Characterization of organic release kinetics in particleboard using a dual model fitting methodology DOI Creative Commons
Guodong Yuan,

Huiwen Yuan,

Yingfeng Zhao

и другие.

RSC Advances, Год журнала: 2023, Номер 13(47), С. 33446 - 33452

Опубликована: Янв. 1, 2023

In modern society, people spend most of their time indoors engaging in work and home life. However, indoor air pollution is a potential risk to health, it associated with many diseases. Wooden furniture, as the popular furniture used times, major source pollution, so has become imperative explore composition release kinetics characteristics toxic hazardous substances from wood-based panels. this study, thermal desorption-gas chromatography-mass spectrometry (TD-GC-MS) was detect organic compounds wood panels, determine dimethyl acetal, phenol, toluene decanoic acid via bi-exponential mass transfer models provide theoretical basis for targeted prevention control. project, climate chamber method conduct 120 h continuous sampling concentration The TD-GC-MS analyze tubes, concentration-time data were fitted models. emission factor equation obtained model. critical physical parameters, such initial internal C0, diffusion rate Dm, solid-phase/gas-phase partition coefficient K, Finally, found that acetal easily rapidly released into air, while phenol slowly ambient air. two sets an essential control, well methodological path studying different substances.

Язык: Английский

Indoor Air Quality Implications of Germicidal 222 nm Light DOI Creative Commons
Victoria P. Barber, Matthew B. Goss,

Lesly J. Franco Deloya

и другие.

Environmental Science & Technology, Год журнала: 2023, Номер 57(42), С. 15990 - 15998

Опубликована: Окт. 12, 2023

One strategy for mitigating the indoor transmission of airborne pathogens, including SARS-CoV-2 virus, is irradiation by germicidal UV light (GUV). A particularly promising approach 222 nm from KrCl excimer lamps (GUV

Язык: Английский

Процитировано

29
The persistence of smoke VOCs indoors: Partitioning, surface cleaning, and air cleaning in a smoke-contaminated house DOI Creative Commons
Jienan Li, Michael F. Link, Shubhrangshu Pandit

и другие.

Science Advances, Год журнала: 2023, Номер 9(41)

Опубликована: Окт. 13, 2023

Wildfires are increasing in frequency, raising concerns that smoke can permeate indoor environments and expose people to chemical air contaminants. To study transformations evaluate mitigation strategies, we added a test house. Many volatile organic compounds (VOCs) persisted days following the injection, providing longer-term exposure pathway for humans. Two time scales control VOC partitioning: faster one (1.0 5.2 hours) describes reach equilibrium between adsorption desorption processes slower (4.8 21.2 ventilation overtake adsorption-desorption equilibria controlling concentration. These rates imply vapor pressure controls partitioning behavior house plays minor role removing VOCs. However, surface cleaning activities (vacuuming, mopping, dusting) physically removed reservoirs thus reduced concentrations more effectively than portable cleaners persistently window opening.

Язык: Английский

Процитировано

25
The Impact of Indoor Environments on the Abundance of Urban Outdoor VOCs DOI
Li Zhou,

Xiaoqiao Jiao,

Bo Yang

и другие.

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Март 10, 2025

With the upcoming transition to clean electric vehicles, sources of volatile organic compounds (VOCs) in ambient environment are rapidly changing and highly uncertain. Here, through systematic characterization emissions from a typical apartment Chinese megacity (Shenzhen), we show that indoor environments contribute significantly levels (i.e., outdoor) VOCs. In particular, observe majority VOCs originate unoccupied spaces, demonstrating temperature-dependent release surface reservoirs. The total indoor-to-outdoor VOC emission rates varied 53 2300 mg day–1 (median 230 day–1) during periods, influenced by both air exchange rate temperature. Reanalysis literature data various building studies worldwide corroborates our findings reveals scale with room volume, an average 0.33 ± 0.03 h–1 m–3. Our study implies urban levels, rivaling traditional sources, e.g., power generation biomass burning. This is particularly true for oxygenated VOCs, such as methanol, amounting ∼60% transportation emissions. change understanding role contributions outdoor quality, whose importance will increase controls on industrial intensify.

Язык: Английский

Процитировано

1
Model Evaluation of Secondary Chemistry due to Disinfection of Indoor Air with Germicidal Ultraviolet Lamps DOI Creative Commons
Zhe Peng, Shelly L. Miller, J. L. Jiménez

и другие.

