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A rapid micro chamber method to measure SVOC emission and transport model parameters

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dc.contributor.authorWang, Chunyien
dc.contributor.authorEichler, Clara M. A.en
dc.contributor.authorBi, Chenyangen
dc.contributor.authorDelmaar, Christiaan J. E.en
dc.contributor.authorXu, Yingen
dc.contributor.authorLittle, John C.en
dc.date.accessioned2023-10-13T14:37:26Zen
dc.date.available2023-10-13T14:37:26Zen
dc.date.issued2023-04-26en
dc.description.abstractAssessing exposure to semivolatile organic compounds (SVOCs) that are emitted from consumer products and building materials in indoor environments is critical for reducing the associated health risks. Many modeling approaches have been developed for SVOC exposure assessment indoors, including the DustEx webtool. However, the applicability of these tools depends on the availability of model parameters such as the gas-phase concentration at equilibrium with the source material surface, y(0), and the surface-air partition coefficient, K-s, both of which are typically determined in chamber experiments. In this study, we compared two types of chamber design, a macro chamber, which downscaled the dimensions of a room to a smaller size with roughly the same surface-to-volume ratio, and a micro chamber, which minimized the sink-to-source surface area ratio to shorten the time required to reach steady state. The results show that the two chambers with different sink-to-source surface area ratios yield comparable steady-state gas- and surface-phase concentrations for a range of plasticizers, while the micro chamber required significantly shorter times to reach steady state. Using y(0) and K-s measured with the micro chamber, we conducted indoor exposure assessments for di-n-butyl phthalate (DnBP), di(2-ethylhexyl) phthalate (DEHP) and di(2-ethylhexyl) terephthalate (DEHT) with the updated DustEx webtool. The predicted concentration profiles correspond well with existing measurements and demonstrate the direct applicability of chamber data in exposure assessments.en
dc.description.notesSupport for this research was provided by the Long-Range Research Initiative (LRI) of the European Chemical Industry Council (Cefic), project code LRI-B12.3. The authors thank Rainer Otter and the Cefic-LRI monitoring team for valuable input.en
dc.description.sponsorshipLong-Range Research Initiative (LRI) of the European Chemical Industry Council (Cefic) [LRI-B12.3]en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1039/d2em00507gen
dc.identifier.eissn2050-7895en
dc.identifier.issn2050-7887en
dc.identifier.issue4en
dc.identifier.pmid36897109en
dc.identifier.urihttp://hdl.handle.net/10919/116470en
dc.identifier.volume25en
dc.language.isoenen
dc.publisherRoyal Society of Chemistryen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectsemivolatile organic-compoundsen
dc.subjectphthalate plasticizeren
dc.subjectgas-phaseen
dc.subjectpredicting emissionsen
dc.subjectairborne particlesen
dc.subjectbuilding-materialsen
dc.subjectexposure pathwaysen
dc.subjectsettled dusten
dc.subjectairen
dc.subjectchemicalsen
dc.titleA rapid micro chamber method to measure SVOC emission and transport model parametersen
dc.title.serialEnvironmental Science-Processes & Impactsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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