis treatment, in which 24% of TOC decreased in 5 min of the experiment and remained constant up until 30 min. Tammaro et al have reported a similar result for atenolol, but after 180 min of treatment. Bhatia et al obtained complete removal of TOC after treatment of atenolol with graphene TiO 2 composite but over a very prolonged contact time (7 h) making it impossible to apply in WTPs.…”

Section: Resultsmentioning

confidence: 64%

Oxidative treatments for atenolol removal in water: Elucidation by mass spectrometry and toxicity evaluation of degradation products

Quaresma

Sousa

Silva

et al. 2019

Rapid Comm Mass Spectrometry

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Rationale The presence of pharmaceuticals in water is a worldwide concern due to potential damage to human and environmental health. For example, compounds such as the β‐blocker atenolol (ATE), widely used for the treatment of cardiac disease, are detected in drinking water since conventional water treatment plants are not designed to remove them. Thus, the evaluation of ATE removal at different water oxidative treatment processes, identification of its degradation products and evaluation of their toxicity is necessary. Methods Aqueous solutions of ATE (10 mg/L) were submitted to oxidative treatments of chlorination ([NaClO] = 10 mg/L), ozonation ([O3] = 8 mg/L), photocatalysis ([TiO2] = 120 mg/L and UV‐C light) and photolysis (UV‐C light). The removal of ATE and formation of degradation products (DPs) were monitored by mass spectrometry. To assess acute cytotoxicity, DPs were submitted to colorimetric MTT assay using HepG2 cells. The Ecological Structure Activity Relationships (ECOSAR) software was applied to estimate the acute and chronic toxicity of identified DPs at different trophic levels. Results Photocatalysis was the treatment that demonstrated greater efficiency, removing 94% of the initial ATE. For the four tested treatments, 12 DPs were confirmed after 30 min. Moreover, some of the identified DPs were unpublished in the literature. Through high‐resolution mass spectrometry (HRMS), it was possible to elucidate the structure of the DPs. Solutions of DPs were not considered to be toxic to HepG2 cells. Only the DP with a molecular formula of C13H19NO3 (m/z 238.1438) could be considered detrimental to daphnid and green algae. Conclusions Low rates of organic matter removal and high rates of ATE degradation were obtained in the applied treatments after 30 min. Although the treated solutions were not toxic to HepG2 cells, one of the degradation products can be considered an environmental concern since it presents chronic toxicity to daphnid and green algae.

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“…On the contrary, the drying by heat treatment at 60 °C appears to favour a mesoporous structure. The mesoporous products are in the micrometers in size and show an easy tendency toward sedimentation when dispersed in aqueous suspensions [ 7 ]. Such a feature is very useful in catalysis production because an easy, recyclable process can be performed.…”

Section: Discussionmentioning

confidence: 99%

“…Titania (TiO 2 ) has attracted noticeable attention for numerous applications in various research areas including pigments, photo-catalysis, dye-sensitized solar cells, lithium ion batteries, sensor devices, protective coatings, sunscreen cosmetics and solar water splitting [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. The effectiveness of TiO 2 in practical applications relies upon its physical-chemical properties that depend on the synthesis of nano-sized titania particles.…”

Section: Introductionmentioning

confidence: 99%

Recyclable Aggregates of Mesoporous Titania Synthesized by Thermal Treatment of Amorphous or Peptized Precursors

Mascolo

Ring

2018

Materials

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Recyclable aggregates of mesoporous titania with different anatase–rutile ratios have been prepared by thermal treatments of either amorphous or peptized precursors. These last two have been obtained by hydrolysis of either Ti(OC2H5)4 or of Ti(OC2H5)4 in mixture with 5 mol % Zr(OC3H7)4 at room temperature in the presence of NH4OH as a catalyzing agent. The anatase–rutile ratio, the recyclable aggregates of the nano-sized particles, the mesoporosity, the surface area and the crystallinity of the resulting crystallized products of titania can be controlled by the synthesis parameters including: concentration of ammonia catalyst, stirring time and concentration of the peptizing HNO3, drying method of peptized precursors, calcination temperature, and finally the ramp rate up to the titania crystallization temperature. A broad range of synthesis parameters control the crystal sizes of titania particles produced. This allows catalyst preparation with very different crystal size, surface area, anatase to rutile crystal ratio and various mesoporous structures. Drying by lyophilization of precursors reduce the aggregation of the primary particles giving micro-/macroporous structures.

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Photocatalytic degradation of atenolol in aqueous suspension of new recyclable catalysts based on titanium dioxide

Cited by 24 publications

References 51 publications

Novel organic assisted Ag-ZnO photocatalyst for atenolol and acetaminophen photocatalytic degradation under visible radiation: performance and reaction mechanism

Novel organic assisted Ag-ZnO photocatalyst for atenolol and acetaminophen photocatalytic degradation under visible radiation: performance and reaction mechanism

Oxidative treatments for atenolol removal in water: Elucidation by mass spectrometry and toxicity evaluation of degradation products

Recyclable Aggregates of Mesoporous Titania Synthesized by Thermal Treatment of Amorphous or Peptized Precursors

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