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Airborne phthalate partitioning to cotton clothing
Abstract Accumulation on indoor surfaces and fabrics can increase dermal uptake and non-dietary ingestion of semi-volatile organic compounds. To better understand the potential for dermal uptake of phthalates from clothing, we measured the mass accumulation on cotton fabrics of two phthalate esters commonly identified in indoor air: diethylphthalate (DEP) and di-n-butyl phthalate (DnBP). In 10-day chamber experiments, we observed strong air-to-cloth partitioning of these phthalates to shirts and jean material. Area-normalized partition coefficients ranged from 209 to 411 (μg/m2)/(μg/m3) for DEP and 2850 to 6580 (μg/m2)/(μg/m3) for DnBP. Clothing volume-normalized partition coefficients averaged 2.6 × 105 (μg/m3)/(μg/m3) for DEP and 3.9 × 106 (μg/m3)/(μg/m3) for DnBP. At equilibrium, we estimate that a typical set of cotton clothing can sorb DnBP from the equivalent of >10,000 m3 of indoor air, thereby substantially decreasing external mass-transfer barriers to dermal uptake. Further, we estimate that a significant fraction of a child's body burden of DnBP may come from mouthing fabric material that has been equilibrated with indoor air.
Graphical abstract Display Omitted
Highlights We measure phthalate partitioning from air to cotton fabric. DEP and DnBP partition coefficients are respectively 2.5 × 105 and 4 × 106. Adsorption effectively concentrates ∼10,000 m3 of DnBP laden air into cloth. Non-dietary phthalate ingestion by toddlers mouthing cotton may be substantial.
Airborne phthalate partitioning to cotton clothing
Abstract Accumulation on indoor surfaces and fabrics can increase dermal uptake and non-dietary ingestion of semi-volatile organic compounds. To better understand the potential for dermal uptake of phthalates from clothing, we measured the mass accumulation on cotton fabrics of two phthalate esters commonly identified in indoor air: diethylphthalate (DEP) and di-n-butyl phthalate (DnBP). In 10-day chamber experiments, we observed strong air-to-cloth partitioning of these phthalates to shirts and jean material. Area-normalized partition coefficients ranged from 209 to 411 (μg/m2)/(μg/m3) for DEP and 2850 to 6580 (μg/m2)/(μg/m3) for DnBP. Clothing volume-normalized partition coefficients averaged 2.6 × 105 (μg/m3)/(μg/m3) for DEP and 3.9 × 106 (μg/m3)/(μg/m3) for DnBP. At equilibrium, we estimate that a typical set of cotton clothing can sorb DnBP from the equivalent of >10,000 m3 of indoor air, thereby substantially decreasing external mass-transfer barriers to dermal uptake. Further, we estimate that a significant fraction of a child's body burden of DnBP may come from mouthing fabric material that has been equilibrated with indoor air.
Graphical abstract Display Omitted
Highlights We measure phthalate partitioning from air to cotton fabric. DEP and DnBP partition coefficients are respectively 2.5 × 105 and 4 × 106. Adsorption effectively concentrates ∼10,000 m3 of DnBP laden air into cloth. Non-dietary phthalate ingestion by toddlers mouthing cotton may be substantial.
Airborne phthalate partitioning to cotton clothing
Morrison, Glenn (author) / Li, Hongwan (author) / Mishra, Santosh (author) / Buechlein, Melissa (author)
Atmospheric Environment ; 115 ; 149-152
2015-05-23
4 pages
Article (Journal)
Electronic Resource
English
SVOC , Phthalate , Clothing , Exposure , Adsorption , Partitioning
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