Modeling and analysis of sampling artifacts in measurements of gas-particle partitioning of semivolatile organic contaminants using filter-sorbent samplers

Wang, Xinke; Bi, Chenyang; Xu, Ying

doi:10.1016/j.atmosenv.2015.06.053

Cited by 18 publications

(4 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, at a flow rate of 0.50 L/ min per wire mesh tube, the DEHP gas penetration rate was approximately 7.4% (93% DEHP gas removal efficiency). As the removal efficiency of the same DT in the previous study 37 was approximately 90%, the DT used in this study exhibited a suitable removal performance because the measured removal efficiencies were equal to the theoretical DT penetration rate determined by the Gormley and Kennedy equation 38 shown in Figure 6 (DEHP gas diffusion coefficient was equal to that of one 10 nm particle; D = 4.0 9 10 À6 m 2 /s). 39 Figure 6 also shows the theoretical diffusion coefficients for 10 and 100 nm particles for comparison.…”

Section: Examination Of the Separation Sampling Methods Of Svoc Gas Anmentioning

confidence: 54%

Study on the mechanism of SVOC adsorption onto airborne particles in indoor air

Kondo

Kagi

Namiki

2018

Japan Architectural Review

View full text Add to dashboard Cite

Semi‐volatile organic compounds (SVOC), such as di‐2‐ethylhexyl phthalate (DEHP), not only cause chemical sensitivity but can also trigger asthma. SVOCs are adsorbed onto airborne particles as well as gas‐phase molecules in indoor air, owing to their low vapor pressure. Therefore, 3 models are suggested to evaluate partitioning between the gaseous and particulate phases using data from previous studies. In this study, the characteristics of each model were extracted, and the mechanisms of DEHP adsorption onto test airborne particles were investigated under controlled temperature, airborne test particle concentration, and air exchange rate conditions in a chamber. The total DEHP concentration increased from 1.6 to 25.6 μg/m3 as the chamber temperature increased from 15 to 35°C. However, the particulate DEHP ratio φ decreased with the increase in temperature. The high airborne particle concentration caused an increase in the particulate DEHP concentration. Moreover, the estimates based on the Junge model corresponded well with the results of these experiments, whereas the Mackay and Pankow models overestimated the values of φ compared to the results of these experiments. These results indicate that particulate surface concentration is related to the DEHP adsorption mechanism onto airborne particles.

show abstract

Section: Examination Of the Separation Sampling Methods Of Svoc Gas Anmentioning

confidence: 54%

Study on the mechanism of SVOC adsorption onto airborne particles in indoor air

Kondo

Kagi

Namiki

2018

Japan Architectural Review

View full text Add to dashboard Cite

show abstract

“…This assumption is appropriate since our methodology incorporated rinsing of WBs to remove particles prior analysis as well as collecting and analyzing two distinct matrices (filter and XAD) from the active sampler. Artifacts in active air sampling have been reported as potential concerns [ 37 – 39 ]. For example, gas-phase PAH absorbed on the filter or breakthrough of particle-bound PAH from the filter to the XAD could lead to miss-quantification of the gas/particle distribution.…”

Section: Discussionmentioning

confidence: 99%

Maternal exposure to polycyclic aromatic hydrocarbons in South Texas, evaluation of silicone wristbands as personal passive samplers

