Systematic evaluation of the adsorption of organic vapors onto a miniaturized cartridge device using breakthrough tests in parallel experiment with a full size respirator cartridge

Janvier, Florence; Tuduri, Ludovic; Cossement, Daniel; Drolet, Daniel; Lara, Jaime

doi:10.1177/0263617416653119

Cited by 2 publications

(1 citation statement)

References 42 publications

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“…The calculated minimum service life requirements were then compared to the range of experimental 5 ppm breakthrough times obtained for all ACF cartridges (Table 3). Among the The service life of an organic vapor cartridge at other conditions (e.g., different challenge concentrations) may be estimated by various methods, such as breakthrough experimental tests using full-size cartridges or modified containers [36][37][38] and predictive modeling [39,40]. However, one rule of thumb for estimating such service life states that reducing the challenge concentration by a factor of 10 will increase the service life of a cartridge by a factor of five [41].…”

Section: Estimation Of Acf Cartridge Service Livesmentioning

confidence: 99%

Adsorption Characteristics of Activated Carbon Fibers in Respirator Cartridges for Toluene

Balanay

2021

IJERPH

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Respirator use has been shown to be associated with overall discomfort. Activated carbon fiber (ACF) has potential as an alternative adsorbent for developing thinner, lightweight, and efficient respirators due to its larger surface area, microporosity, and fabric form. The purpose of this pilot study was to determine the adsorption characteristics of commercially available ACF in respirator cartridges with varying ACF composition for toluene protection. Seven ACF types (one cloth, six felt) with varying properties were tested. Seven ACF cartridge configurations with varying ACF composition were challenged with five toluene concentrations (20–500 ppm) at constant air temperature (23 °C), relative humidity (50%), and air flow (32 LPM). Breakthrough curves were obtained using photoionization detectors. Breakthrough times (10%, 50%, and 5 ppm) and adsorption capacities were compared among ACF cartridge configurations to determine their suitable application in respiratory protection. Results showed that ACF cartridges containing the densest ACF felt types had the longest average breakthrough times (e.g., ~250–270 min to reach 5 ppm breakthrough time) and those containing ACF felt types with the highest specific surface areas had the highest average adsorption capacity (~450–470 mg/g). The ACF cartridges demonstrated breakthrough times of <1 h for 500 ppm toluene and 8–16 h for 20 ppm toluene. The ACF cartridges are more reliable for use at low ambient toluene concentrations but still have potential for use at higher concentrations for short-term protection. ACF felt forms with appropriate properties (density of ~0.07 g/cm3; specific surface area of ~2000 m2/g) have shown promising potential for the development of lighter and thinner respirators for protection against toluene.

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Section: Estimation Of Acf Cartridge Service Livesmentioning

confidence: 99%

Adsorption Characteristics of Activated Carbon Fibers in Respirator Cartridges for Toluene

Balanay

2021

IJERPH

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Applying the CDC Science Impact Framework to the results of the National Institute for Occupational Safety and Health and the Bureau of Labor Statistics 2001 survey of respirator use and practices

Yoon

Ari

Yorio

et al. 2022

Journal of Occupational and Environmental Hygiene

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Supplemental A.(1) The survey questionnaires were mailed by BLS to the selected 40,002 establishments during August 2001 and the response rate was 75.5%. (2) A total of 27 publications were identified during the interviews. Those 27 studies were recorded and written in a document by the initial research team. (3) Both coders hold Ph.D. with extensive research experience. One coder holds Ph.D. in social science with experience in qualitative methods including interviews and content analysis. The other holds Ph.D. in statistics with many years of experience on quantitative and qualitative data analysis. (4) When discrepancies, the two coders discussed the rationale of their own decision. The main discussion evolved around the difference between "creating awareness" and "catalyzing action."The criteria we used are:• NIOSH/BLS-pushed publications with main focus on disseminating the results of the survey belong to Disseminating Science (they include disseminating overall results such as two major publications and industry-specific SRUP results dissemination) • Some NIOSH-authors' works are categorized as Catalyzing Action when their research was motivated by the original NIOSH publications on the 2001 SRUP-e.g., research on respirator fit (many papers were published on this research subject) was motivated by the 2001 SRUP • Non-NIOSH/BLS-pushed publications belong to Creating Awareness when they simply cite the initial publications to support statements on facts or their arguments • Among non-NIOSH authors publications, those with evidence that the 2001 SRUP influenced/contributed/initiated/motivated their research belong to Catalyzing Action There was no case the coders couldn't reach to a consensus after discussion.(5) There are records indicating that NIOSH presented survey findings at 10 conferences until 2005.

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Systematic evaluation of the adsorption of organic vapors onto a miniaturized cartridge device using breakthrough tests in parallel experiment with a full size respirator cartridge

Cited by 2 publications

References 42 publications

Adsorption Characteristics of Activated Carbon Fibers in Respirator Cartridges for Toluene

Adsorption Characteristics of Activated Carbon Fibers in Respirator Cartridges for Toluene

Applying the CDC Science Impact Framework to the results of the National Institute for Occupational Safety and Health and the Bureau of Labor Statistics 2001 survey of respirator use and practices

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