Journal
ENVIRONMENT INTERNATIONAL
Volume 134, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.envint.2019.105314
Keywords
Microplastics; Indoor dust; Polyethylene terephthalate; Polycarbonate; Human exposure
Categories
Funding
- National Natural Science Foundation of China [41722304]
- 111 Program of the Ministry of Education, China [T2017002]
- Chinese Scholarship Council [CSC 201806200120]
- National Institute of Environmental Health Sciences of the National Institutes of Health [U2CES026542-01]
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Global marine pollution by microplastics (MPs) has received considerable attention in recent years. Nevertheless, little is known about the occurrence of MPs in indoor environments. A novel analytical method was used to quantitatively determine polyethylene terephthalate (PET)- and polycarbonate (PC)- based MPs in 286 indoor dust samples collected from 12 countries. PET-based MPs were detected in all dust samples at concentrations of 38-120,000 mu g/g (median: 5900 mu g/g), whereas PC-based MPs were measured at < 0.11-1700 mu g/g (median: 8.8 mu g/g). Significant positive correlations were found between the concentrations of terephthalic acid (a PET monomer) and PET as well as between bisphenol A (a PC monomer) and PC. Based on the concentrations of MPs measured in indoor dust, the median daily intake of PET-based MPs calculated for infants was in the range of 4000-150,000 ng/kg-bw/day.
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