Published: Jan. 1, 2024
Language: Английский
Environmental Health Perspectives, Journal Year: 2024, Volume and Issue: 132(7)
Published: July 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.
Language: Английский
Citations
2
ACS ES&T Air, Journal Year: 2024, Volume and Issue: 1(2), P. 129 - 138
Published: Jan. 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.
Language: Английский
Citations
1
JAAD International, Journal Year: 2024, Volume and Issue: 17, P. 181 - 191
Published: Sept. 7, 2024
Language: Английский
Citations
1
Atmospheric Environment, Journal Year: 2024, Volume and Issue: 338, P. 120817 - 120817
Published: Sept. 12, 2024
Language: Английский
Citations
1
ACS ES&T Air, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 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.
Language: Английский
Citations
1
Journal of Allergy and Clinical Immunology, Journal Year: 2024, Volume and Issue: 154(4), P. 861 - 873
Published: Aug. 14, 2024
Language: Английский
Citations
1
ACS ES&T Air, Journal Year: 2024, Volume and Issue: 2(1), P. 4 - 12
Published: Dec. 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.
Language: Английский
Citations
1
Atmosphere, Journal Year: 2023, Volume and Issue: 14(12), P. 1729 - 1729
Published: Nov. 24, 2023
Sub-micron particles are ubiquitous in the indoor environment, especially during wildfire smoke episodes, and have a higher impact on human health than larger particles. Conventional fibrous air filters installed heating, ventilation, conditioning (HVAC) systems play an important role controlling quality by removing various pollutants, including particulate matter (PM). However, it is evident that removal efficiency of PM its effect filter performance significantly under-studied. This study delves into size-specific pine needle smoke, representative emissions. We test array media with minimum reporting values (MERV) spanning 11–15. Both size-resolved particle number concentrations mass were measured using Optical Particle Sizer (OPS, TSI, Inc.) Scanning Mobility (SMPS, Inc.). Furthermore, we characterize morphology deposited fibers Electron Microscopy (SEM) to gain insights interaction dynamics these Our findings add comprehension relationship between MERV designations efficiency. Such insight can inform standards guidelines equip decision-makers knowledge needed initiate measures for mitigating pollution, specifically environment.
Language: Английский
Citations
2
Indoor and Built Environment, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 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.
Language: Английский
Citations
0
Sustainable Cities and Society, Journal Year: 2024, Volume and Issue: unknown, P. 105867 - 105867
Published: Sept. 1, 2024
Language: Английский
Citations
0