Degradation of Antiviral Drug Favipiravir Using UV, UV/H₂O₂, and Photocatalysis with Co-Doped ZnS Quantum Dots: Operational Parameters, Kinetic Studies, and Toxicity Assessment

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: March 5, 2025

Antiviral drugs, in particular those used to treat COVID-19, have been categorized as emerging pollutants recent years due their persistent presence water/wastewater. They identified environmental matrices all over the world, proving that current treatment methods cannot eliminate them from In this study, degradation of favipiravir (FAV) and ecotoxicity changes different water were investigated using UV, UV/H2O2, UV/Co-doped ZnS quantum dots (QDs) photocatalytic processes. The effects initial FAV concentration, matrices, pH, H2O2 catalyst amount on rate evaluated. Initial concentrations (50, 100, 150 μg/L) a slight effect rate. matrix composition significantly reduced rates efficiencies for QDs processes following order: wastewater plant (WWTP) effluent > tap (TW) distilled (DW). pH (4.0, 5.0, 7.0, 9.0) had remarkable enhanced 86.3 98.1% with increasing 4.0 9.0 ionization degree UV process. maximum was obtained at 7.0 removal 93.9 100% UV/H2O2 processes, respectively. Transformation products determined toxicity algae increased 50 μg/L water. Growth inhibition 50, 15.1, 33.3, 36.3% 96 h, respectively, without any treatment. After 60 min process, growth decreased below 0.5% regardless concentration. Overall, process is effective degrading aqueous matrices; however, an step required remove natural organic matter actual matrices.

Language: Английский

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Three-dimensional biofilm electrode reactors (3D-BERs) for wastewater treatment

Bioresource Technology, Journal Year: 2021, Volume and Issue: 344, P. 126274 - 126274

Published: Nov. 2, 2021

Language: Английский

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PbO2 materials for electrochemical environmental engineering: A review on synthesis and applications

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 855, P. 158880 - 158880

Published: Sept. 18, 2022

Language: Английский

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Facile fabrication of amino-functionalized MIL-68(Al) metal–organic framework for effective adsorption of arsenate (As(V))

Scientific Reports, Journal Year: 2022, Volume and Issue: 12(1)

Published: July 13, 2022

Abstract An amino-functionalized MIL-68(Al) metal–organic framework (amino-MIL-68(Al) MOF) was synthesized by solvothermal method and then characterized FESEM, XRD, FTIR, EDX-mapping, BET-BJH techniques. In order to predict arsenate (As(V)) removal, a robust quadratic model (R 2 > 0.99, F -value = 2389.17 p value < 0.0001) developed the central composite design (CCD) genetic algorithm (GA) utilized optimize system response four independent variables. The results showed that As(V) adsorption on MOF affected solution pH, adsorbent dose, concentration reaction time, respectively. Predicted experimental removal efficiencies under optimal conditions were 99.45 99.87%, fitting of data is well described nonlinear form Langmuir isotherm pseudo-second-order kinetic. At optimum pH 3, maximum capacity 74.29 mg/g. Thermodynamic studies in temperature range 25 50 °C spontaneous endothermic process. reusability ten adsorption/regeneration cycles studied high this adsorbent. highest interventional effect inhibiting related phosphate anion. study amino-MIL-68(Al) can be used as an effective with surface area (> 1000 m /g) for As(V)-contaminated water.

Language: Английский

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Bi5+ doping improves the electrochemical properties of Ti/SnO2–Sb/PbO2 electrode and its electrocatalytic performance for phenol

Journal of Cleaner Production, Journal Year: 2022, Volume and Issue: 380, P. 135005 - 135005

Published: Nov. 2, 2022

Language: Английский

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