Graphene oxide triggers mass transfer limitations on the methanogenic activity of an anaerobic consortium with a particulate substrate

Bueno-López, José Iván; Rangel-Méndez, J. Rene; Alatriste‐Mondragón, Felipe; Pérez-Rodríguez, Fátima; Hernández‐Montoya, Virginia; Cervantes, Francisco J.

doi:10.1016/j.chemosphere.2018.08.001

Cited by 23 publications

(12 citation statements)

References 48 publications

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“…Nevertheless, rGO sheets never wrapped starch granules [rGO4 in Fig. 3(e)] as previously reported with GO, 17 so that they were always interacting with cells and exopolysaccharides (Fig. 3(f)).…”

Section: Physical Characterization Of Rgosupporting

confidence: 70%

“…These results suggest that rGO materials did not cover starch granules, which was shown to occur in sludge incubations conducted with GO. 17 Wrapping of starch granules by GO sheets resulted in mass transfer limitations negatively affecting the methanogenic activity of anaerobic sludge. 17 In experiments performed with starch, it was observed that the highest methane production was obtained with rGO1, which makes sense when considering the smaller particle size of this conductive material as compared to the other reduced materials.…”

Section: Physical Characterization Of Rgomentioning

confidence: 99%

“…17 Wrapping of starch granules by GO sheets resulted in mass transfer limitations negatively affecting the methanogenic activity of anaerobic sludge. 17 In experiments performed with starch, it was observed that the highest methane production was obtained with rGO1, which makes sense when considering the smaller particle size of this conductive material as compared to the other reduced materials. Namely, rGO1 has a greater exposed surface area than rGO2 and rGO4, and therefore, it has a greater interaction with starch granules.…”

Section: Physical Characterization Of Rgomentioning

confidence: 99%

“…In fact, the envelope of starch granules is given by the interaction of the oxygenated groups of GO, which have negative charge, and the hydroxyl groups in starch, which have positive charge. 17 The above opens the questions on what interactions occur between rGO and starch and what the effects will be when all these components are present in anaerobic digestion processes.…”

Section: Introductionmentioning

confidence: 99%

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Methane production enhanced by reduced graphene oxide in an anaerobic consortium supplied with particulate and soluble substrates

Bueno-López

Díaz‐Hinojosa

Rangel-Méndez

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: Graphene materials have extensively been applied in several industries due to their enhanced properties. Predictably, these materials also end up in wastewaters generated from industrial sectors, and their effects on biological treatment systems are poorly understood. The aim of the present study was to assess the acute effects of graphene oxide (GO) with three different degrees of reduction [reduced GO (rGO) produced with reduction times of 1, 2, and 4 h] on the methane production of an anaerobic consortium. RESULTS: Synthesized rGO materials had a stimulatory effect increasing the maximum methanogenic activity (MMA) up to 14% and 114% when glucose and starch were provided as substrates, respectively, as compared to the MMA achieved in controls incubated in the absence of rGO. Reduction of GO promoted physical-chemical changes in its structure, such as the removal of epoxy groups, which prevented grapping of starch granules by the produced rGO sheets and triggered a better interaction between the latter and microorganisms. Furthermore, this work showed that rGO stimulated starch disintegration into its components, thus accelerating its hydrolysis, which was ultimately reflected in a higher MMA when this particulate polymer was used as substrate. CONCLUSION: This study reports for the first time the acute effects of rGO on the methanogenic activity of an anaerobic consortium supplied with both soluble and particulate substrates. This information is relevant to elucidate the effects of this graphene material in anaerobic microorganisms and to improve the performance of anaerobic systems during the treatment of industrial wastewaters.

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Section: Physical Characterization Of Rgosupporting

confidence: 70%

Section: Physical Characterization Of Rgomentioning

confidence: 99%

Section: Physical Characterization Of Rgomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Methane production enhanced by reduced graphene oxide in an anaerobic consortium supplied with particulate and soluble substrates

Bueno-López

Díaz‐Hinojosa

Rangel-Méndez

et al. 2020

J of Chemical Tech & Biotech

Self Cite

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show abstract

“…36,37 The response of ACC to promote anaerobic digestion of swine effluent was very low, as evidenced by the methane yield obtained, which was only 10% with respect to GF incubations ( Figure 3 and Table 2). Previous studies have documented methanogenesis inhibition by the action of some carbon-based materials like carbon black due to cell damages in methanogens, 39 oxides due to their effect wrapping starch granules, 40 and by their influence-reducing antibiotics resistance genes changes. 41 The low methane production in ACC incubations could be attributable to its physicochemical nature.…”

Section: Methane Production With Carbon Materialsmentioning

confidence: 99%

Methane production from antibiotic bearing swine wastewater using carbon‐based materials as electrons' conduits during anaerobic digestion

Burboa-Charis

Álvarez

2020

Int J Energy Res

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The impact of granular-activated carbon (GAC), graphite felt (GF), and activated carbon cloth (ACC), and two veterinary antibiotics, oxytetracycline (OTC) and enrofloxacin (ERX), was evaluated during the production of methane from the anaerobic digestion of swine effluent. The results showed that GAC (10 g/L) increased 3.0-fold the methane production and 1.4-fold the organic matter removal efficiency, with respect to the control in the presence of OTC (10 mg/L). With ERX, GAC also increases the production of methane with respect to ACC and GF. Adsorption experiments reveal the affinity of antibiotics to carbon materials; nonetheless, even though GAC adsorbed lesser antibiotics, which would mean that antibiotic toxicity remained, the production of methane with GAC was higher. The microbial electron-accepting capacity of GAC (0.57 mmol/g) indicates that electrons from organic matter's oxidation are driven to the material and, subsequently, may act as an electron donor for methanogens to promote methane production. Finally, ERX showed the capacity to act as a redox mediator to reduce Fe(III) up to 1.6-fold higher than the control; nonetheless, it was not reflected in improving the production of methane.

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Effects of graphene oxide and reduced graphene oxide on acetoclastic, hydrogenotrophic and methylotrophic methanogenesis

et al. 2020

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Graphene oxide triggers mass transfer limitations on the methanogenic activity of an anaerobic consortium with a particulate substrate

Cited by 23 publications

References 48 publications

Methane production enhanced by reduced graphene oxide in an anaerobic consortium supplied with particulate and soluble substrates

Methane production enhanced by reduced graphene oxide in an anaerobic consortium supplied with particulate and soluble substrates

Methane production from antibiotic bearing swine wastewater using carbon‐based materials as electrons' conduits during anaerobic digestion

Effects of graphene oxide and reduced graphene oxide on acetoclastic, hydrogenotrophic and methylotrophic methanogenesis

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