Photoelectrocatalytic inactivation of Pseudomonas aeruginosa using an Ag-decorated TiO2 photoanode

Domínguez-Espíndola, Ruth Belinda; Bruguera-Casamada, Carmina; Martı́nez, Susana Silva; Araujo, Rosa; Brillas, Enric; Sirés, Ignasi

doi:10.1016/j.seppur.2018.05.005

Cited by 32 publications

(22 citation statements)

References 48 publications

(67 reference statements)

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“…Consequently, antibiotic resistance has been observed in some P. aeruginosa strains. So strategies to address this have focused on the use of bacteriophage mixes with or without the antibiotics, [35,36] using the surface modification with copper [37] and silver [37,38] or graphene oxide, [39] to improve antibacterial effect. Copper and silver ions concentrations tested (0.1-0.8 mg/l) achieved more than 99.999% reduction of P. aeruginosa, in 6, 12, and 96 h, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Copper and silver ions concentrations tested (0.1-0.8 mg/l) achieved more than 99.999% reduction of P. aeruginosa, in 6, 12, and 96 h, respectively. [37,38] But combination of copper and silver ions exhibited a synergistic effect against P. aeruginosa. [37] Pseudomonas aeruginosa cells increased up to 1.75 log CFU/ml over 14-day incubation period inside bottles containing the polymer without DP1 phages ("positive control bottle").…”

Section: Resultsmentioning

confidence: 99%

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Inactivation of Pseudomonas aeruginosa in mineral water by DP1 bacteriophage immobilized on ethylene‐vinyl acetate copolymer used as seal caps of plastic bottles

Novello

Sillankorva

Pires

et al. 2020

J of Applied Polymer Sci

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Pseudomonas aeruginosa has been found in bottled natural mineral water, even though its presence is not allowed in this product by different food regulations. This study aimed to investigate the inactivation of P. aeruginosa present in mineral water by vB_PaeM_CEB_DP1 (short name DP1) bacteriophage immobilized on ethylene-vinyl acetate (EVA) copolymer used as seal caps of plastic bottles. EVA was chemically modified using microwave-assisted alcoholysis, improving polymer-phage binding. After that, DP1 phage was attached to EVA and EVA-OH copolymers and both surfaces were tested for plaque formation using P. aeruginosa. Then, both materials containing immobilized phages were used as seal caps of plastic bottles and its antimicrobial capacity was tested against P. aeruginosa contaminating mineral water.The EVA-OH resulted in higher hydrogen bond density that contributed significantly to the phage immobilization on the polymer surface. The polymers containing immobilized phages were able to reduce 0.53 log of P. aeruginosa population present inside mineral water bottles after 14 days.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Inactivation of Pseudomonas aeruginosa in mineral water by DP1 bacteriophage immobilized on ethylene‐vinyl acetate copolymer used as seal caps of plastic bottles

Novello

Sillankorva

Pires

et al. 2020

J of Applied Polymer Sci

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“…In the presence of NaCl or NaBr for instance, photo-electrocatalytic inactivation efficiencies of the pathogens are remarkably enhanced due to the formation of RHS ( Nie et al., 2014a ). The production of RHS can also be successfully couped to a high electrolyte concentration which results in fast inactivation due to high ionic conductivity values ( Domínguez-Espíndola et al., 2019 ). In this regard, it is important to note that due to the complex combination of effects in real effluents, many studies employ synthetic solutions of known composition so that salts such as Na 2 SO 4 , NaNO 3 and NaCl are used to achieve a convenient conductivity level for the electrochemical events to take place.…”

Section: Infectious Agents Commonly Found In Water and Wastewatermentioning

confidence: 99%

Photo-assisted electrochemical advanced oxidation processes for the disinfection of aqueous solutions: A review

