Azo dye biotransformation mediated by AQS immobilized on activated carbon cloth in the presence of microbial inhibitors

Castañon, Daniel; Álvarez, Luis H.; Peña, Karen Isabel Cabrera; García-Reyes, Refugio Bernardo; Martínez, Claudia M.; Pat-Espadas, Aurora M.

doi:10.1016/j.envpol.2019.06.050

Cited by 17 publications

(5 citation statements)

References 35 publications

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“…GAC, ACC, and GF were selected as conductive and adsorbing agents during the anaerobic digestion of liquid fraction of swine effluent. GAC and ACC were selected by their capacity to act as redox mediators during the microbial transformation of pollutants 23,24 . GF was selected by its proven capacity to act as electrodes in bioelectrochemical systems 25 .…”

Section: Methodsmentioning

confidence: 99%

“…GAC and ACC were selected by their capacity to act as redox mediators during the microbial transformation of pollutants. 23,24 GF was selected by its proven capacity to act as electrodes in bioelectrochemical systems. 25 GAC (8 × 30 Clarimex) was crushed and sieved to obtain particles in size between 425 and 600 μm, then it was washed with distilled water to remove fine particles and dried at 55 C for F I G U R E 1 Chemical structure of antibiotics used in the methanogenic experiments 24 hours.…”

Section: Carbon-based Materialsmentioning

confidence: 99%

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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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Section: Methodsmentioning

confidence: 99%

Section: Carbon-based 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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“…Compared with the images of the separate diesel-degrading bacteria (Figure 2A) and the MAC suspension (Figure 2B), it can be clearly seen that almost all of the mixed bacterial cells were attached to the surfaces of MAC particles, and no free cells were present in solution (Figure 2C). Compared with the traditional activated carbon (AC) materials, the MAC had a larger specific surface area, higher adsorption capacity and greater hydrophobicity [27], indicating a higher adsorption ability of the bacterial colonization [16]. The MAC had a greater van der Waals force and electrostatic action with the negatively charged bacteria according to the DLVO theory [28].…”

Section: Sem Observation Of Bacterial Immobilizationmentioning

confidence: 99%

“…The immobilization of degrading bacteria on the carbon materials improved the degradation efficiency of the petroleum hydrocarbon in the bioremediation process [12][13][14]. Among the commonly reported carbon sorbents, activated carbon (AC) is an excellent adsorbent with stable chemical properties [15], a developed microporous structure [16], a large specific surface area and many functional groups [17], which has been widely used as a carrier for microbial cells in the membrane bioreactor process [12]. However, the smaller the particle size of the activated carbon, the higher the adsorption capacity of the contaminants and bacteria.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Micron-Scale Activated Carbon-Immobilized Bacteria for the Adsorption–Biodegradation of Diesel Oil

Zhang

Kong

Han

et al. 2022

Water

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This paper investigated the micron-scale activated carbon (MAC) immobilized diesel-oil-degrading bacteria (bio-MAC) used as remediation materials for the removal of diesel-oil-contaminated water. The high-efficiency indigenous diesel-oil-degrading bacteria were firstly screened and enriched, then the MAC was used as a diesel oil sorbent and biocarrier for the immobilization of degrading bacteria to prepare the bio-MAC material. The removal performance of the bio-MAC was evaluated via a comparison with the freely degrading bacteria and MAC. The SEM results demonstrated that the diesel-oil-degrading bacteria were effectively immobilized and grew well on the surfaces of MAC particles. The concentration of MAC significantly influenced the growth and activity (DHA and LPS) of immobilized bacteria, and the MAC addition of 3.0 g/L was proven to be an optimum amount for the preparation of bio-MAC. The high-throughput sequencing analysis further indicated that the bacteria immobilized on MAC showed higher abundance levels and diversities index values compared to freely suspended bacteria, such as Pseudomonas, Rhodococcus, Bacillus and Microbacterium. The FTIR spectroscopy results showed that the bio-MAC could effectively degrade the aliphatic hydrocarbons, alkenes and aromatic compounds of diesel oil to carboxylic acids, esters, alcohols and other metabolites. When the concentration of diesel oil was 1 g/L, the removal efficiency for the diesel oil of bio-MAC reached 86.35% after 15 days, while only 23.82% and 70.97% of the diesel oil was removed using the same amount of free bacteria and MAC, respectively. The prepared bio-MAC showed a synergic effect of adsorption and biodegradation and efficiently removed diesel oil from wastewater.

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“…Several studies have shown that the presence of bacteria over ACs favors the sorption of organic pollutants by increasing the hydrophobicity of ACs [37][38][39][40][41][42][43][44][45] water was prepared in the laboratory using the Millipore water purification system and was used to perform all experiments.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of Bacillus subtilis BMT4i/Activated carbon composite for removal of diclofenac and carbamazepine from aqueous solution

Tiwari,

RAYCHOUDHURY,

Bag

2024

Preprint

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Pharmaceutical contaminants (PhACs) have become a worldwide concern in the present scenario. It is considered a group of emerging contaminants and is ubiquitously found in different water bodies in higher concentrations, leading to the deterioration of the water quality and causing ecotoxicity to several non-target organisms. This study extensively evaluates the efficacy of the bacterial strain Bacillus subtilis BMT4i for removing two emerging PhACs, diclofenac (DCF) and carbamazepine (CBZ), from an aqueous solution. A series of batch experiments were conducted by keeping parameters similar to wastewater effluent to investigate the biodegradation of B. subtilis BMT4i in removing PhACs in real scenarios. The study showed that around 67% and 50% of DCF and CBZ were removed within 72 hours when PhACs were supplied as the sole carbon source. Moreover, in co-metabolism with other carbon and nitrogen sources, the percentage removal was enhanced by 20-30%. Further, B. subtilis BMT4i were immobilized on two activated carbons (ACs) i.e., ACEco, and ACDarco prepared from coconut shells and coal so that the composite could directly be used as a bioreactor. The biofilm formation over ACs was confirmed by scanning electron microscopy and Fourier-transform infrared spectroscopy. The results obtained with batch experiment showed over 85-100% removal of both PhACs in a short duration of 2 hours. Moreover, the column studies revealed that around 60-77% of 1 mg/l PhACs were removed by passing over 2 liters of PhACs contaminated water. Overall, the current study confirms that the B. subtilis BMT4i/ACs composite shows promising performance for removing selected PhACs from water.

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Azo dye biotransformation mediated by AQS immobilized on activated carbon cloth in the presence of microbial inhibitors

Cited by 17 publications

References 35 publications

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

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

Preparation of Micron-Scale Activated Carbon-Immobilized Bacteria for the Adsorption–Biodegradation of Diesel Oil

Efficacy of Bacillus subtilis BMT4i/Activated carbon composite for removal of diclofenac and carbamazepine from aqueous solution

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