Performance of Nb/BDD material for the electrochemical advanced oxidation of prednisone in different water matrix

Welter, Júlia Bitencourt; Silva, Salatiel Wohlmuth da; Schneider, Daniela Eduarda; Rodrigues, Marco Antônio Siqueira; Ferreira, Jane Zoppas

doi:10.1016/j.chemosphere.2020.126062

Cited by 26 publications

(7 citation statements)

References 36 publications

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“…Results were discussed and compared to the most recently reported data obtained employing different advanced degradation techniques [30][31][32][33][34][35][36].…”

Section: Resultsmentioning

confidence: 99%

“…The observed kinetic degradation constants (k deg ) calculated for each GC are shown in Table 3. These results are particularly informative for evaluating the validity of TiO 2 remediation in real matrices under UV-A or solar light compared with other advanced oxidation processes, such as ZnO [36] WO 3 and ZrO 2 [34] semiconductors, ozone [32], gamma irradiation [35], UV/chlorine process [31], photo-Fenton [30] and electrochemical oxidation process [33]. For example, ZnO has a low stability in aqueous solutions at natural pH [36]; WO 3 and ZrO 2 require strong acidic conditions to work [34].…”

Section: Kinetic Degradation In Actual Samplesmentioning

confidence: 99%

“…Other AOPs, such radiolysis [35] or photo-Fenton [30], need the addition of a sacrificial oxidizing agent (H 2 O 2 , S 2 O 8 2− , etc.) to improve their photocatalytic performance; ozonization [32] and electrochemical oxidation process [33] require acidic and alkaline solutions, respectively, and UV/chlorine process [31] occurs under UV-C irradiation.…”

Section: Kinetic Degradation In Actual Samplesmentioning

confidence: 99%

“…Finally, the sunlight TiO 2 -photocatalytic efficiency for GCs removal was highlighted and compared with other advanced oxidation processes recently proposed [30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

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TiO2-Photocatalyzed Water Depollution, a Strong, yet Selective Depollution Method: New Evidence from the Solar Light Induced Degradation of Glucocorticoids in Freshwaters

et al. 2021

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The photodegradation of the most prescribed glucocorticoids (GCs) was studied under relevant environmental conditions in the presence of suspended TiO2. The considered drugs included cortisone (CORT), hydrocortisone (HCORT), betamethasone (BETA), dexamethasone (DEXA), prednisone (PRED), prednisolone (PREDLO), and triamcinolone (TRIAM). The experiments were carried out at concentrations (50 µg L−1) close to the real ones in freshwater samples (tap and river) under simulated and natural sunlight, and their decomposition took place very efficiently under natural sunlight. The reactions were monitored by high-pressure liquid chromatography coupled to electrospray ionization tandem mass spectrometry (HPLC-ESI-MS/MS). According to a pseudo-first-order decay, all drugs underwent degradation within 15 min, following different paths with respect to the direct photolysis. The observed kinetic constants, slightly lower in river than in tap water, varied from 0.29 to 0.61 min−1 with modest differences among GCs in the same matrix. Among main matrix macro-constituents, humic acids (HAs) were the most interfering species involved in GCs degradation. The photogenerated primary products were identified by HPLC-ESI-MS/MS, allowing to elucidate the general photochemical path of GCs. Finally, a comparison with literature data obtained using different advanced oxidation processes (AOPs) highlights the treatment efficiency with TiO2/solar light for removing such persistent aquatic contaminants.

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“…Results were discussed and compared to the most recently reported data obtained employing different advanced degradation techniques [30][31][32][33][34][35][36].…”

Section: Resultsmentioning

confidence: 99%

Section: Kinetic Degradation In Actual Samplesmentioning

confidence: 99%

Section: Kinetic Degradation In Actual Samplesmentioning

confidence: 99%

“…Finally, the sunlight TiO 2 -photocatalytic efficiency for GCs removal was highlighted and compared with other advanced oxidation processes recently proposed [30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

