Global Quantification of Microplastics in Indoor Dust : Prevalence, Exposure and Risk Assessment
This global-scale study measured the prevalence of indoor microplastics (MP) in deposited dust over a 1-month period in 108 homes from 29 countries. Dust borne MP shape, colour, and length were determined using microscopy and the composition measured using µFTIR. Human health exposure and risk was assessed along with residential factors associated with MP via a participant questionnaire. Samples were categorised according to countries’ gross national income (GNI). Polymers dominated in low income (LI) (39 %) and high income (HI) (46 %) while natural fibres were the most prevalent in medium income (MI) (43 %) countries. Composition and correlation analysis indicated that main sources of MP and dust were predominantly from indoor sources. Across all GNI countries, greater vacuuming frequency was associated with lower MP loading. High income country samples returned higher proportions of polyamides and polyester fibres, whereas LI countries polyurethane was the most prominent MP fibre. Exposure modelling shows infants (0–2 years) are exposed to the highest MP dose through inhalation (4.5 × 10-5 ± 3 × 10-5) and ingestion (3.24 × 10-2 ± 3.14 × 10-2) mg/kg-Bw/day. Health risk analysis of constituent monomers of polymers indicates cancer incidence is estimated at 4.1–8.7 per million persons across age groups. This study’s assessment of MP exposure risks revealed that socio-economic factors and age are dominant variables in determining dose and associated health outcomes of MP in household dust
Year of publication: |
[2022]
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Authors: | Sharifi Soltani, Neda ; Taylor, Mark ; Wilson, Scott Paton |
Publisher: |
[S.l.] : SSRN |
Saved in:
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