Effective and Nonprecious Cathode Catalysts for Oxygen Reduction Reaction in Microbial Fuel Cells

Chandrasekhar, K.

doi:10.1016/b978-0-444-64052-9.00019-4

Cited by 20 publications

(11 citation statements)

References 101 publications

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“…Its recovery, however, is the main disadvantage, as PAC adsorption usually involves a filtration or a coagulation-flocculation-decantation step. Both methods of recovery lead to higher costs (Chandrasekhar 2019).…”

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confidence: 99%

Antibiotics removal from aquatic environments: adsorption of enrofloxacin, trimethoprim, sulfadiazine, and amoxicillin on vegetal powdered activated carbon

Berges

Moles

Ormad

et al. 2020

Environ Sci Pollut Res

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This study addresses the growing concern about the high levels of antibiotics in water, outlining an alternative for their removal. The adsorption of four representative antibiotics from commonly used families (fluoroquinolones, β-lactams, trimethoprim and sulfonamides) was performed over vegetal powdered activated carbon. The evolution of the adsorption was studied during 60 min for different initial antibiotic concentrations, not only individually but also simultaneously to determine competitive adsorption. Moreover, this research studied the adsorption isotherms and kinetics of the process, as well as the pH influence, FTIR of the Activated Carbon before and after adsorption was carried out. Trimethoprim and sulfadiazine showed more affinity for the adsorbent than amoxicillin and enrofloxacin. This trend might be attributed to their structure, capable of stablishing stronger π-π interactions with the adsorbent, which showed high affinity for the active sites of the adsorbent via FTIR. In addition, the sorption isotherms of the substances tested followed a Langmuir type isotherm, except for amoxicillin which presented similar fittings to both Langmuir and Freundlich isotherms. The antibiotics followed pseudo-second order kinetics.Sulfadiazine and amoxicillin gave better performances in acidic conditions. By contrast, the sorption of trimethoprim was favored in basic environments. Variations of pH had a negligible effect on the removal of enrofloxacin.

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confidence: 99%

Antibiotics removal from aquatic environments: adsorption of enrofloxacin, trimethoprim, sulfadiazine, and amoxicillin on vegetal powdered activated carbon

Berges

Moles

Ormad

et al. 2020

Environ Sci Pollut Res

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“…It can possibly be achieved by bioaugmentation of anodophilic bacteria and possible field effects due to anode morphology and conductivity (Chandrasekhar and Venkata Mohan 2012;Chandrasekhar et al 2017). Constant efforts are being made to create better electron transfer among the anode and the anodophilic microorganism by altering anode surfaces and coating an active catalyst on the surface of the electrode (Chandrasekhar 2019). SMFC technology is facing many challenges to become a renewable energy source and an efficient bioremediation technique.…”

Section: Future Scope Of Smfcmentioning

confidence: 99%

SMFC as a tool for the removal of hydrocarbons and metals in the marine environment: a concise research update

Gambino

Chandrasekhar

Nastro

2021

Environ Sci Pollut Res

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Marine pollution is becoming more and more serious, especially in coastal areas. Because of the sequestration and consequent accumulation of pollutants in sediments (mainly organic compounds and heavy metals), marine environment restoration cannot exempt from effective remediation of sediments themselves. It has been well proven that, after entering into the seawater, these pollutants are biotransformed into their metabolites, which may be more toxic than their parent molecules. Based on their bioavailability and toxic nature, these compounds may accumulate into the living cells of marine organisms. Pollutants bioaccumulation and biomagnification along the marine food chain lead to seafood contamination and human health hazards. Nowadays, different technologies are available for sediment remediation, such as physicochemical, biological, and bioelectrochemical processes. This paper gives an overview of the most recent techniques for marine sediment remediation while presenting sediment-based microbial fuel cells (SMFCs). We discuss the issues, the progress, and future perspectives of SMFC application to the removal of hydrocarbons and metals in the marine environment with concurrent energy production. We give an insight into the possible mechanisms leading to sediment remediation, SMFC energy balance, and future exploitation.

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“…Early-stage BES research focused primarily on knowing how functional factors (such as electrode material, biocatalyst, pH, temperature, etc.) influence their efficiency and develop new system designs and novel techniques to improve their overall process efficiency [21,27,57,58]. Most of these investigations were conducted as electrolytes with synthetic media to allow investigators to maintain control over the substrate's composition [21].…”

Section: Bes For Wastewater Treatment and Power Productionmentioning

confidence: 99%

“…For example, BES operated with real field wastewater produced power densities in the range of several tens of mW/m 2 , which contrasts with the hundreds and even thousands of mW/m 2 that can be achieved with synthetic effluents [60,61]. Regardless of modern developments in electrode materials [27] and device configurations, BES power generation has not been dramatically enhanced. Problems, for instance, low conductivity and low power of the buffer, are often cited as the key aspects explaining the low output detected [21].…”

Section: Bes For Wastewater Treatment and Power Productionmentioning

confidence: 99%

Bioelectrochemical system-mediated waste valorization

Chandrasekhar

Kumar

Raj

et al. 2021

Syst Microbiol and Biomanuf

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Bioelectrochemical systems (BESs) are a new and emerging technology in the field of fermentation technology. Electrical energy was provided externally to the microbial electrolysis cells (MECs) to generate hydrogen or value-added chemicals, including caustic, formic acid, acetic acid, and peroxide. Also, BES was designed to recover nutrients, metals or remove recalcitrant compounds. The variety of naturally existing microorganisms and enzymes act as a biocatalyst to induce potential differences amid the electrodes. BESs can be performed with non-catalyzed electrodes (both anode and cathode) under favorable circumstances, unlike conventional fuel cells. In recent years, value-added chemical producing microbial electrosynthesis (MES) technology has intensely broadened the prospect for BES. An additional strategy includes the introduction of innovative technologies that help with the manufacturing of alternative materials for electrode preparation, ion-exchange membranes, and pioneering designs. Because of this, BES is emerging as a promising technology. This article deliberates recent signs of progress in BESs so far, focusing on their diverse applications beyond electricity generation and resulting performance.

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Effective and Nonprecious Cathode Catalysts for Oxygen Reduction Reaction in Microbial Fuel Cells

Cited by 20 publications

References 101 publications

Antibiotics removal from aquatic environments: adsorption of enrofloxacin, trimethoprim, sulfadiazine, and amoxicillin on vegetal powdered activated carbon

Antibiotics removal from aquatic environments: adsorption of enrofloxacin, trimethoprim, sulfadiazine, and amoxicillin on vegetal powdered activated carbon

SMFC as a tool for the removal of hydrocarbons and metals in the marine environment: a concise research update

Bioelectrochemical system-mediated waste valorization

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