Evaluation of solar photocatalysis using TiO2 slurry in the inactivation of Cryptosporidium parvum oocysts in water

Abeledo-Lameiro, María Jesús; Ares-Mazás, Elvira; Goméz-Couso, Hipólito

doi:10.1016/j.jphotobiol.2016.08.016

Cited by 17 publications

(5 citation statements)

References 43 publications

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“…coli) disinfection Water treatment–microbial decontamination 10 6 cpu/mL Ultraviolet lamp 95% disinfection Ng et al ( 2010 ) TiO 2 Commercial P25 Fungi ( F . solani) disinfection Water treatment–microbial decontamination 10 3 cpu/mL Sunlight 99.99% removal Fernández-Ibáñez et al ( 2009 ) TiO 2 Commercial P25 Protozoa ( C.parvum ) disinfection Water treatment–microbial decontamination 15 × 10 6 oocytes 1100 W Xenon arc lamp 99.33% Abeledo-Lameiro et al ( 2016 ) Bismuth/TiO 2 Sol–gel Water splitting/methanol sacrificial agent Sustainable energy – Ultraviolet lamp 3.5 mL hydrogen production Wu et al ( 2009 ) Platinum/Nitrogen/TiO 2 Hydrothermal Water splitting/glycerol sacrificial agent Sustainable energy – 250 W Ultraviolet lamp 3200 µmol hydrogen production Slamet et al ( 2013 ) Platinum/TiO 2−x N x Microemulsification Water splitting/methanol sacrificial agent Sustainable energy – 400 W halogen lamp 130 µmol hydrogen production Lin et al ( 2009 ) Nickel/TiO 2 …”

Section: Techniques For Titanium Dioxide Synthesismentioning

confidence: 99%

Synthesis and application of titanium dioxide photocatalysis for energy, decontamination and viral disinfection: a review

Nachiappan²,

et al. 2022

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Global pollution is calling for advanced methods to remove contaminants from water and wastewater, such as TiO 2 -assisted photocatalysis. The environmental applications of titanium dioxide have started after the initial TiO 2 application for water splitting by Fujishima and Honda in 1972. TiO 2 is now used for self-cleaning surfaces, air and water purification systems, microbial inactivation and selective organic conversion. The synthesis of titanium dioxide nanomaterials with high photocatalytic activity is actually a major challenge. Here we review titanium dioxide photocatalysis with focus on mechanims, synthesis, and applications. Synthetic methods include sol-gel, sonochemical, microwave, oxidation, deposition, hydro/solvothermal, and biological techniques. Applications comprise the production of energy, petroleum recovery, and the removal of microplastics, pharmaceuticals, metals, dyes, pesticides, and of viruses such as the severe acute respiratory syndrome coronavirus 2.

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Section: Techniques For Titanium Dioxide Synthesismentioning

confidence: 99%

Synthesis and application of titanium dioxide photocatalysis for energy, decontamination and viral disinfection: a review

Nachiappan²,

et al. 2022

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“…The results of these studies were satisfactory as they were characterized by a high level of bacterial inactivation. Research by Abeledo-Lameiro et al (2016) showed the effectiveness of photocatalysis also against Cryptosporidium parvum oocysts in water. In turn, Zhao and Yang (2003) used this technology for wastewater treatment.…”

Section: Radiant Catalytic Ionization-principle Of Operation and Cons...mentioning

confidence: 99%

Antimicrobial effect of radiant catalytic ionization

Skowron

Wiktorczyk-Kapischke

Grudelwska-Buda

et al. 2022

Letters in Applied Microbiology

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“…Other works combine physiological assays with gene expression analysis, where some genes related to the OS are overexpressed (metallothionein), but intracellular levels of superoxide dismutase (SOD) and catalase (CAT) activities are not elevated [199]. All the possible variety of resistance mechanisms and the variability of the composition of the environment that could interact negatively the inhibition with nanoparticles, such as the C. parvum tested with TiO2 in wastewater [200], makes it difficult to establish a safe concentration and interaction time. It is important to verify the viability, lipid composition, gene expression and ROS levels in order to elucidate an effective mechanism of inhibition.…”

Section: Protozoanmentioning

confidence: 99%

An approach to the photocatalytic mechanism in the TiO2-nanomaterials microorganism interface for the control of infectious processes

Rodríguez-González

Obregón

Patrón-Soberano

et al. 2020

Applied Catalysis B: Environmental

149

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J o u r n a l P r e -p r o o f 2 Graphical Abstract Highlights  Photoactive TiO2 nanomaterials can solve the actual microbial infectious defies  The microbial cell/TiO2 surface approach is key to get the photo-kill mechanism  Microbial preparation requires a reproducible protocol for proper characterization  Advanced surface characterization techniques can unravel the photo-kill mechanism  Generation of ROS, physical injuries and biocidal features confirm the annihilation J o u r n a l P r e -p r o o f Abstract The approach of this timely review considers the current literature that is focused on the interface nanostructure/cell-wall microorganism to understand the annihilation mechanism. Morphological studies use optical and electronic microscopes to determine the physical damage on the cell-wall and the possible cell lysis that confirms the viability and microorganism death. The key parameters of the tailoring the surface of the photoactive nanostructures such as the metal functionalization with bacteriostatic properties, hydrophilicity, textural porosity, morphology and the formation of heterojunction systems, can achieve the effective eradication of the microorganisms under natural conditions, ranging from practical to applications in environment, agriculture, and so on. However, to our knowledge, a comprehensive review of the microorganism/nanomaterial interface approach has rarely been conducted. The final remarks point the ideal photocatalytic way for the effective prevention/eradication of microorganisms, considering the resistance that the microorganism could develop without the appropriate regulatory aspects for human and ecosystem safety. Introduction and background 1. TiO 2 based materials obtained from TiO 2 and its composites J o u r n a l P r e -p r o o f previous studies have demonstrated that photocatalysis can be considered a promising tool in anticancer therapies, since the photocatalyst can kill cancer cells such as HeLa cells, which cause cervical cancer [7]. The energy absorbed by the photocatalyst comprises the range of ultraviolet and/or visible light, even natural sunlight. When the photocatalyst absorbs light, if the energy of the photons is enough to excite the electrons J o u r n a l P r e -p r o o f 6in the valence band (VB), then they migrate to a higher energy level in the conduction band (CB) of the material, as it is illustrated in Fig. 1. This phenomenon generates the charge carriers known as hole-electron pairs. The photogenerated hole can migrate to the surface of the material and react with water molecules or hydroxyl ions to produce hydroxyl radicals, while the photoexcited electron in the conduction band can react with the adsorbed molecular oxygen to produce superoxide ions [8]. Since the report of Fujishima and Honda about the water splitting process using a TiO2 electrode under UV irradiation, numerous studies have exploited the photoactive properties of this material [9,10]. Several reviews have studied the relationship between the electronic properties of TiO2 with...

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Evaluation of solar photocatalysis using TiO2 slurry in the inactivation of Cryptosporidium parvum oocysts in water

Cited by 17 publications

References 43 publications

Synthesis and application of titanium dioxide photocatalysis for energy, decontamination and viral disinfection: a review

Synthesis and application of titanium dioxide photocatalysis for energy, decontamination and viral disinfection: a review

Antimicrobial effect of radiant catalytic ionization

An approach to the photocatalytic mechanism in the TiO2-nanomaterials microorganism interface for the control of infectious processes

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