Degradation of diclofenac via sequential reduction-oxidation by Ru/Fe modified biocathode dual-chamber bioelectrochemical system: Performance, pathways and degradation mechanisms

Bing, Qiu; Hu, Yongyou; Chao-yang, Tang; Chen, Yuancai; Cheng, Jianhua

doi:10.1016/j.chemosphere.2021.132881

Cited by 17 publications

(7 citation statements)

References 52 publications

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“…Diclofenac was not easily degraded by oxidation, due to its special molecular structure containing two chlorinated strong electron-withdrawing groups. Dechlorination and further mineralization are two key steps in diclofenac degradation; dechlorination can reduce the stability of the chemical structure of diclofenac, and oxidation could easily transform the reductive intermediates into small organic molecules [ 36 ]. The complete degradation of diclofenac achieved by the use of AO-UBERs in this study may be due to the fact that the two chlorinated strong electron-withdrawing groups are more inclined to efficient oxidative removal in the aerobic anode.…”

Section: Discussionmentioning

confidence: 99%

“…Qiu et al [ 37 ] reported diclofenac degradation efficiency of 75.6% achieved using a Ru/Fe modified anode in a microbial fuel cell. Elsewhere, it was reported that the mineralization rate of diclofenac was only 69.6% in a Ru/Fe biocathode dual-chamber BES [ 36 ]. In contrast, the coupled system with aerobic anodic and anaerobic cathodic chambers used in our experiments could completely remove diclofenac at 1.2 V voltage.…”

Section: Discussionmentioning

confidence: 99%

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Impact of Voltage Application on Degradation of Biorefractory Pharmaceuticals in an Anaerobic–Aerobic Coupled Upflow Bioelectrochemical Reactor

Zhang

Ailijiang

et al. 2022

IJERPH

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Diclofenac, ibuprofen, and carbamazepine are frequently detected in the environment, where they pose a threat to organisms and ecosystems. We developed anaerobic–aerobic coupled upflow bioelectrochemical reactors (AO-UBERs) with different voltages, hydraulic retention times (HRTs), and types of electrode conversion, and evaluated the ability of the AO-UBERs to remove the three pharmaceuticals. This study showed that when a voltage of 0.6 V was applied, the removal rate of ibuprofen was slightly higher in the system with aerobic cathodic and anaerobic anodic chambers (60.2 ± 11.0%) with HRT of 48 h than in the control systems, and the removal efficiency reached stability faster. Diclofenac removal was 100% in the 1.2 V system with aerobic anodic and anaerobic cathodic chambers, which was greater than in the control system (65.5 ± 2.0%). The contribution of the aerobic cathodic–anodic chambers to the removal of ibuprofen and diclofenac was higher than that of the anaerobic cathodic–anodic chambers. Electrical stimulation barely facilitated the attenuation of carbamazepine. Furthermore, biodegradation-related species (Methyloversatilis, SM1A02, Sporomusa, and Terrimicrobium) were enriched in the AO-UBERs, enhancing pharmaceutical removal. The current study sheds fresh light on the interactions of bacterial populations with the removal of pharmaceuticals in a coupled system.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Impact of Voltage Application on Degradation of Biorefractory Pharmaceuticals in an Anaerobic–Aerobic Coupled Upflow Bioelectrochemical Reactor

Zhang

Ailijiang

et al. 2022

IJERPH

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“…In the recent past, various research strategies/technologies have been adopted for the remediation of industrial wastewater and dye-contaminated water bodies, including plasma-based advanced oxidation process [6], ozonation [7], membrane filtration [8], bioelectrochemical system [9], heterogeneous Fenton catalysts [10], ion exchange removal [11], adsorption, and electrocoagulation [12]. Among these, the photocatalysis process mediated by metal oxide semiconductors is an environmentally safe process that simulates the natural photosynthesis process to speed up the chemical reactions requiring light [13].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Methyl Green Dye Mediated by Pure and Mn-Doped Zinc Oxide Nanoparticles under Solar Light Irradiation

