Indoor ozone: Concentrations and influencing factors

Indoor Air, Journal Year: 2021, Volume and Issue: 32(1)

Published: Oct. 5, 2021

Because people spend most of their time indoors, much exposure to ozone occurs in buildings, which are partially protective against outdoor ozone. Measurements approximately 2000 indoor environments (residences, schools, and offices) show a central tendency for average concentration 4-6 ppb an ratio about 25%. Considerable variability this exists among as influenced by seven building-associated factors: removal mechanical ventilation systems, penetration through the building envelope, air-change rates, loss rate on fixed surfaces, human occupants, homogeneous reaction with nitrogen oxides, gas-phase organics. Among these, important and, densely occupied spaces, occupants. Although originates outdoors enters air, emission sources can materially increase concentrations. Mitigation technologies reduce concentrations available or being investigated. The mature these technologies, activated carbon filtration supply shows high modeled health-benefit cost when applied spaces.

Language: Английский

---

Highly efficient ozone decomposition against harsh environments over long-term stable amorphous MnOx catalysts

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 315, P. 121552 - 121552

Published: May 26, 2022

Language: Английский

---

Exceptional Ozone Decomposition over δ-MnO₂/AC under an Entire Humidity Environment

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(46), P. 17727 - 17736

Published: March 2, 2023

Ozone (O3) pollution is highly detrimental to human health and the ecosystem due it being ubiquitous in ambient air industrial processes. Catalytic decomposition most efficient technology for O3 elimination, while moisture-induced low stability represents major challenge its practical applications. Here, activated carbon (AC) supported δ-MnO2 (Mn/AC-A) was facilely synthesized via mild redox an oxidizing atmosphere obtain exceptional capacity. The optimal 5Mn/AC-A achieved nearly 100% of at a high space velocity (1200 L g-1 h-1) remained extremely stable under entire humidity conditions. functionalized AC provided well-designed protection sites inhibit accumulation water on δ-MnO2. Density functional theory (DFT) calculations confirmed that abundant oxygen vacancies desorption energy intermediate peroxide (O22-) can significantly boost activity. Moreover, kilo-scale with cost (∼1.5 $/kg) used applications, which could quickly decompose safety level below 100 μg m-3. This work offers simple strategy development moisture-resistant inexpensive catalysts greatly promotes application elimination.

Language: Английский

---

Creating water-resistant oxygen vacancies in δ-MnO2 by chlorine introduction for catalytic ozone decomposition at ambient temperature

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 335, P. 122900 - 122900

Published: May 22, 2023

Language: Английский

---

Efficient deactivation of aerosolized pathogens using a dielectric barrier discharge based cold-plasma detergent in environment device for good indoor air quality

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: June 25, 2023

Abstract Air pollution is one of the top 5 risks causing chronic diseases according to WHO and airborne transmitted pathogens infection a huge challenge in current era. Long living small size aerosols are not effectively dealt with by available indoor air purifiers. In this work, dielectric barrier discharge (DBD) based portable cold-plasma detergent environment device reported its disinfection efficiency has been analyzed sizes up 3 × 2.4 m . The deactivation total microbial counts (TMCs) fungal (TFCs) found be more than 99% 90 min continuous operation at optimized parameters. complete inactivation MS2 phage Escherichia coli bacteria log reduction (99.999%) also achieved 30 an enclosed environment. able produce negative ions predominantly dominated natural plasma along positive similar mother nature. comprises coaxial DBD geometry source specially designed wire mesh electrode mild steel thickness 1 mm. need for feed gas, pellets and/or differential pressure eliminated from efficient purification. existence 25 s on average key advantage, which can deactivate long aerosols.

Language: Английский

---

One-step synthesis of sludge-derived MnOx catalysts for highly efficient removal of gaseous ozone from industrial flue gas

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 345, P. 123696 - 123696

Published: Jan. 2, 2024

Language: Английский

---

To enhance water resistance for catalytic ozone decomposition by fabricating H2O adsorption-site in OMS-2 tunnels

Applied Catalysis B Environment and Energy, Journal Year: 2021, Volume and Issue: 297, P. 120466 - 120466

Published: June 16, 2021

Language: Английский

---

A recent progress of room–temperature airborne ozone decomposition catalysts

Chinese Chemical Letters, Journal Year: 2021, Volume and Issue: 32(10), P. 2985 - 2993

Published: March 18, 2021

Language: Английский

---

Ozonation: an Evolving Disinfectant Technology for the Food Industry

Food and Bioprocess Technology, Journal Year: 2022, Volume and Issue: 15(9), P. 2102 - 2113

Published: July 15, 2022

Language: Английский

---

Efficient ozone decomposition over bifunctional Co3Mn-layered double hydroxide with strong electronic interaction

Chinese Chemical Letters, Journal Year: 2022, Volume and Issue: 33(10), P. 4679 - 4682

Published: Jan. 16, 2022

Language: Английский

---