In-situ degradation of Amphotericin B in a microbial electrochemical cell containing wastewater

Chang, Changsomba; Gupta, Pratima

doi:10.1016/j.chemosphere.2022.136726

Cited by 9 publications

(10 citation statements)

References 46 publications

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“…The lignin samples were subjected to depolymerization based on the concentration of H 2 O 2 produced in the five MPPC setups. Even though H 2 O 2 can be employed for the breakdown of recalcitrant compounds, it is reported that induction of the Fenton process in the catholyte greatly enhances the breakdown process . The extremely oxidative hydroxyl radical ( • OH) created by the electro-Fenton process’s reaction of H 2 O 2 with Fe 2+ within a relatively strong acidic environment can quickly aid in the hydroxyl radical generation.…”

Section: Resultsmentioning

confidence: 99%

“…Five MPPC setups were constructed to investigate the depolymerization of different concentrations of extracted lignin, i.e., 0.2, 0.4, 0.6, 0.8, and 1%, via a microbial electro-Fenton process. For the microbial electro-Fenton process, a catalyst with a 0.1 M iron concentration was used in the catholyte of all MPPCs . The MPPC setups were operated for a few days without lignin to observe the concentration of H 2 O 2 production as the production efficiency of H 2 O 2 varies due to the utilization of wastewater as anodic feed in the anode chamber, and different lignin concentrations were added to the catholyte of the MPPCs based on the concentration of H 2 O 2 produced in all MPPCs.…”

Section: Methodsmentioning

confidence: 99%

“…For the microbial electro-Fenton process, a catalyst with a 0.1 M iron concentration was used in the catholyte of all MPPCs. 15 The MPPC setups were operated for a few days without lignin to observe the concentration of H 2 O 2 production as the production efficiency of The open cell voltage of all the MPPCs was measured by digital multi-meter Mastech DT830D every day. The Ohm's law formulas V = IR, I = V/ R, and R = V/I were applied to calculate the current by applying a resistance load across the MPPCs using a variable resistance box (100 kΩ−100 Ω).…”

Section: H O Fe(ii) Fe(iii) Oh Oh 2 2 + + • +mentioning

confidence: 99%

“…The wastewater contains a diverse array of microbial species, and it is widely accepted that different bacteria play distinct roles in the generation of electricity and the production of H be employed for the breakdown of recalcitrant compounds, it is reported that induction of the Fenton process in the catholyte greatly enhances the breakdown process. 15 The extremely oxidative hydroxyl radical ( • OH) created by the electro-Fenton process's reaction of H 2 O 2 with Fe 2+ within a relatively strong acidic environment can quickly aid in the hydroxyl radical generation. Generally, traditional Fenton reactions consist primarily of the oxidation of Fe 2+ to Fe 3+ along with the creation of • OH, which aids in the depolymerization process, and the reduction of Fe 3+ to Fe 2+ is a substantially slower process than that of the oxidation of Fe 2+ to Fe 3+ , which often disrupts the effective cycling of Fe 3+ and Fe 2+ and results in Fe 3+ build-up in solution.…”

Section: H O Fe(ii) Fe(iii) Oh Oh 2 2 + + • +mentioning

confidence: 99%

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Exploring the Oxidative Effects of the Microbial Electro-Fenton Process on the Depolymerization of Lignin Extracted from Rice Straw in a Bio-Electrochemical System Coupled with Wastewater Treatment

Chang

Gupta

2023

Biomacromolecules

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Lignin is a potential renewable feedstock to produce value-added compounds, but the overwhelming bulk of it is either burned for energy or discarded as waste. This paper addressed two critical issues: waste-to-value generation and management by demonstrating the in situ depolymerization of lignin extracted from waste rice straw utilizing the microbial electro-Fenton process in a microbial peroxide-producing cell (MPPC), a type of bio-electrochemical cell, for value addition while synchronously treating wastewater. The MPPC electrochemical voltage yields of 0.171 ± 0.05–0.497 ± 0.2 V produced 9 ± 0.43–34 ± 0.11 mM of H2O2, which was utilized to depolymerize lignin at various concentrations. Interestingly, a direct correlation was observed between lignin depolymerization and H2O2 concentration, while Fourier-transform infrared spectroscopy data revealed a constant disruption of the lignin structure accurately in the wavenumber region of 1000–1750 cm–1 irrespective of the H2O2 concentration. Carboxylic acid derivatives, benzopyran, hexanoic acid, and other valuable compounds were detected in the LC QTOF MS data from the depolymerized lignin mixture. Remarkably, SEM analysis demonstrated morphological changes in depolymerized lignin induced by the oxidative effects of hydroxyl radicals. Biochemical oxygen demand and chemical oxygen demand removal was 60 ± 3–85 ± 1% in anodic wastewater treatment. This research provides a sustainable and efficient technique for lignin valorization and wastewater treatment.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: H O Fe(ii) Fe(iii) Oh Oh 2 2 + + • +mentioning

confidence: 99%

Section: H O Fe(ii) Fe(iii) Oh Oh 2 2 + + • +mentioning

confidence: 99%

See 2 more Smart Citations

Exploring the Oxidative Effects of the Microbial Electro-Fenton Process on the Depolymerization of Lignin Extracted from Rice Straw in a Bio-Electrochemical System Coupled with Wastewater Treatment