TiO2-Photocatalyzed Water Depollution, a Strong, yet Selective Depollution Method: New Evidence from the Solar Light Induced Degradation of Glucocorticoids in Freshwaters

et al. 2021

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“…15,16 Recently, intensive attentions have been paid on the preparation of highly efficient electrodes by coating multi-layers of metal oxides or others and/or with doping elemental metals. 17,18 Xia et al 19 developed an indium-doped PbO 2 electrode to enhance the electrochemical treatment of aspirin wastewater; results indicated that COD removal reached 76% after 2.5 h electrolysis, and energy saving could reach 30.6% after electrode modification. Another feasible way to advance the electro-oxidation process is to optimize reactor structures to enhance mass transfer.…”

mentioning

confidence: 99%

Stepping Control of Electrochemical Process for Simultaneous Removal of COD and Ammonia with High Efficiency and Energy Saving

Yao¹,

Chen²,

Ye³

et al. 2021

J. Electrochem. Soc.

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To maximize pollutant removal efficiency with minimal energy consumption, electrochemical process for wastewater treatment should be further conducted. The stepping control of electrochemical process for simultaneous removal of chemical oxygen demand (COD) and ammonia from simulated and actual wastewater with high efficiency and energy saving was studied in this work. Flow rate, initial pH value, Cl− concentration, and applied current density were determined to be the influencing factors for the degradation performance, and analyses of pollutant removal efficiency further revealed that applied current density was the significant parameter in this case. A stepping control system by operating applied current density timely based on the degradation pathway of organic matter and variation of anodic working potential was then proposed; results indicated that 90.9% COD and 100% ammonia could be removed, and energy consumption of 7.6 kWh m−3 was calculated, which was substantially lower than that of the traditional electro-oxidation system (11.7 kWh m−3). Additionally, the developed stepping control system was validated by treating an actual pharmaceutical wastewater, results for which showed that removal efficiencies of 81.7% and 100% were achieved for COD and ammonia, respectively, and energy saving could be up to 37.2%.

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Study on the preparation, characterization, and electrocatalytic performance of Gd‐doped PbO₂ electrodes

et al. 2021

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In this work, Gd-doped PbO 2 electrodes were prepared by electrodeposition procedure. In the accelerated life test, the service life of Gd-doped PbO 2 electrodes are more stable and durable. Scanning electron microscope and x-ray diffraction tests reveal that Gd-doped PbO 2 electrodes have more compact structure and finer grain size. Electrochemical measurements and fluorescence experiments show that Gd-doped PbO 2 electrodes have higher oxygen evolution overpotential, a larger electrochemically active surface area, and stronger ability to generate hydroxyl radicals. The electrocatalytic performance of the Gd-doped PbO 2 electrode for the electrochemical degradation of thiamethoxam was studied. The degradation process accorded with pseudofirst-order kinetics, with higher thiamethoxam and total organic carbon removal capabilities, as well as higher mineralization current efficiency and lower energy consumption. In the degradation process, it has favourable reusability. The experimental results demonstrate that Gd-doped PbO 2 electrodes have an excellent treatment effect and a wider application prospect in the field of pollutant degradation.

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Performance of Nb/BDD material for the electrochemical advanced oxidation of prednisone in different water matrix

Cited by 26 publications

References 36 publications

TiO2-Photocatalyzed Water Depollution, a Strong, yet Selective Depollution Method: New Evidence from the Solar Light Induced Degradation of Glucocorticoids in Freshwaters

TiO2-Photocatalyzed Water Depollution, a Strong, yet Selective Depollution Method: New Evidence from the Solar Light Induced Degradation of Glucocorticoids in Freshwaters

Stepping Control of Electrochemical Process for Simultaneous Removal of COD and Ammonia with High Efficiency and Energy Saving

Study on the preparation, characterization, and electrocatalytic performance of Gd‐doped PbO₂ electrodes

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Performance of Nb/BDD material for the electrochemical advanced oxidation of prednisone in different water matrix

Cited by 26 publications

References 36 publications

TiO2-Photocatalyzed Water Depollution, a Strong, yet Selective Depollution Method: New Evidence from the Solar Light Induced Degradation of Glucocorticoids in Freshwaters

TiO2-Photocatalyzed Water Depollution, a Strong, yet Selective Depollution Method: New Evidence from the Solar Light Induced Degradation of Glucocorticoids in Freshwaters

Stepping Control of Electrochemical Process for Simultaneous Removal of COD and Ammonia with High Efficiency and Energy Saving

Study on the preparation, characterization, and electrocatalytic performance of Gd‐doped PbO2 electrodes

Contact Info

Product

Resources

About

Study on the preparation, characterization, and electrocatalytic performance of Gd‐doped PbO₂ electrodes