Akram

Fatima

Almohaimeed

et al. 2023

Adsorption Science & Technology

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Herein this study, pure and manganese- (Mn-) doped ZnO (2 wt. %) nanoparticles have been synthesized using the chemical precipitation method and characterized for the photodegradation of methyl green (MG) pollutant dye under natural sunlight. The structural analysis via XRD patterns has revealed that both intrinsic and Mn-doped ZnO (2 wt. %) samples have hexagonal wurtzite structures with appropriate phase purity, clearly indicating the absence of any external impurity. The incorporation of Mn in the host ZnO lattice has decreased the crystallite size (21.10 → 18.76 nm), and nanoparticle-type surface features with sizes in the 50–100 nm range have been observed through FESEM-based surface morphological studies. Both aforementioned observations have merit in providing more active area and a high surface area to volume ratio for photocatalytic reaction. The investigation of photophysical properties indicates that in Mn-doped ZnO nanoparticles, the absorption peak is blue-shifted by 5 nm (365 → 360 nm), due to the widening of the bandgap. The degradation kinetics of MG dye follow the pseudo-second-order kinetics, and the degradation efficiency has been observed to be 62.78% mediated by pure ZnO and 66.44% by Mn-doped ZnO (2 wt. %) photocatalyst under 60 minutes of sunlight irradiation. Specifically, the rate of photocatalytic reaction (K) ~0.01792 min-1 and R 2 ~0.97992 has been achieved for pure ZnO, whereas slightly higher (K) ~0.02072 min-1 and R 2 ~0.97299 have been observed for Mn-doped ZnO, respectively. Conclusively, the synergistic interactions with multiple charge transfer pathways, improvement of e−/h+ pair charge separation, improved surface area, and efficient generation of hydroxyl radicals are supposed to be responsible for the highly efficient photocatalytic activity of the Mn–doped ZnO photocatalyst for MG dye.

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“…23 Dechlorination of DCF to 2anilinophenylacetic acid (2-APA) was observed in a microbial fuel cell with high abundances of Sulf urvermis, Lentimicrobiaceae, Dethiosulfatibacter, and Bacteroidales. 24 In either case, the transformation mechanism(s) and the explicit roles of key microorganism(s) in these anaerobic processes have not been elucidated.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Negligible transformation of DCF to a hydrogen atom eliminated product was detected in anaerobic cultures inoculated with the effluent from a municipal wastewater treatment facility . Dechlorination of DCF to 2-anilinophenylacetic acid (2-APA) was observed in a microbial fuel cell with high abundances of Sulfurvermis, Lentimicrobiaceae, Dethiosulfatibacter , and Bacteroidales . In either case, the transformation mechanism(s) and the explicit roles of key microorganism(s) in these anaerobic processes have not been elucidated.…”

Section: Introductionmentioning

confidence: 99%

Organohalide Respiration with Diclofenac by Dehalogenimonas

Yang

Wang

et al. 2022

Environ. Sci. Technol.

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Diclofenac (DCF) is a pharmaceutically active contaminant frequently found in aquatic ecosystems. The transformation pathways and microbiology involved in the biodegradation of DCF, particularly under anoxic conditions, remain poorly understood. Here, we demonstrated microbially mediated reductive dechlorination of DCF in anaerobic enrichment culture derived from contaminated river sediment. Over 90% of the initial 76.7 ± 3.6 μM DCF was dechlorinated at a maximum rate of 1.8 ± 0.3 μM day −1 during a 160 days' incubation. Mass spectrometric analysis confirmed that 2-(2-((2-chlorophenyl)amino)phenyl)acetic acid (2-CPA) and 2anilinophenylacetic acid (2-APA) were formed as the monochlorinated and nonchlorinated DCF transformation products, respectively. A survey of microbial composition and Sanger sequencing revealed the enrichment and dominance of a new Dehalogenimonas population, designated as Dehalogenimonas sp. strain DCF, in the DCFdechlorinating community. Following the stoichiometric conversion of DCF to 2-CPA (76.0 ± 2.1 μM) and 2-APA (3.7 ± 0.8 μM), strain DCF cell densities increased by 24.4 ± 4.4-fold with a growth yield of 9.0 ± 0.1 × 10 8 cells per μmol chloride released. Our findings expand the metabolic capability in the genus Dehalogenimonas and highlight the relevant roles of organohalide-respiring bacteria for the natural attenuation of halogenated contaminants of emerging concerns (e.g., DCF).

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Degradation of diclofenac via sequential reduction-oxidation by Ru/Fe modified biocathode dual-chamber bioelectrochemical system: Performance, pathways and degradation mechanisms

Cited by 17 publications

References 52 publications

Impact of Voltage Application on Degradation of Biorefractory Pharmaceuticals in an Anaerobic–Aerobic Coupled Upflow Bioelectrochemical Reactor

Impact of Voltage Application on Degradation of Biorefractory Pharmaceuticals in an Anaerobic–Aerobic Coupled Upflow Bioelectrochemical Reactor

Photocatalytic Degradation of Methyl Green Dye Mediated by Pure and Mn-Doped Zinc Oxide Nanoparticles under Solar Light Irradiation

Organohalide Respiration with Diclofenac by Dehalogenimonas

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