Emission characteristics of diethylhexyl phthalate (DEHP) from building materials determined using a passive flux sampler and micro-chamber


Autoři: Naohide Shinohara aff001;  Atsushi Mizukoshi aff002;  Mayumi Uchiyama aff003;  Hirofumi Tanaka aff003
Působiště autorů: Research Institute of Science for Safety and Sustainability (RISS), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan aff001;  Department of Environmental Medicine and Behavioral Science, Kindai University Faculty of Medicine, Osakasayama, Osaka, Japan aff002;  MC Evolve Technologies Corporation, Inashiki, Ibaraki, Japan aff003
Vyšlo v časopise: PLoS ONE 14(9)
Kategorie: Research Article
doi: https://doi.org/10.1371/journal.pone.0222557

Souhrn

Emission rates of diethylhexyl phthalate (DEHP) from building materials, such as vinyl floorings and wall paper, determined using a passive flux sampler (PFS) were constant over the week-long measurement period. Emission rates for vinyl floorings and wallpaper were linearly correlated to the inverse of diffusion distance, which corresponds to the internal depth of the PFS. Surface-air DEHP concentrations (y0) were estimated as 1.3–2.3 μg/m3 for materials having a boundary layer molecular diffusion rate-limiting step. The partition coefficient (Kmaterial-air) was estimated as 3.3–7.5 × 1010 for these materials. Additionally, emission rates of DEHP from same building materials determined using a micro-chamber were 4.5–6.1 μg/m2/h. Mass transfer coefficients in the micro-chamber (hm) were estimated by comparing the results using the PFS and micro-chamber, and these were 1.1–1.2 × 10−3 and 8.1 × 10−4 m/s for vinyl floorings (smooth surface) and wallpaper (rough surface), respectively. The thickness of boundary layer on the surface of building materials in the micro-chamber were estimated to be 2.5–2.6 and 3.7 mm for vinyl floorings and wallpaper, respectively.

Klíčová slova:

Physical sciences – Chemistry – Polymer chemistry – Macromolecules – Polymers – Polyvinyl chloride – Physical chemistry – Sorption – Adsorption – Chemical compounds – Phthalates – Chemical physics – Mass diffusivity – Analytical chemistry – Mass spectrometry – Gas chromatography-mass spectrometry – Materials science – Materials – Physics – Classical mechanics – Pressure – Vapor pressure – Mass transfer – Research and analysis methods – Chromatographic techniques – Spectrum analysis techniques – Medicine and health sciences – Pharmacology – Pharmacologic analysis – Antibiotic susceptibility testing – Bacterial disk diffusion


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