Solar photocatalytic disinfection of E. coli and bacteriophages MS2, ΦX174 and PR772 using TiO 2 , ZnO and ruthenium based complexes in a continuous flow system

Mahon, Joanne Mac; Pillai, Suresh C.; Kelly, John M.; Gill, Laurence

doi:10.1016/j.jphotobiol.2017.03.027

Cited by 40 publications

(16 citation statements)

References 88 publications

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“…In Figures 9(a)-9(d), the E. coli cells were mostly either irreversibly deformed or collapsed, with fissures and pits visible on the cell membrane, indicating the loss of integrity and viability of the E. coli cells, consistent with [37][38][39][40]. In fact, the bacterial inhibition performance of the SG-TiO 2 thin film, given the UVA exposure, resembles that of the SPTiO 2 thin film.…”

Section: Photocatalytic Bacterialmentioning

confidence: 79%

E. coli Bacteriostatic Action Using TiO₂ Photocatalytic Reactions

Rojviroon

Sirivithayapakorn

2018

International Journal of Photoenergy

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This experimental research comparatively investigates the Escherichia coli (E. coli) bacterial inactivation of the TiO 2 photocatalytic thin films fabricated by the sol-gel dip-coating (SG) and low-temperature spray-coating (SP) techniques, with low-intensity (12 μW·cm . Moreover, the essential physical characteristics of the SG-TiO 2 and SP-TiO 2 photocatalytic thin films were determined prior to the experimental bacterial inactivation. The findings showed that both photocatalytic thin films possessed the ideal physical characteristics, especially the SP-TiO 2 thin film. In addition, the viable cell counts, the cell morphology, and the bioluminescence-based adenosine triphosphate (ATP) indicated that both SG-TiO 2 and SP-TiO 2 thin films under UVA could effectively inhibit the proliferation of the E. coli cells in both NB and 0.85% NaCl.

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Section: Photocatalytic Bacterialmentioning

confidence: 79%

E. coli Bacteriostatic Action Using TiO₂ Photocatalytic Reactions

Rojviroon

Sirivithayapakorn

2018

International Journal of Photoenergy

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“…Mahon and friends investigated the performance of photocatalytic treatment processes by using different photocatalysts against E. coli and bacteriophages MS2, ΦX174 and PR772, under real sunlight conditions [26].…”

Section: Uv-drs Analysis and Structural Propertiesmentioning

confidence: 99%

A NOVEL AND EFFICIENT PHOTOCATALYSIS (ZnO/BENTONITE) FOR DISINFECTION OF Escherichia coli AND Pseudomonas aeruginosa UNDER VISIBLE LIGHT IRRADIATION

Artagan

Vai̇zoğullar

2022

Eskişehir Teknik Üniversitesi Bilim Ve Teknoloji Dergisi - C Yaşam Bilimleri Ve Biyoteknoloji

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In the present study, a new composite catalyst which highly active under the visible light was synthesized by immobilizing onto bentonite surface using ZnO materials (ZnO/Bent). For this, a simple in situ participant technique was used. The samples were characterized using SEM, XRD, BET techniques. SEM images possess that ZnO particles have nearly a spherical structure. Bentonite clay was used to increase the surface area of the samples. The obtained BET surface area of the samples shows that the ZnO/Bent catalyst was lower than that of pure Bentonite. The aim of this study was to evaluate the effectiveness of photocatalytic disinfection with ZnO-Bent composite against Escherichia coli and Pseudomonas aeruginosa under visible light. The obtained results show that when E. coli strain was subjected to ZnO-Bent mediated photocatalytic disinfection under solar irradiation, more than 98 % disinfection of the targeted E. coli was achieved within 2 hours and also 100% of P. aeruginosa colonies were inactivated within 4 hours under solar irradiation. A Possible degradation mechanism for ZnO/Bent composite was proposed in this study.

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“…This "residual disinfecting effect" was also observed [42] when UV-LED lamp was used for irradiation of TiO2. The explanation Based on the satisfactory results, the solar photocatalytic disinfection (SPC-DIS) started to develop and focus on more resistant microorganisms, like: Cryptosporidium parvum [119,127,128], Bacillus subtilis [118], protozoa [118], photogenic fungi ( [38,118], and MS2 [129]. However, according to Lonnen et al [101], SPC-DIS was ineffective against the cyst stage of Acanthamoeba polyphaga.…”

Section: Photocatalytic Disinfectionmentioning

confidence: 99%

Ozone and Photocatalytic Processes for Pathogens Removal from Water: A Review

et al. 2019

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The search for alternative water sources is pushing to the reuse of treated water coming from municipal wastewater treatment plants. However, this requires that tightened standards be fulfilled. Among them is the microbiological safety of reused water. Although chlorination is the mostly applied disinfection system, it presents several disadvantages, such as the high doses required and the possibility of formation of dangerous by-products. Moreover, the threat of antibiotic resistance genes (ARGs) spread throughout poorly treated water is requiring the implementation of more efficient disinfection systems. Ozone and photo assisted disinfection technologies are being given special attention to reach treated water with higher quality. Still, much must be done to optimize the processes so that cost-effective systems may be obtained. This review paper gives a critical overview on the application of ozone and photo-based disinfection systems, bearing in mind their advantages and disadvantages when applied to water and municipal wastewater. Also, the possibility of integrated disinfection systems is considered.

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Solar photocatalytic disinfection of E. coli and bacteriophages MS2, ΦX174 and PR772 using TiO 2 , ZnO and ruthenium based complexes in a continuous flow system

Cited by 40 publications

References 88 publications

E. coli Bacteriostatic Action Using TiO₂ Photocatalytic Reactions

E. coli Bacteriostatic Action Using TiO₂ Photocatalytic Reactions

A NOVEL AND EFFICIENT PHOTOCATALYSIS (ZnO/BENTONITE) FOR DISINFECTION OF Escherichia coli AND Pseudomonas aeruginosa UNDER VISIBLE LIGHT IRRADIATION

Ozone and Photocatalytic Processes for Pathogens Removal from Water: A Review

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Solar photocatalytic disinfection of E. coli and bacteriophages MS2, ΦX174 and PR772 using TiO 2 , ZnO and ruthenium based complexes in a continuous flow system

Cited by 40 publications

References 88 publications

E. coli Bacteriostatic Action Using TiO2 Photocatalytic Reactions

E. coli Bacteriostatic Action Using TiO2 Photocatalytic Reactions

A NOVEL AND EFFICIENT PHOTOCATALYSIS (ZnO/BENTONITE) FOR DISINFECTION OF Escherichia coli AND Pseudomonas aeruginosa UNDER VISIBLE LIGHT IRRADIATION

Ozone and Photocatalytic Processes for Pathogens Removal from Water: A Review

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E. coli Bacteriostatic Action Using TiO₂ Photocatalytic Reactions

E. coli Bacteriostatic Action Using TiO₂ Photocatalytic Reactions