Active ozone removal technologies for a safe indoor environment: A comprehensive review

Namdari, Marzieh; Lee, Chang-Seo; Haghighat, Fariborz

doi:10.1016/j.buildenv.2020.107370

Cited by 69 publications

(35 citation statements)

References 109 publications

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“…o C1 to C10 saturated aldehydes (e.g., formaldehyde, acetaldehyde), acetone, and organic acids (Namdari et al 2021) is widely documented.…”

Section: Potential Harms Of Using Ozone Machines In Educational Settingsmentioning

confidence: 99%

“…• A further narrative review commented on the health effects regarding exposure to ozone in indoor settings (Namdari. et al 2021).…”

Section: Q3a: What Is the Effectiveness Of No-touch Automated Ozone D...mentioning

confidence: 99%

“…• Respiratory irritation (e.g., cough, shortness of breath) even at low levels (SAGE-EMG 2020a; Namdari et al 2021, US EPA 2021).…”

Section: Q4a: What Are the Potential Health Effects Of Ozone For Chil...mentioning

confidence: 99%

“…• Chest pain, respiratory inflammation, airway tissue damage, a decrease in lung function, deadening the sense of smell, eye irritation, headache, and exacerbation of respiratory diseases and cardiovascular problems (Namdari et al 2021, US EPA 2021.…”

Section: Q4a: What Are the Potential Health Effects Of Ozone For Chil...mentioning

confidence: 99%

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The efficacy, effectiveness and safety of SARS-CoV-2 disinfection methods (including ozone machines) in educational settings for children and young people

Edwards

Csontos

Gillen

et al. 2022

Preprint

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While evidence for the importance of transmission of SARS-CoV-2 from contaminated surfaces is limited, ozone disinfection methods have been considered for surface cleaning as a response to stopping the spread of the virus in educational settings. This rapid evidence summary aimed to search the available literature and summarise findings on the surface survival of SARS-CoV-2, efficacy and effectiveness of ozone machines against SARS-CoV-2, and benefits and harms caused by using these cleaning technologies, including their impact on health. Alternative cleaning technologies, such as light-based technologies and hydrogen peroxide vapour, were also investigated. Findings indicate that gaseous ozone can inactivate different bacteria and viruses, although there is a lack of direct evidence investigating the effect of these cleaning methods on SARS-CoV-2 in real-world settings, specifically in schools. However, regarding harm, ozone is a highly reactive oxidising agent, and high concentrations can contribute to decay of building materials, and health issues (mainly respiratory) by direct exposure or by-product formation. Therefore, leading environmental health organisations do not recommend the use of ozone cleaning technologies in real-world settings, such as schools. Research and policy focus may need to shift towards other interventions that could help reduce transmission, and consequently minimise disruption to education.

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“…o C1 to C10 saturated aldehydes (e.g., formaldehyde, acetaldehyde), acetone, and organic acids (Namdari et al 2021) is widely documented.…”

Section: Potential Harms Of Using Ozone Machines In Educational Settingsmentioning

confidence: 99%

“…• A further narrative review commented on the health effects regarding exposure to ozone in indoor settings (Namdari. et al 2021).…”

Section: Q3a: What Is the Effectiveness Of No-touch Automated Ozone D...mentioning

confidence: 99%

“…• Respiratory irritation (e.g., cough, shortness of breath) even at low levels (SAGE-EMG 2020a; Namdari et al 2021, US EPA 2021).…”

Section: Q4a: What Are the Potential Health Effects Of Ozone For Chil...mentioning

confidence: 99%

Section: Q4a: What Are the Potential Health Effects Of Ozone For Chil...mentioning

confidence: 99%

See 2 more Smart Citations

The efficacy, effectiveness and safety of SARS-CoV-2 disinfection methods (including ozone machines) in educational settings for children and young people

Edwards

Csontos

Gillen

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Ozone in the outdoor air can infiltrate into indoor environments. Indoor ozone is considered more harmful than outdoor ozone because modern humans spend most of their time indoors ( Abbass et al, 2017 ; Namdari et al, 2021 ; Nazaroff and Weschler 2021 ). The development of environmental technologies to effectively eliminate ozone is therefore necessary.…”

Section: Introductionmentioning

confidence: 99%

Core-Shell-Like Structured Co3O4@SiO2 Catalyst for Highly Efficient Catalytic Elimination of Ozone

et al. 2021

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Co3O4 is an environmental catalyst that can effectively decompose ozone, but is strongly affected by water vapor. In this study, Co3O4@SiO2 catalysts with a core-shell-like structure were synthesized following the hydrothermal method. At 60% relative humidity and a space velocity of 720,000 h−1, the prepared Co3O4@SiO2 obtained 95% ozone decomposition for 40 ppm ozone after 6 h, which far outperformed that of the 25wt% Co3O4/SiO2 catalysts. The superiority of Co3O4@SiO2 is ascribed to its core@shell structure, in which Co3O4 is wrapped inside the SiO2 shell structure to avoid air exposure. This research provides important guidance for the high humidity resistance of catalysts for ozone decomposition.

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Rapid Ozone Decomposition over Water‐activated Monolithic MoO₃/Graphdiyne Nanowalls under High Humidity

Zhu

Yang

et al. 2023

Angewandte Chemie

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Catalytic ozone (O3) decomposition at high relative humidity (RH) remains a great challenge due to the catalysts poison and deactivation under high humidity. Here, we firstly elaborate the role of water activation and the corresponding mechanism of the promoted O3 decomposition over the three‐dimensional monolithic molybdenum oxide/graphdiyne (MoO3/GDY) catalyst. The O3 decomposition over MoO3/GDY reaches up to 100% under high humid condition (75% RH) at room temperature, which is 4.0 times as high as that of dry conditions, significantly surpasses other carbon‐based MoO3 materials(≤ 7.1%). The sp‐hybridized carbon in GDY donates electrons to MoO3 along the C‐O‐Mo bond, facilitating water activation to form hydroxyl species. As a result, hydroxyl species dissociated from water act as new active sites, promoting the adsorption of O3 and the generation of new intermediate species (hydroxyl ⋅OH and superoxo ⋅O2−), which significantly lowers the energy barriers of O3 decomposition (0.57 eV lower than dry conditions).

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Active ozone removal technologies for a safe indoor environment: A comprehensive review

Cited by 69 publications

References 109 publications

The efficacy, effectiveness and safety of SARS-CoV-2 disinfection methods (including ozone machines) in educational settings for children and young people

The efficacy, effectiveness and safety of SARS-CoV-2 disinfection methods (including ozone machines) in educational settings for children and young people

Core-Shell-Like Structured Co3O4@SiO2 Catalyst for Highly Efficient Catalytic Elimination of Ozone

Rapid Ozone Decomposition over Water‐activated Monolithic MoO₃/Graphdiyne Nanowalls under High Humidity

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Active ozone removal technologies for a safe indoor environment: A comprehensive review

Cited by 69 publications

References 109 publications

The efficacy, effectiveness and safety of SARS-CoV-2 disinfection methods (including ozone machines) in educational settings for children and young people

The efficacy, effectiveness and safety of SARS-CoV-2 disinfection methods (including ozone machines) in educational settings for children and young people

Core-Shell-Like Structured Co3O4@SiO2 Catalyst for Highly Efficient Catalytic Elimination of Ozone

Rapid Ozone Decomposition over Water‐activated Monolithic MoO3/Graphdiyne Nanowalls under High Humidity

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Product

Resources

About

Rapid Ozone Decomposition over Water‐activated Monolithic MoO₃/Graphdiyne Nanowalls under High Humidity