Photolytic and photocatalytic removal of a mixture of four veterinary antibiotics

Zambrano, Johanna; García‐Encina, Pedro A.; Jiménez, J.; López-Serna, Rebeca; Mata, Rubén Irusta

doi:10.1016/j.jwpe.2022.102841

Cited by 31 publications

(9 citation statements)

References 53 publications

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“…Since there is a limited number of EE/O studies available for SMX degradation using TiO 2 -based photocatalysts, the EE/O values obtained are compared with the ones for other organic pollutants in Table 2. The EE/O values estimated in the present study for SMX degradation are similar to the ones reported by Zambrano et al [60] using UV/TiO 2 . In addition, the EE/O value for SMX mineralization in the UV/TZSM1450 system was equal to 4156 kWh m −3 order −1 .…”

Section: Electrical Energy Estimationsupporting

confidence: 91%

TiO2/Zeolite Composites for SMX Degradation under UV Irradiation

Mergenbayeva,

Abitayev,

Batyrbayeva

et al. 2024

Catalysts

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Sulfamethoxazole (SMX) is a common antibiotic that is considered an emerging pollutant of water bodies, as it is toxic for various aquatic species. TiO2-based photocatalysis is a promising method for SMX degradation in water. In this work, TiO2/zeolite (Z-45 loaded with TiO2 labeled as TZ and ZSM-5 loaded with TiO2 labeled as TZSM) composites were prepared by mechanical mixing and liquid impregnation methods, and the photocatalytic performance of these composites (200 mg·L−1) was investigated toward the degradation of SMX (30 mg·L−1) in water under UV light (365 nm). The pseudo-first-order reaction rate constant of the TZSM1450 composite was 0.501 min−1, which was 2.08 times higher than that of TiO2 (k = 0.241 min−1). Complete SMX degradation was observed in 10 min using the UV/TZSM1450 system. The mineralization ability in terms of total organic carbon (TOC) removal was also assessed for all of the prepared composites. The results showed that 65% and 67% of SMX could be mineralized within 120 min of photocatalytic reaction by TZSM2600 and TZSM1450, respectively. The presence of and anions inhibited the degradation of SMX, while the presence of had almost no effect on the degradation efficiency of the UV/TZSM1450 system. The electrical energy per order estimated for the prepared composites was in the range of 68.53–946.48 kWh m−3 order−1. The results obtained revealed that the TZSM1450 composite shows promising potential as a photocatalyst for both the degradation and mineralization of SMX.

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Section: Electrical Energy Estimationsupporting

confidence: 91%

TiO2/Zeolite Composites for SMX Degradation under UV Irradiation

Mergenbayeva,

Abitayev,

Batyrbayeva

et al. 2024

Catalysts

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“…When the concentration of the contaminant is below 1, a pseudo-first-order model can be applied (Eq. 3 ) 37 . …”

Section: Resultsmentioning

confidence: 99%

Fabrication of new composite NCuTiO2/CQD for photocatalytic degradation of ciprofloxacin and pharmaceutical wastewater treatment: degradation pathway, toxicity assessment

Noroozi,

Gholami,

Oskoei

et al. 2023

Sci Rep

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In this research, the photocatalytic degradation of CIP from aqueous solutions using CQD decorated on N-Cu co-doped titania (NCuTCQD) was made during two synthesis steps by sol–gel and hydrothermal methods. The fabricated catalysts were analyzed using various techniques, including XRD, FT-IR, BET, FESEM, EDX, and DRS. The results showed that N and Cu atoms were doped on TiO2 and CQD was well deposited on NCuT. The investigation of effective operational parameters demonstrated that the complete removal of ciprofloxacin (CIP: 20 mg/L) could be achieved at pH 7.0, NCuTCQD4wt%: 0.8 g/L, and light intensity: 100 mW/cm2 over 60 min reaction time. The O2•– and OH˙ radicals were identified as the primary reactive species during the decontamination process. The synthesized photocatalyst could be recycled after six consecutive cycles of CIP decomposition with an insignificant decrease in performance. Pharmaceutical wastewater was treated through the optimum degradation conditions which showed the photocatalytic degradation eliminated 89% of COD and 75% of TOC within 180 min. In the effluent toxicity evaluation, the EC50 values for treated and untreated pharmaceutical wastewater increased from 62.50% to 140%, indicating that the NCuTCQD4wt%/Vis system can effectively reduce the toxic effects of pharmaceutical wastewater on aquatic environments.

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“…Photocatalytic degradation is an emerging technology that uses light as an energy source to activate chemical reactions and nanoscale catalysts . High mineralization percentages can be obtained using a photocatalytic process. ,, Among pharmaceutical compounds, antibiotics are some of the main contributors to severe environmental contamination because of their high consumption rates in both human and veterinary medicine. Pharmaceutical compound degradation using semiconductor photocatalysts is a viable option because of advantages such as low cost, energy savings, environmental friendliness, simplicity, and mild reaction conditions.…”

Section: Introductionmentioning

confidence: 99%

Effective Visible-Light-Driven Photocatalytic Degradation of Harmful Antibiotics Using Reduced Graphene Oxide-Zinc Sulfide-Copper Sulfide Nanocomposites as a Catalyst

Mahalingam,

Neelan,

Bakthavatchalam

et al. 2023

ACS Omega

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In recent decades, antibiotics have been found in aquatic environments, raising severe concerns. In this study, a unique reduced graphene oxide-zinc sulfide-copper sulfide (rGO-ZnS-CuS) nanocomposite (NC) prepared by using a straightforward surfactant-free in situ microwave method was used for antibiotic degradation via photocatalysis. The structural and morphological characteristics of the produced catalysts were characterized using various techniques, confirming the successful development of nanocomposite structures of better quality than that of the pure samples. The photocatalytic degradation of antibiotics containing ofloxacin was also investigated. The results suggest that the rGO-ZCS NC outperformed the other composites in terms of photocatalytic activity toward ofloxacin degradation. Superoxide and hydroxyl radicals were the main active species during the degradation process. According to our results, the catalytic activity of rGO-ZCS NC is much better than that of the other composites.

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Photolytic and photocatalytic removal of a mixture of four veterinary antibiotics

Cited by 31 publications

References 53 publications

TiO2/Zeolite Composites for SMX Degradation under UV Irradiation

TiO2/Zeolite Composites for SMX Degradation under UV Irradiation

Fabrication of new composite NCuTiO2/CQD for photocatalytic degradation of ciprofloxacin and pharmaceutical wastewater treatment: degradation pathway, toxicity assessment

Effective Visible-Light-Driven Photocatalytic Degradation of Harmful Antibiotics Using Reduced Graphene Oxide-Zinc Sulfide-Copper Sulfide Nanocomposites as a Catalyst

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