Co/La modified Ti/PbO2 anodes for chloramphenicol degradation: Catalytic performance and reaction mechanism

Hu, Xuyang; Zhang, Yinghao; Jiang, Wenqiang; Zhang, Xuan

doi:10.1016/j.chemosphere.2021.131568

Cited by 29 publications

(7 citation statements)

References 52 publications

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“…On the other hand, the (photo)electrochemical process proceeds through the one-electron oxidation of water to generate • OH, as shown in eq . Here, the most widely used electrode materials are boron-doped diamond (BDD) − or titanium oxide nanocrystals. ,,− On electrochemical systems such as BDD, • OH generation is in competition with other pathways to oxidize water, such as the four-electron process to generate O 2 . …”

Section: Introductionmentioning

confidence: 99%

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Real-Time Detection of Hydroxyl Radical Generated at Operating Electrodes via Redox-Active Adduct Formation Using Scanning Electrochemical Microscopy

et al. 2022

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The hydroxyl radical (•OH) is one of the most attractive reactive oxygen species due to its high oxidation power and its clean (photo)(electro)generation from water, leaving no residues and creating new prospects for efficient wastewater treatment and electrosynthesis. Unfortunately, in situ detection of •OH is challenging due to its short lifetime (few ns). Using lifetime-extending spin traps, such as 5,5-dimethyl-1-pyrroline N-oxide (DMPO) to generate the [DMPO–OH]• adduct in combination with electron spin resonance (ESR), allows unambiguous determination of its presence in solution. However, this method is cumbersome and lacks the necessary sensitivity and versatility to explore and quantify •OH generation dynamics at electrode surfaces in real time. Here, we identify that [DMPO–OH]• is redox-active with E 0 = 0.85 V vs Ag|AgCl and can be conveniently detected on Au and C ultramicroelectrodes. Using scanning electrochemical microscopy (SECM), a four-electrode technique capable of collecting the freshly generated [DMPO–OH]• from near the electrode surface, we detected its generation in real time from operating electrodes. We also generated images of [DMPO–OH]• production and estimated and compared its generation efficiency at various electrodes (boron-doped diamond, tin oxide, titanium foil, glassy carbon, platinum, and lead oxide). Density functional calculations, ESR measurements, and bulk calibration using the Fenton reaction helped us unambiguously identify [DMPO–OH]• as the source of redox activity. We hope these findings will encourage the rapid, inexpensive, and quantitative detection of •OH for conducting informed explorations of its role in mediated oxidation processes at electrode surfaces for energy, environmental, and synthetic applications.

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Section: Introductionmentioning

confidence: 99%

“…Here, the most widely used electrode materials are boron-doped diamond (BDD) 30 − 34 or titanium oxide nanocrystals. 10 , 28 , 35 − 37 On electrochemical systems such as BDD, • OH generation is in competition with other pathways to oxidize water, such as the four-electron process to generate O 2 . …”

Section: Introductionmentioning

confidence: 99%

Real-Time Detection of Hydroxyl Radical Generated at Operating Electrodes via Redox-Active Adduct Formation Using Scanning Electrochemical Microscopy

et al. 2022

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“…In recent years, the emergence of antibiotic resistance genes (ARGs) has become an important global health problem [1]. The number of deaths from antibiotic-resistant infections is estimated at 700,000 per year worldwide [2,3]. ARGs are ubiquitous and can be detected in river water, farm soil, sludge, vegetables and even the air [4].…”

Section: Introductionmentioning

confidence: 99%

“…(1) to investigate the effects of adding hyperthermophiles and biochar on the abundance of ARGs and MGEs in compost; (2) to investigate the effects of adding hyperthermophiles and biochar on the dynamics of microbial communities; (3) to determine the correlation between ARGs and potential host bacteria; and (4) to investigate the relative contributions of physicochemical properties, MGEs and bacterial communities to the changes in ARGs in compost. The research results of this study can be used to explore a more effective method to remove ARGs in the process of composting and improve the quality of composting products.…”

Section: Introductionmentioning

confidence: 99%

Biochar and Hyperthermophiles as Additives Accelerate the Removal of Antibiotic Resistance Genes and Mobile Genetic Elements during Composting

