Influence of indoor environmental factors on mass transfer parameters and concentrations of semi-volatile organic compounds

Wei, Wenjuan; Mandin, Corinne; Ramalho, Olivier

doi:10.1016/j.chemosphere.2017.12.072

Cited by 63 publications

(46 citation statements)

References 132 publications

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“…126,127 This discrepancy can be attributed in part to enhanced species partitioning from surface films to the gas-phase, which is driven by changes to gas-phase concentration gradients at the surface boundary layer. 135,137,138 Additionally, in a competing effect, increased AERs can promote higher near-surface air velocities, which increase gas-to-surface mass transfer coefficients and therefore drive gas-phase pollutant concentrations down. [138][139][140] The data obtained in this study reflect a strong enhancement effect for many gas-phase pollutants, particularly for S/IVOCs measured with the TAG.…”

Section: Enhanced Emission Of Indoor Speciesmentioning

confidence: 99%

“…135,137,138 Additionally, in a competing effect, increased AERs can promote higher near-surface air velocities, which increase gas-to-surface mass transfer coefficients and therefore drive gas-phase pollutant concentrations down. [138][139][140] The data obtained in this study reflect a strong enhancement effect for many gas-phase pollutants, particularly for S/IVOCs measured with the TAG. Therefore, for these compounds, we expect that increases in vertical concentration gradients with increased AER are the predominant drivers for changes in emission rates.…”

Section: Enhanced Emission Of Indoor Speciesmentioning

confidence: 99%

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Analysis of indoor particles and gases and their evolution with natural ventilation

et al. 2019

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Although people in developed nations spend up to 90% of their time indoors, 1,2 the chemistry and composition of indoor air remain understudied, especially compared to the outdoor environment. 3 Evaluating air quality in residential dwellings is particularly important for several reasons. First, although building standards (eg, for minimum air change rates and moisture control) have been established over the past several decades, 4,5 many residential structures fail to meet these standards, especially older buildings. Newer buildings, designed to minimize outdoor-to-indoor infiltration for improved energy efficiency, often have higher concentrations of airborne pollutants that are released indoors from materials and activities. 6,7 Concentrations and composition AbstractThe air composition and reactivity from outdoor and indoor mixing field campaign was conducted to investigate the impacts of natural ventilation (ie, window opening and closing) on indoor air quality. In this study, a thermal desorption aerosol gas chromatograph (TAG) obtained measurements of indoor particle-and gas-phase semi-and intermediately volatile organic compounds both inside and outside a single-family test home. Together with measurements from a suite of instruments, we use TAG data to evaluate changes in indoor particles and gases at three natural ventilation periods. Positive matrix factorization was performed on TAG and adsorbent tube data to explore five distinct chemical and physical processes occurring in the indoor environment. Outdoor-to-indoor transport is observed for sulfate, isoprene epoxydiols, polycyclic aromatic hydrocarbons, and heavy alkanes. Dilution of indoor species is observed for volatile, non-reactive species including methylcyclohexane and decamethylcyclopentasiloxane. Window opening drives enhanced emissions of semi-and intermediately volatile species including TXIB, DEET, diethyl phthalate, and carvone from indoor surfaces. Formation via enhanced oxidation was observed for nonanal and 2-decanone when outdoor oxidants entered the home. Finally, oxidative depletion of gas-phase terpenes (eg, limonene and α-pinene) was anticipated but not observed due to limited measurement resolution and dynamically changing conditions. K E Y W O R D Sfield measurements, gas chromatography-mass spectrometry, gas-particle partitioning, natural ventilation, residential air quality, semivolatile organic compounds

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Section: Enhanced Emission Of Indoor Speciesmentioning

confidence: 99%

Section: Enhanced Emission Of Indoor Speciesmentioning

confidence: 99%

Analysis of indoor particles and gases and their evolution with natural ventilation

et al. 2019

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“…Some prior studies show that temperature may exert a large influence on the concentrations of SVOCs in indoor environments. Theory as well as laboratory‐controlled studies predict increased emissions from indoor sources (eg, building materials) to indoor air at elevated temperatures . In addition, model simulation and chamber studies on specific SVOCs have shown that enhanced particle mass loading could facilitate partitioning of gaseous SVOCs in airborne particles, thus altering the SVOC distribution and exposure .…”

Section: Introductionmentioning

confidence: 99%

“…Theory as well as laboratory-controlled studies predict increased emissions from indoor sources (eg, building materials) to indoor air at elevated temperatures. [27][28][29][30][31][32][33][34][35] In addition, model simulation and chamber studies on specific SVOCs have shown that enhanced particle mass loading could facilitate partitioning of gaseous SVOCs in airborne particles, thus altering the SVOC distribution and exposure. [36][37][38][39] Until now, however, no studies have documented the influence of temperature and particle mass loading on the indoor air SVOC concentrations in real indoor environments under normal occupancy, thus restricting efforts to validate models for indoor environmental emissions, fates, and gas/particle distributions of SVOCs and associated human exposures.…”

mentioning

confidence: 99%

“…[36][37][38][39] Until now, however, no studies have documented the influence of temperature and particle mass loading on the indoor air SVOC concentrations in real indoor environments under normal occupancy, thus restricting efforts to validate models for indoor environmental emissions, fates, and gas/particle distributions of SVOCs and associated human exposures. 35,36,40,41 Furthermore, the influence of human occupants on the dynamic behavior and chemical composition of SVOCs indoors remains poorly characterized. The roles of human occupants influencing indoor chemistry have been reviewed by Weschler 42 To address these important gaps in knowledge, we report here the gas/particle distribution, dynamic behavior, and chemical composition of indoor air organic compounds in a San Francisco Bay Area residence during normal occupancy.…”

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Sources and dynamics of semivolatile organic compounds in a single‐family residence in northern California

et al. 2019

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Semivolatile organic compounds (SVOCs) emitted from building materials, consumer products, and occupant activities alter the composition of air in residences where people spend most of their time. Exposures to specific SVOCs potentially pose risks to human health. However, little is known about the chemical complexity, total burden, and dynamic behavior of SVOCs in residential environments. Furthermore, little is known about the influence of human occupancy on the emissions and fates of SVOCs in residential air. Here, we present the first‐ever hourly measurements of airborne SVOCs in a residence during normal occupancy. We employ state‐of‐the‐art semivolatile thermal‐desorption aerosol gas chromatography (SV‐TAG). Indoor air is shown consistently to contain much higher levels of SVOCs than outdoors, in terms of both abundance and chemical complexity. Time‐series data are characterized by temperature‐dependent elevated background levels for a broad suite of chemicals, underlining the importance of continuous emissions from static indoor sources. Substantial increases in SVOC concentrations were associated with episodic occupant activities, especially cooking and cleaning. The number of occupants within the residence showed little influence on the total airborne SVOC concentration. Enhanced ventilation was effective in reducing SVOCs in indoor air, but only temporarily; SVOCs recovered to previous levels within hours.

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The Full Chain Model: Linking Chemical Exposure from Indoor Sources to Human Health Effects

Preece

Shu

Bornehag

2022

Handbook of Indoor Air Quality

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Influence of indoor environmental factors on mass transfer parameters and concentrations of semi-volatile organic compounds

Cited by 63 publications

References 132 publications

Analysis of indoor particles and gases and their evolution with natural ventilation

Analysis of indoor particles and gases and their evolution with natural ventilation

Sources and dynamics of semivolatile organic compounds in a single‐family residence in northern California

The Full Chain Model: Linking Chemical Exposure from Indoor Sources to Human Health Effects

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