Chang

Gupta

2023

Biomacromolecules

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“…According to the World Health Organization report for 2015-2016, amoxicillin is one of the most used antibiotics in the world [22] and, therefore, is often detected in wastewater [23,24]. Amphotericin B is a common anti-fungal agent that has been used for more than half a century [25][26][27], traces of which are also often found in the environment [28]. Several microorganisms, such as Aspergillus terreus, were reported to develop resistance to amphotericin B [29], which requires its removal from wastewater.…”

Section: Introductionmentioning

confidence: 99%

Efficient and Reusable Sorbents Based on Nanostructured BN Coatings for Water Treatment from Antibiotics

Kotyakova

Antipina

Сорокин

et al. 2022

IJMS

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Increasing contamination of wastewater with antibiotics used in agriculture, animal husbandry, and medicine is a serious problem for all living things. To address this important issue, we have developed an efficient platform based on a high specific surface area hexagonal boron nitride (BN) coating formed by numerous nanopetals and nanoneedles. The maximum sorption capacity of 1 × 1 cm2 BN coatings is 502.78 µg/g (tetracycline, TET), 315.75 µg/g (ciprofloxacin, CIP), 400.17 µg/g (amoxicillin, AMOX), and 269.7 µg/g (amphotericin B, AMP), which exceeds the sorption capacity of many known materials. Unlike nanoparticles, BN-coated Si wafers are easy to place in and remove from antibiotic-contaminated aqueous solutions, and are easy to clean. When reusing the adsorbents, 100% efficiency was observed at the same time intervals as in the first cleaning cycle: 7 days (TET) and 14 days (CIP, AMOX, AMP) at 10 µg/mL, 14 days (TET, CIP, and AMOX) and 28 days (AMP) at 50 µg/mL, and 14 days (TET) and 28 days (CIP, AMOX and AMP) at 100 µg/mL. The results obtained showed that TET and CIP are best adsorbed on the surface of BN, so TET was chosen as an example for further theoretical modeling of the sorption process. It was found that adsorption is the main mechanism, and this process is spontaneous and endothermic. This highlights the importance of a high specific surface area for the efficient removal of antibiotics from aqueous solutions.

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Valorization of lignin to obtain platform chemicals via bio‐electrochemical systems: batch and fed‐batch mode analysis

Chang

Gupta

2023

J of Chemical Tech & Biotech

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BACKGROUND: There is tremendous potential for reusing lignin, which is generally discarded as waste. This research analyses the batch and fed-batch mode of the microbial peroxide-producing cell (MPPC), a type of bio-electrochemical cell that produces H 2 O 2 , a potent green oxidant utilized in the oxidation of Kraft lignin to produce platform chemicals with simultaneous wastewater treatment.RESULTS: The batch mode MPPC had a total shelf life of 10 days, with a peak phase of 5 days and maximum H 2 O 2 of 9.7 ± 0.06 mmol L −1 , and voltage of 164 ± 0.021 mV. The intermittent nutrition feeding strategy of fed-batch MPPCs aided microbe metabolic reactions, extending the system's lifespan to 21 days with a maximum voltage of 294 ± 0.01 to 525 ± 0.008 mV and H 2 O 2 of 14.14 ± 0.12 to 32.96 ± 1.35 mmol L −1 , respectively. This offered more exposure time for lignin hydroxyl radical oxidation by H 2 O 2 , with enhanced depolymerization of 37-80% of high lignin concentration in repeated cycles compared to batch mode, which accomplished only 53.46%. Fourier transform infrared spectroscopy confirmed the structural changes in lignin of all systems, displaying loss and disorientation of major functional groups with greater intensity in fed batch-operated MPPCs. Platform chemicals with high commercial value, including guaiacol, ferulic acid, vanillin, and others, were identified using liquid chromatography-mass spectrometry. In terms of wastewater treatment, biochemical oxygen demand and chemical oxygen demand removal efficiency ranged from 59% to 83%, with fed-batch being the most efficient.CONCLUSION: This research suggests that fed-batch mode MPPC is significantly more productive than batch mode MPPC for lignin valorization to produce platform chemicals, making it more sustainable, economical, and environmentally friendly.

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In-situ degradation of Amphotericin B in a microbial electrochemical cell containing wastewater

Cited by 9 publications

References 46 publications

Exploring the Oxidative Effects of the Microbial Electro-Fenton Process on the Depolymerization of Lignin Extracted from Rice Straw in a Bio-Electrochemical System Coupled with Wastewater Treatment

Exploring the Oxidative Effects of the Microbial Electro-Fenton Process on the Depolymerization of Lignin Extracted from Rice Straw in a Bio-Electrochemical System Coupled with Wastewater Treatment

Efficient and Reusable Sorbents Based on Nanostructured BN Coatings for Water Treatment from Antibiotics

Valorization of lignin to obtain platform chemicals via bio‐electrochemical systems: batch and fed‐batch mode analysis

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