Environmental Science & Technology Letters, Год журнала: 2022, Номер 10(1), С. 6 - 13

Опубликована: Дек. 2, 2022

Air disinfection using germicidal ultraviolet light (GUV) has received increasing attention during the COVID-19 pandemic. GUV uses UVC lamps to inactivate microorganisms, but it also initiates photochemistry in air. However, GUV's indoor-air-quality impact not been investigated detail. Here, we model chemistry initiated by at 254 ("GUV254") or 222 nm ("GUV222") a typical indoor setting for different ventilation levels. Our analysis shows that GUV254, usually installed upper room, can significantly photolyze O3, generating OH radicals oxidize volatile organic compounds (VOCs) into more oxidized VOCs. Secondary aerosol (SOA) is formed as VOC-oxidation product. GUV254-induced SOA formation of order 0.1–1 μg/m3 cases studied here. GUV222 (described some harmless humans and thus applicable whole room) with same effective virus-removal rate makes smaller mid-to-high rates. This mainly because lower UV irradiance needed less efficient OH-generating O3 photolysis than GUV254. higher GUV254 under poor due small significant photochemical production nm, which does occur

Язык: Английский

Процитировано

37
Indoor and outdoor air quality impacts of cooking and cleaning emissions from a commercial kitchen DOI
Jenna C. Ditto, Leigh R. Crilley, Melodie Lao

и другие.

Environmental Science Processes & Impacts, Год журнала: 2023, Номер 25(5), С. 964 - 979

Опубликована: Янв. 1, 2023

Online gas- and particle-phase measurements in a commercial kitchen reveal exposure risks outdoor air impacts during cooking cleaning.

Язык: Английский

Процитировано

18
The Chemical Assessment of Surfaces and Air (CASA) Study: Using chemical and physical perturbations in a test house to investigate indoor processes DOI Creative Commons
Delphine K. Farmer, Marina E. Vance, Dustin G. Poppendieck

и другие.

Environmental Science Processes & Impacts, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

The Chemical Assessment of Surfaces and Air (CASA) study aimed to understand how chemicals transform in the indoor environment using perturbations (

Язык: Английский

Процитировано

8
Detailed Investigation of the Contribution of Gas-Phase Air Contaminants to Exposure Risk during Indoor Activities DOI Creative Commons
Anna L. Hodshire, Ellison Carter, James M. Mattila

и другие.

Environmental Science & Technology, Год журнала: 2022, Номер 56(17), С. 12148 - 12157

Опубликована: Авг. 11, 2022

Analytical capabilities in atmospheric chemistry provide new opportunities to investigate indoor air. HOMEChem was a chemically comprehensive field campaign designed how common activities, such as cooking and cleaning, impacted air test home. We combined gas-phase chemical data of all compounds, excluding those with concentrations <1 ppt, established databases health effect thresholds evaluate potential risks associated contaminants activities. The composition is distinct from outdoor air, gaseous compounds present at higher levels greater diversity─and thus predicted hazard quotients─indoors than outdoors. Common household activities like cleaning induce rapid changes composition, raising multiple high risk quotients. highlight strongly human influence the we breathe built environment, increasing exposure contaminants.

Язык: Английский

Процитировано

26
Ozone generation and chemistry from 222 nm germicidal ultraviolet light in a fragrant restroom DOI
Michael F. Link,

Rileigh L. Robertson,

Andrew Shore

и другие.

Environmental Science Processes & Impacts, Год журнала: 2024, Номер 26(6), С. 1090 - 1106

Опубликована: Янв. 1, 2024

Devices using 222 nm germicidal ultraviolet light (GUV222) have been marketed to reduce virus transmission indoors. However, GUV222 generates ozone which can react with gases and surfaces create undesirable air byproducts.

Язык: Английский

Процитировано

6
Ventilation in a Residential Building Brings Outdoor NOx Indoors with Limited Implications for VOC Oxidation from NO3 Radicals DOI
Michael F. Link, Jienan Li, Jenna C. Ditto

и другие.

Environmental Science & Technology, Год журнала: 2023, Номер 57(43), С. 16446 - 16455

Опубликована: Окт. 19, 2023

Energy-efficient residential building standards require the use of mechanical ventilation systems that replace indoor air with outdoor air. Transient pollution events can be transported indoors via system and other entry pathways impact chemistry. In spring 2022, we observed elevated levels NOx (NO + NO2) originated outdoors, entering National Institute Standards Technology (NIST) Net-Zero Energy Residential Test Facility through system. Using measurements NOx, ozone (O3), volatile organic compounds (VOCs), modeled effect outdoor-to-indoor on production nitrate radical (NO3), a potentially important oxidant. We evaluated how VOC oxidation chemistry was affected by NO3 during compared to background conditions. found nitric oxide (NO) introduced titrated O3 inhibited NO3. NO ventilated also likely ceased most gas-phase plume events. Only artificial introduction duct event (i.e., when NO2 concentrations were high relative typical conditions) able measure NO3-initiated products, indicating impacting

Язык: Английский

Процитировано

13
Indoor cooking and cleaning as a source of outdoor air pollution in urban environments DOI Creative Commons
Toby J. Carter, David R. Shaw, David C. Carslaw

и другие.

Environmental Science Processes & Impacts, Год журнала: 2024, Номер 26(6), С. 975 - 990

Опубликована: Янв. 1, 2024

Common household activities including cooking and cleaning contribute to indoor air pollution. Here, a modelling study has been conducted identify how these sources of pollution affect outdoor environments.

Язык: Английский

Процитировано

3