et al. 2021

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Disinfection is usually the final step in water treatment and its effectiveness is of paramount importance in ensuring public health. Chlorination, ultraviolet (UV) irradiation and ozone (O 3 ) are currently the most common methods for water disinfection; however, the generation of toxic by-products and the non-remnant effect of UV and O 3 still constitute major drawbacks. Photo-assisted electrochemical advanced oxidation processes (EAOPs) on the other hand, appear as a potentially effective option for water disinfection. In these processes, the synergism between electrochemically produced active species and photo-generated radicals, improve their performance when compared with the corresponding separate processes and with other physical or chemical approaches. In photo-assisted EAOPs the inactivation of pathogens takes place by means of mechanisms that occur at different distances from the anode, that is: (i) directly at the electrode’s surface (direct oxidation), (ii) at the anode’s vicinity by means of electrochemically generated hydroxyl radical species (quasi-direct), (iii) or at the bulk solution (away from the electrode surface) by photo-electrogenerated active species (indirect oxidation). This review addresses state of the art reports concerning the inactivation of pathogens in water by means of photo-assisted EAOPs such as photo-electrocatalytic process, photo-assisted electrochemical oxidation, photo-electrocoagulation and cathodic processes. By focusing on the oxidation mechanism, it was found that while quasi-direct oxidation is the preponderant inactivation mechanism, the photo-electrocatalytic process using semiconductor materials is the most studied method as revealed by numerous reports in the literature. Advantages, disadvantages, trends and perspectives for water disinfection in photo-assisted EAOPs are also analyzed in this work.

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“…The performance of the PC treatment can be adversely affected by the rapid recombination of the photogenerated electrons and holes (e − CB /h + VB ) [ 47 , 127 ] because each recombination leads to the loss of a hole that otherwise would have been a precursor of a disinfection reaction. Several studies suggested that, applying a constant current density or a constant bias anodic potential to the illuminated semiconductor prevents this recombination [ 14 , 15 ]. As demonstrated by Mesones et al [ 128 ], the production of oxidizing species is directly proportional to the current density applied to the anode.…”

Section: Combination With Other Technologiesmentioning

confidence: 99%

“…Among the most critical aspects that prevent water reuse, microbiological contamination plays a key role because microorganisms can cause more or less serious diseases and even death in humans and animals [ 14 ]. Several serious infections, such as pneumonia, dermatitis and otitis are the hazardous result of gram-negative bacteria like Pseudomonas aeruginosa [ 15 ]. In this contest, disinfection represents the main treatment useful for the inactivation of helminths, protozoa, fungi, pathogenic bacteria, and viruses to protect consumers health and the environment making it possible to reuse WWTPs effluents [ 11 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Disinfection of Wastewater by UV-Based Treatment for Reuse in a Circular Economy Perspective. Where Are We at?

Collivignarelli

Abbà

Miino

et al. 2020

IJERPH

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Among the critical issues that prevent the reuse of wastewater treatment plants (WWTPs) effluents in a circular economy perspective, the microbiological component plays a key role causing infections and diseases. To date, the use of conventional chemical oxidants (e.g., chlorine) represent the main applied process for wastewater (WW) disinfection following a series of operational advantages. However, toxicity linked to the production of highly dangerous disinfection by-products (DBPs) has been widely demonstrated. Therefore, in recent years, there is an increasing attention to implement sustainable processes, which can simultaneously guarantee the microbiological quality of the WWs treated and the protection of both humans and the environment. This review focuses on treatments based on ultraviolet radiation (UV) alone or in combination with other processes (sonophotolysis, photocatalysis and photoelectrocatalysis with both natural and artificial light) without the dosage of chemical oxidants. The strengths of these technologies and the most significant critical issues are reported. To date, the use of synthetic waters in laboratory tests despite real waters, the capital and operative costs and the limited, or absent, experience of full-scale plant management (especially for UV-based combined processes) represent the main limits to their application on a larger scale. Although further in-depth studies are required to ensure full applicability of UV-based combined processes in WWTPs for reuse of their purified effluents, excellent prospects are presented thanks to an absent environmental impact in terms of DBPs formation and excellent disinfection yields of microorganisms (in most cases higher than 3-log reduction).

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Photoelectrocatalytic inactivation of Pseudomonas aeruginosa using an Ag-decorated TiO2 photoanode

Cited by 32 publications

References 48 publications

Inactivation of Pseudomonas aeruginosa in mineral water by DP1 bacteriophage immobilized on ethylene‐vinyl acetate copolymer used as seal caps of plastic bottles

Inactivation of Pseudomonas aeruginosa in mineral water by DP1 bacteriophage immobilized on ethylene‐vinyl acetate copolymer used as seal caps of plastic bottles

Photo-assisted electrochemical advanced oxidation processes for the disinfection of aqueous solutions: A review

Disinfection of Wastewater by UV-Based Treatment for Reuse in a Circular Economy Perspective. Where Are We at?

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