Mendoza‐Sanchez

Uwak

Myatt

et al. 2021

J Expo Sci Environ Epidemiol

View full text Add to dashboard Cite

Background Prenatal exposure to polycyclic aromatic hydrocarbons (PAHs) is associated with adverse health effects in children. Valid exposure assessment methods with accurate spatial and temporal resolution across pregnancy is a critical need for advancing environmental health studies. Objective The objective of this study was to quantify maternal PAH exposure in pregnant women residing in McAllen, Texas where the prematurity rate and childhood asthma prevalence rates are high. A secondary objective was to compare PAH levels in silicone wristbands deployed as passive samplers with concentrations measured using standardized active air-sampling techniques. Methods Participants carried a backpack that contained air-sampling equipment (i.e., filter and XAD sorbent) and a silicone wristband (i.e., passive sampler) for three nonconsecutive 24-h periods. Filters, XAD tubes, and wristbands were analyzed for PAHs. Results The median level of exposure for the sum of 16 PAHs measured via active sampling over 24 h was 5.54 ng/m3 (filters) and 43.82 ng/m3 (XADs). The median level measured in wristbands (WB) was 586.82 ng/band. Concentrations of the PAH compounds varied across sampling matrix type. Phenanthrene and fluorene were consistently measured for all participants and in all matrix types. Eight additional volatile PAHs were measured in XADs and WBs; the median level of exposure for the sum of these eight PAHs was 342.98 ng/m3 (XADs) and 632.27 ng/band. The silicone wristbands (WB) and XAD sorbents bound 1-methynaphthalyne, 2-methylnaphthalene, biphenyl following similar patterns of detection. Significance Since prior studies indicate linkages between PAH exposure and adverse health outcomes in children at the PAH levels detected in our study, further investigation on the associated health effects is needed. Data reflect the ability of silicone wristbands to bind smaller molecular weight, semivolatile PAHs similar to XAD resin. Application of wristbands as passive samplers may be useful in studies evaluating semivolatile PAHs.

show abstract

“…Limited studies have been conducted on investigating the gas-particle partitioning of VOCs in the atmosphere. Samples collected in the field showed large variabilities of K ip due to both thermodynamic and non-thermodynamic reasons such as the dynamic temperature, sampling artifacts (e.g., which sampling system to use), non-equilibrium conditions [3 , 4 , [17] , [18] , [19] . Opposite correlations between K ip and the VOCs’ properties were also obtained [4 , 5] .…”

Section: Acknowledgmentsmentioning

confidence: 99%

A method to measure the partitioning coefficient of volatile organic compounds in nanoparticles

et al. 2020

View full text Add to dashboard Cite

The partitioning behavior of volatile organic compounds (VOCs) into nanoparticles is less studied compared to those of semivolatile organic compounds (SVOCs) because of the lower concentration of the VOCs that is expected to partition into particles. One challenge in measuring the accurate partition coefficient of VOCs is quantifying their low mass fraction that sorbed on nanoparticles and differentiating them from the high VOC concentrations present in the gas-phase. Systematically characterizing the partitioning coefficient at a specific environmental condition is also difficult when sampling in the field. During field sampling, thermal and non-thermal issues such as sampling artifacts and non-equilibrium conditions because of a dynamic environment often result in considerable variability in the measured partition coefficients. In this study, we developed a bench-scale system that can achieve precise control of the experimental condition ( e.g., relative humidity, temperature, and particle composition) and allow us to measure the low concentration of 1,2-dichlorobenzene in the particles. A similar set up can be used to study the low mass fraction of other VOCs partitioning in nanoparticles. The detailed but uncomplicated system setup may assist other researchers that investigate the global fate and transport and health effects of VOCs. A bench-scale system was built in the laboratory to study the gas-to-particle partitioning Experimental conditions can be controlled and easily varied The system enables the systematic study of a single environmental factor on the partitioning process

show abstract

Modeling and analysis of sampling artifacts in measurements of gas-particle partitioning of semivolatile organic contaminants using filter-sorbent samplers

Cited by 18 publications

References 67 publications

Study on the mechanism of SVOC adsorption onto airborne particles in indoor air

Study on the mechanism of SVOC adsorption onto airborne particles in indoor air

Maternal exposure to polycyclic aromatic hydrocarbons in South Texas, evaluation of silicone wristbands as personal passive samplers

A method to measure the partitioning coefficient of volatile organic compounds in nanoparticles

Contact Info

Product

Resources

About