Fu,

Zhang,

Guo

et al. 2021

Materials

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Sewage treatment plants are known as repositories of antibiotic resistance genes (ARGs). Adding biochar and inoculating with exogenous microbial agents are common ways to improve the quality of compost. However, little is known about the effects of these exogenous additives on the fate of ARGs during composting and the related mechanisms. In this study, municipal sludge was taken as the research object to study the ARG-removal effects of four composting methods: ordinary compost (CT), compost with hyperthermophiles (HT), compost with hyperthermophiles and 2.0% biochar (HT2C) and compost with hyperthermophiles and 5.0% biochar (HT5C). Real-time quantitative PCR (qPCR) and 16S rRNA high-throughput sequencing were conducted to analyze the ARGs, MGEs and bacterial community. After composting, the abundance of ARGs in CT was reduced by 72.7%, while HT, HT2C and HT5C were reduced by 80.7%, 84.3% and 84.8%, respectively. Treatments with different proportions of biochar added (HT2C, HT5C) had no significant effect on the abundance of ARGs. Network analysis showed that Firmicutes and Nitrospirae were positively associated with most ARGs and may be potential hosts for them. In addition, redundancy analysis further showed that the class 1 integrase gene (intI1), pH and organic carbon had a greater effect on ARGs. Our findings suggested that the combination of hyperthermophiles and biochar during the composting process was an effective way to control ARGs and mobile genetic elements (MGEs), thus inhibiting the spread and diffusion of ARGs in the environment and improving the efficiency of treating human and animal diseases.

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“…This is mainly because acidic conditions inhibit the decomposition of • OH and oxygen evolution reaction, which leads to the acceleration of reaction rate. [30] In addition, as shown in Figure 5c, the initial pH also had no significant effect on norfloxacin degradation (100 % within 10 min). As shown in the inset of Figure 5c, with the increase of pH from 3 to 7, the kinetic constant of norfloxacin degradation increased from 0.494 to 1.010 min À 1 .…”

Section: Effect Of Different Phmentioning

confidence: 80%

Construction of a Zero‐gap Flow‐Through Microfluidic Reactor with Porous RuO₂‐IrO₂@Pt Anode for Electrocatalytic Oxidation of Antibiotics in Water

Zhu,

Wang,

et al. 2024

Chemistry An Asian Journal

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In this study, a zero‐gap flow‐through microfluidic reactor was constructed for the degradation of tetracycline and norfloxacin in water using a porous Ti/RuO2‐IrO2@Pt electrode as the anode and porous titanium plate as the cathode. The operation parameters included electrolyte type, electrolyte concentration, current density, initial concentration of pollutants and pH, were investigated. The degradation efficiency and energy consumption were calculated and compared with traditional electrolyzer. In the zero‐gap flow‐through microfluidic reactor, 100% of both tetracycline and norfloxacin can be decomposed in 15 min, and high mineralization rate were achieved under the optimized reaction condition. And the reaction was consistent with pseudo‐first‐order kinetics with k value of 0.492 cm‐1 and 1.010 cm‐1, for tetracycline and norfloxacin, respectively. In addition, the energy consumption was 28.33 kWh kg‐1 TC and 8.36 kWh kg‐1 NOR, for tetracycline and norfloxacin, respectively, which was much lower than that of traditional electrolyzer. The LC‐MS results showed that tetracycline underwent a series of demethylation, dehydration and deamination reactions, and the norfloxacin went through ring opening reaction, decarboxylation and hydroxylation reaction, and finally both produced CO2 and H2O.

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Co/La modified Ti/PbO2 anodes for chloramphenicol degradation: Catalytic performance and reaction mechanism

Cited by 29 publications

References 52 publications

Real-Time Detection of Hydroxyl Radical Generated at Operating Electrodes via Redox-Active Adduct Formation Using Scanning Electrochemical Microscopy

Real-Time Detection of Hydroxyl Radical Generated at Operating Electrodes via Redox-Active Adduct Formation Using Scanning Electrochemical Microscopy

Biochar and Hyperthermophiles as Additives Accelerate the Removal of Antibiotic Resistance Genes and Mobile Genetic Elements during Composting

Construction of a Zero‐gap Flow‐Through Microfluidic Reactor with Porous RuO₂‐IrO₂@Pt Anode for Electrocatalytic Oxidation of Antibiotics in Water

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Co/La modified Ti/PbO2 anodes for chloramphenicol degradation: Catalytic performance and reaction mechanism

Cited by 29 publications

References 52 publications

Real-Time Detection of Hydroxyl Radical Generated at Operating Electrodes via Redox-Active Adduct Formation Using Scanning Electrochemical Microscopy

Real-Time Detection of Hydroxyl Radical Generated at Operating Electrodes via Redox-Active Adduct Formation Using Scanning Electrochemical Microscopy

Biochar and Hyperthermophiles as Additives Accelerate the Removal of Antibiotic Resistance Genes and Mobile Genetic Elements during Composting

Construction of a Zero‐gap Flow‐Through Microfluidic Reactor with Porous RuO2‐IrO2@Pt Anode for Electrocatalytic Oxidation of Antibiotics in Water

Contact Info

Product

Resources

About

Construction of a Zero‐gap Flow‐Through Microfluidic Reactor with Porous RuO₂‐IrO₂@Pt Anode for Electrocatalytic Oxidation of Antibiotics in Water