Emerging investigator series: The gas phase ozonolysis and secondary OH production of cashmeran, a musk compound from fragrant volatile chemical products DOI
Ayomide A. Akande, Nadine Borduas‐Dedekind

Environmental Science Processes & Impacts, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Fragrant personal care products are a subset of volatile chemical (VCPs), an emerging source outdoor pollutants capable impacting air quality. molecules, such as musks, used in perfumes and have been found aquatic organisms, water bodies, indoor air, urban environments. Considering the distribution musk-smelling compounds, there is need to constrain their atmospheric fate indoors outdoors. Here, we Vocus proton-transfer-reaction time-of-flight mass spectrometer quantify oxidative cashmeran, bicyclic musk compound, detected commercial perfume alongside galaxolide, astratone rosamusk. Cashmeran concentrations rose up 0.35 ppbv representing yield 0.33 ± 0.04% perfume. We determined second order rate constant cyclo-addition O

Language: Английский

Chemical Transformations of Infiltrated Wildfire Smoke on Indoor-Relevant Surfaces DOI Creative Commons
Cholaphan Deeleepojananan, Shubhrangshu Pandit, Jienan Li

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Indoor environments are affected during wildfire events due to the infiltration of smoke. In this study, fate smoke, including gases and particles, on indoor surfaces was investigated through laboratory field experiments. Fresh smoke generated from burning ponderosa pine woodchips, which produced well-established biomass tracers, such as levoglucosan, 3-methyl-1,2,3-butanetricarboxylic acid (MBTCA), 5-hydroxymethylfurfural. The interactions particles were observed different indoor-relevant building material surfaces, glass (windows), rutile (paint self-cleaning surfaces), kaolinite (cement proxy clay). However, relative abundance surface-bound species varied depending nature these suggesting that preferential adsorption volatile particle deposition onto relevant play a key role in chemistry air quality following intrusion. Kaolinite particular, exhibited formation surface-initiated products fresh exposure. Furthermore, larger surface ozone-aged exposure, potentially resulting interaction secondary organic aerosol formed ozonolysis. Overall, study demonstrates interact uniquely with compounds, leading distinct chemical transformations.

Language: Английский

Citations

0
The Role of Indoor Surface pH in Controlling the Fate of Acids and Bases in an Unoccupied Residence DOI
Jenna C. Ditto,

Marc Webb,

Han N. Huynh

et al.

ACS ES&T Air, Journal Year: 2024, Volume and Issue: 1(9), P. 1015 - 1027

Published: July 18, 2024

The chemical composition of indoor air is strongly driven by the and properties surfaces. At Chemical Assessments Surfaces Air (CASA) campaign, we performed controlled additions ammonia (reaching up to 297 ppb 662 ppb) investigate impacts changing surface basicity on fate gaseous particulate acids bases in an unoccupied house. In response injections, nitrogen-containing compounds (C2–7H3–11N1O0–3) were emitted from surfaces gas phase with signals increasing 101% 104% compared their prior addition. same time, oxygen-containing (C1–7H2–6O2–3) removed partitioning. Indoor pH aerosol likely increased during these injections relative baseline conditions. We estimate be nearly 5 range 2 4 this experiment. each injection, observed ammonium nitrate concentrations increase due gas-particle partitioning nitric acid. This gas-particle-surface exchange showed strong dependence humidity; evaporation was more pronounced at lower humidity when surface-associated water volume reduced, while gas-to-particle inorganic species greater presence liquid higher humidity. From cooking experiments, which represent realistic sources environment but emit 10 times less than introduced house via pure injection predict that may still important basic gases air.

Language: Английский

Citations

2
VOC Emission Rates from an Indoor Surface Using a Flux Chamber and PTR-MS DOI Creative Commons
Han N. Huynh, Jenna C. Ditto, Jie Yu

et al.

Atmospheric Environment, Journal Year: 2024, Volume and Issue: 338, P. 120817 - 120817

Published: Sept. 12, 2024

Language: Английский

Citations

1
Speciating volatile organic compounds in indoor air: using in-situ GC to interpret real-time PTR-MS signals DOI Creative Commons
Jenna C. Ditto, Han N. Huynh, Jie Yu

et al.

Environmental Science Processes & Impacts, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

Gas chromatography paired with proton transfer reaction mass spectrometry allows for a more accurate assessment of gas-phase chemicals in indoor air.

Language: Английский

Citations

1
Impacts of Aging and Relative Humidity on Properties of Biomass Burning Smoke Particles DOI Creative Commons

Sofie K. Schwink,

Liora E. Mael,

Thomas H. Dunnington

et al.

ACS ES&T Air, Journal Year: 2024, Volume and Issue: 2(1), P. 109 - 118

Published: Dec. 6, 2024

Quantifying changes in the properties of smoke aerosols under varying conditions is important for understanding health and environmental impacts exposure to smoke. Smoke composition, aerosol liquid water content, effective density (ρeff), other can change significantly as travels through areas different ambient over time. During this study, we measured composition physical due oxidative aging humidity. We found that led SOA formation increases ratios organic carbon elemental carbon. Aerosol content increased with increasing relative humidity (RH), aged took up more than fresh at all levels, likely a combination surface polarity low medium RH area high RH. Growth factors ranged from 1.06 ± 0.08 1.32 Oxidative ρeff. For 100 nm particles, ρeff ∼1.2 ∼1.6 Results these experiments suggest leads restructuring compaction and/or chemistry.

Language: Английский

Citations

1
Commercial kitchen operations produce a diverse range of gas-phase reactive nitrogen species DOI
Leigh R. Crilley, Jenna C. Ditto, Melodie Lao

et al.

Environmental Science Processes & Impacts, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Gas phase reactive nitrogen (N r ) species in a commercial kitchen are mainly composed of expected with many additional completing the budget.

Language: Английский

Citations

0
Emerging investigator series: The gas phase ozonolysis and secondary OH production of cashmeran, a musk compound from fragrant volatile chemical products DOI
Ayomide A. Akande, Nadine Borduas‐Dedekind

Environmental Science Processes & Impacts, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Fragrant personal care products are a subset of volatile chemical (VCPs), an emerging source outdoor pollutants capable impacting air quality. molecules, such as musks, used in perfumes and have been found aquatic organisms, water bodies, indoor air, urban environments. Considering the distribution musk-smelling compounds, there is need to constrain their atmospheric fate indoors outdoors. Here, we Vocus proton-transfer-reaction time-of-flight mass spectrometer quantify oxidative cashmeran, bicyclic musk compound, detected commercial perfume alongside galaxolide, astratone rosamusk. Cashmeran concentrations rose up 0.35 ppbv representing yield 0.33 ± 0.04% perfume. We determined second order rate constant cyclo-addition O

Language: Английский

Citations

0