Journal
ATMOSPHERIC ENVIRONMENT
Volume 268, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.atmosenv.2021.118789
Keywords
Phthalates; Di-n-octyl phthalate; Settled dust; Mass transfer; Influence factors
Funding
- National Natural Science Foundation of China [51878553]
- innovation and entrepreneurship training program for college students in Shaanxi Province [GJ201910698135]
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In this study, the migration pathways of di-n-octyl phthalate (DNOP) in indoor environments were investigated. The results showed that direct contact with source surfaces enhanced the sorption of DNOP in dust, while temperature had little influence. These findings are important for reducing human exposure to phthalates in indoor environments.
Phthalates (PAEs) are pervasive in indoor environments. In this study, two migration pathways of di-n-octyl phthalate (DNOP) from a source to dust were investigated using microchambers in a thermostatic incubator: (1) mass transfer through direct contact with source surfaces; (2) mass transfer through air. A 20-day emission experiment with settled dust was performed at 30 ?. Significantly higher concentrations were observed in dust that was in direct contact than in dust that was not, which indicated that direct contact enhanced the sorption of the dust on DNOP. The difference between source and non-source surface was low of the migration of the DNOP in the dust. In addition, the temperature and dust loading and diffusion distance were considered. The results suggested that the temperature did not considerably influence the difference between source and non-source surface; however, the difference increased with an increase in dust loading. These results can help understand the mass transfer mechanism of PAEs to implement effective control measures and reduce the human exposure to PAEs in indoor environments.
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