Multidrug-resistant Enterobacter spp. in wastewater and surface water: Molecular characterization of β-lactam resistance and metal tolerance genes

Zagui, Guilherme Sgobbi; Moreira, Natália Columbaro; Santos, Danilo Vitorino dos; Paschoalato, Cristina Filomêna Pereira Rosa; Sierra, Jordi; Nadal, Martí; Domingo, José L.; Darini, Ana Lúcia da Costa; Andrade, Leonardo Neves

doi:10.1016/j.envres.2023.116443

Cited by 8 publications

(1 citation statement)

References 43 publications

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“…The photocatalytic performance of the obtained materials was investigated for the degradation of ciprofloxacin (CIP), a synthetic antibiotic used to treat respiratory, urinary, and skin infections in humans and animals, as a model organic pollutant. In the environment, CIP adversely affects the development and reproduction of several aquatic organisms and contributes to the proliferation of antibiotic resistant pathogens [32,33]. The novel insights into the effects of Ag and Fe photomodification on iso-type homojunction BiVO 4 presented herein pave the way to a broader application of iso-type homojunction BiVO 4 and contributes to the knowledge on BiVO 4 band structure engineering.…”

Section: Introductionmentioning

confidence: 79%

Enhancing the Photocatalytic Performance of BiVO4 for Micropollutant Degradation by Fe and Ag Photomodification

Popović,

Sharifi,

Kraljić Roković

et al. 2023

Processes

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Wider application of BiVO4 (BVO) for photocatalytic water treatment is primarily limited by its modest photocatalytic effectiveness, despite its appropriately narrow band gap for low-cost, sunlight-facilitated water treatment processes. In this study, we have photomodified an isotype BVO, consisting of a tetragonal zircon and monoclinic scheelite phase, with Fe (Fe@BVO) and Ag (Ag@BVO) ionic precursors under UV illumination in an aqueous ethanol solution in order to assess their effect on the opto-electronic properties and effectiveness for the removal of ciprofloxacin (CIP). Fe@BVO failed to demonstrate enhanced effectiveness over pristine BVO, whereas all Ag@BVO achieved improved CIP degradation, especially 1% Ag@BVO. At pH 4 and 6, 1% Ag@BVO demonstrated nearly 24% greater removal of CIP than BVO alone. Photomodification with Fe created surface oxygen vacancies, as confirmed by XPS and Mott–Schottky analysis, which facilitated improved electron mobility, although no distinct Fe-containing phase nor Fe-doping was detected. On the other hand, the introduction of mid-band gap states by oxygen vacancies decreased the reducing power of the photogenerated electrons as the flat band potentials were shifted to more positive values, thus likely negatively impacting superoxide formation. In contrast, Ag-photomodification (Ag@BVO) resulted in the formation of Ag2O/AgO and Ag nanoparticles on the surface of BVO, which, under illumination, generated hot electrons by surface plasmon resonance and enhanced the mobility of photogenerated electrons. Our research underscores the pivotal role of photogenerated electrons for CIP degradation by BiVO4-based materials and emphasizes the importance of appropriate band-edge engineering for optimizing contaminant degradation.

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Section: Introductionmentioning

confidence: 79%