Ultraviolet C irradiation: A promising approach for the disinfection of public spaces?

The Science of The Total Environment, Год журнала: 2023, Номер 879, С. 163007 - 163007

Опубликована: Март 23, 2023

Ultraviolet irradiation C (UVC) has emerged as an effective strategy for microbial control in indoor public spaces. UVC is commonly applied air, surface, and water disinfection. Unlike common 254 nm UVC, far-UVC at 222 considered non-harmful to human health, being safe occupied spaces, still disinfection purposes. Therefore, allied the urgency mitigate current pandemic of SARS-CoV-2, increase UVC-based technology devices appeared market with levels pathogens reduction higher than 99.9 %. This environmentally friendly potential overcome many limitations traditional chemical-based approaches. The novel were thought be used spaces such hospitals, schools, transport minimize risk contamination propagation, saving costs by reducing manual cleaning equipment maintenance provided manpower. However, a lack information about parameters protocols disinfection, controversies regarding health environmental risks exist. In this review, fundamentals on are presented. Furthermore, deep analysis technologies available addressed, well their advantages limitations. comprehensive provides valuable inputs strategies development effective, reliable, systems.

Язык: Английский

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Advancing Waterborne Fungal Spore Control: UV-LED Disinfection Efficiency and Post-Treatment Reactivation Analysis

Water, Год журнала: 2025, Номер 17(7), С. 922 - 922

Опубликована: Март 21, 2025

The presence of fungal spores in water poses a significant risk to public health, requiring effective inactivation strategies. Ultraviolet (UV) radiation is widely used approach, traditionally employing mercury vapor lamps. However, these lamps have efficiency limitations and contain hazardous materials. As an alternative, ultraviolet light-emitting diodes (UV-LEDs) emerged as safer more sustainable option. Despite their advantages, research on efficacy against remains limited. This study investigates the post-exposure response Aspergillus niger Penicillium sp. using collimated UV-LED system. impact two different wavelengths (265 nm 280 nm) post-treatment conditions (light darkness for 24 h) viability was analyzed. Kinetic modeling applied assess resistance capacity photoreactivation. results demonstrate that both UV wavelength environmental after exposure significantly influence disinfection outcomes. exhibited greater susceptibility but also higher photoreactivation potential, while A. showed stronger lower recovery capacity. dose required 99% inactivation, considering effects, 323.7 ± 90.0 mJ cm−2 321.9 43.8 niger, whereas sp., it 167.7 13.0 146.5 29.2 at 265 nm, respectively. These findings emphasize necessity tailoring strategies based specific characteristics target organisms factors.

Язык: Английский

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Kinetics and mechanism of sulfate radical-and hydroxyl radical-induced disinfection of bacteria and fungal spores by transition metal ions-activated peroxymonosulfate

Water Research, Год журнала: 2023, Номер 243, С. 120378 - 120378

Опубликована: Июль 17, 2023

Язык: Английский

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Rapid Inactivation of Fungal Spores in Drinking Water by Far-UVC Photolysis of Free Chlorine

Environmental Science & Technology, Год журнала: 2023, Номер 57(51), С. 21876 - 21887

Опубликована: Ноя. 18, 2023

Effective and affordable disinfection technology is one key to achieving Sustainable Development Goal 6. In this work, we develop a process by integrating Far-UVC irradiation at 222 nm with free chlorine (UV222/chlorine) for rapid inactivation of the chlorine-resistant opportunistic Aspergillus niger spores in drinking water. The UV222/chlorine achieves 5.0-log A. dosage 3.0 mg L-1 UV fluence 30 mJ cm-2 deionized water, tap surface rate constant 0.55 min-1, which 4.6-fold, 5.5-fold, 1.8-fold, respectively, higher than those UV222 alone, chlorination conventional UV254/chlorine under comparable conditions. more efficient mainly attributed enhanced generation reactive species (e.g., 6.7 × 10-15 M Cl•) instead hydroxyl radicals from photolysis chlorine, verified through both experiments kinetic model. We further demonstrate that damages membrane integrity benefits penetration into cells inactivation. merits over also include effective inhibition photoreactivation after lower formation chlorinated byproducts toxicity.

Язык: Английский

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Application of chlorine dioxide and its disinfection mechanism

Archives of Microbiology, Год журнала: 2024, Номер 206(10)

Опубликована: Сен. 10, 2024

Язык: Английский

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Unraveling bacterial and eukaryotic communities in secondary water supply systems: Dynamics, assembly, and health implications

Water Research, Год журнала: 2023, Номер 245, С. 120597 - 120597

Опубликована: Сен. 8, 2023

Язык: Английский

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New mechanistic insight into the microbial responses to on-line chemical cleaning of UF membranes with NaClO

Separation and Purification Technology, Год журнала: 2024, Номер 349, С. 127882 - 127882

Опубликована: Май 8, 2024

Язык: Английский

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Well-designed protein amyloid nanofibrils composites as versatile and sustainable materials for aquatic environment remediation: A review

Eco-Environment & Health, Год журнала: 2023, Номер 2(4), С. 264 - 277

Опубликована: Сен. 20, 2023

Amyloid nanofibrils (ANFs) are supramolecular polymers originally classified as pathological markers in various human degenerative diseases. However, recent years, ANFs have garnered greater interest and regarded nature-based sustainable biomaterials environmental science, material engineering, nanotechnology. On a laboratory scale, can be produced from food proteins via protein unfolding, misfolding, hydrolysis. Furthermore, specific structural characteristics such high aspect ratio, good rigidity, chemical stability, controllable sequence. These properties make them promising functional water decontamination research. As result, the fabrication application of their composites purification recently gained considerable attention. Despite large amount literature this field, there is lack systematic review to assess gap using remove contaminants water. This discusses significant advancements design techniques well physicochemical ANFs-based composites. We also emphasize current progress inorganic, organic, biological contaminants. The interaction mechanisms between highlighted. Finally, we illustrate challenges opportunities associated with future preparation anticipate that will shed new light on use

Язык: Английский

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Enhanced inactivation of Aspergillus niger biofilms by the combination of UV-LEDs with chlorine-based disinfectants

Water Research, Год журнала: 2024, Номер 267, С. 122451 - 122451

Опубликована: Сен. 15, 2024

Язык: Английский

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Research progress on fungi and their spore inactivation in different water bodies

Desalination and Water Treatment, Год журнала: 2025, Номер 321, С. 101007 - 101007

Опубликована: Янв. 1, 2025

Язык: Английский

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