Опубликована: Янв. 1, 2024
Язык: Английский
Environmental Science Atmospheres, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Organic peroxy radicals are critical to our understanding of atmospheric oxidation but difficult measure. We developed Cl 2 -CIMS, a reagent ion system for laboratory measurements select organic radicals.
Язык: Английский
Процитировано
0
Building and Environment, Год журнала: 2025, Номер unknown, С. 113097 - 113097
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
0
Environmental Science & Technology, Год журнала: 2025, Номер unknown
Опубликована: Май 14, 2025
Cleaning activities can affect indoor air composition long after the cleaning is completed. Utilizing data from detailed observational monitoring campaigns, conducted over 21 weeks, we explore influence of in two normally occupied, single-family houses. To study emissions and chemistry, quantified more than 200 volatile organic compounds (VOCs) using a proton-transfer reaction time-of-flight mass spectrometer 52 semivolatile (SVOCs) thermal-desorption gas chromatograph. During regular professional home cleaning, observed postcleaning concentration enhancements ∼60% measured VOCs ∼80% SVOCs. Most these were not clearly linked to either primary emission products or secondary formation through reactive chemistry. Instead, infer that shifts sorptive properties surfaces account for most observations. Cleaning-associated mostly ebbed within few hours, with some lower-volatility SVOCs persisting 5 h, longer would be expected removal inert species by ventilation. The use carpet cleaner was associated direct 2-butoxyethanol, which persisted at elevated concentrations days initial event. Home potentially relevant health cleaners residents.
Язык: Английский
Процитировано
0
Environmental Health Perspectives, Год журнала: 2024, Номер 132(7)
Опубликована: Июль 1, 2024
Scientists are scrambling to fill major research gaps about the types of pollutants released when wildfires burn not just vegetation, but also structures and vehicles-and how nearby residents can protect themselves.
Язык: Английский
Процитировано
2
ACS ES&T Air, Год журнала: 2024, Номер 1(2), С. 129 - 138
Опубликована: Янв. 25, 2024
Indoor surfaces become coated with a thin organic film that plays important roles in indoor chemistry. The sources for these films are to understand improve our ability model and predict the impacts of on air quality. However, majority measurements have focused semivolatile compounds. Here, we collected surface using solvent extractor enable characterization wider range chemicals present films. Surfaces sampled different academic buildings contain residues from cleaning solutions including both ionic non-ionic surfactants. These can be found smooth impermeable even after wiping solution off surface. may also potentially deposited farther away spraying because many spray applicator generates aerosols bimodal number size distribution. results demonstrate should considered contribute idea "cleaned surface" re-evaluated among laboratory studies, field models standpoint formation growth.
Язык: Английский
Процитировано
1
JAAD International, Год журнала: 2024, Номер 17, С. 181 - 191
Опубликована: Сен. 7, 2024
Язык: Английский
Процитировано
1
Indoor and Built Environment, Год журнала: 2024, Номер unknown
Опубликована: Сен. 11, 2024
This study utilized a questionnaire survey to collect data from 265 residents in Changchun, encompassing building characteristics, ventilation frequency and overall satisfaction with the indoor environment. Statistical analysis revealed significant disparities temperature. The results indicate that primary mode of air exchange amongst Changchun is window ventilation, accounting for 93%. Field tracking was conducted measure concentrations volatile organic compounds (VOCs) residential buildings during winter summer seasons. increase average indoor/outdoor (I/O) ratio targeted 25 VOC winter, rising 10.8 17.7. findings underscore sources as predominant contributors measured VOCs. Temperature, humidity room functions are main factors affecting concentration. Higher temperatures increased relative both contributed elevated levels. recommended opening more windows high temperature summer, maintain good quality effectively age emission VOCs furniture. contributes enhancement database on effective strategies cold regions safeguarding public health.
Язык: Английский
Процитировано
1
ACS ES&T Air, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 26, 2024
Wildfires are increasing in intensity and more often threatening the wildland urban interface (WUI) where buildings homes coexist with natural environment. WUI emissions have not been as well-studied from vegetation. Thus, there is a need to quantify of building materials used home construction under flaming smoldering conditions study their impacts human health, visibility, air quality, climate. Here, controlled laboratory setting, we aerosols trace gases including formaldehyde, particulate matter, black carbon. We focus on combustion traditional single-source wood-based fuels. Our results indicate that, similar fuels, aerosol optical properties were related than fuel type. Overall, observed significant variability gas particle emissions. Consistent trends include high formaldehyde (HCHO) carbon monoxide (CO) for higher dioxide (CO2), nitrogen oxides (NOx), conditions. These observations highlight better characterize built environment assess large-scale climate health fires at WUI.
Язык: Английский
Процитировано
1
ACS ES&T Air, Год журнала: 2024, Номер 2(1), С. 4 - 12
Опубликована: Дек. 23, 2024
Wildfires at the wildland–urban interface (WUI) have been increasing in frequency over recent decades due to increased human development and shifting climatic patterns. The work presented here focuses on impacts of a WUI fire indoor air using field measurements volatile organic compounds (VOCs) by Proton-Transfer-Reaction Time-of-Flight Mass Spectrometry (PTR-TOF-MS). We found slow decrease VOC mixing ratios course roughly 5 weeks starting 10 days after fire, those levels decreased ∼20% initial value average. composition could be described combination biomass burning emissions composition. Comparisons were made between polycyclic aromatic hydrocarbon (PAH) distributions gas phase ash, with differences observed their distribution each other when compared fresh fuel inventory measurements. Mitigation tests conducted running cleaners activated carbon opening windows promote indoor–outdoor exchange, both methods showing greater than 50% for average indoors while active. compare our results simulated smoke impact experiments that show decline VOCs must understood context reservoirs, beyond just surfaces, leading release air.
Язык: Английский
Процитировано
1
Building and Environment, Год журнала: 2024, Номер unknown, С. 112497 - 112497
Опубликована: Дек. 1, 2024
Язык: Английский
Процитировано
1