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Updated: Jan 3, 2026
Sampling, Identification and Characterization of Microplastics Release from Polypropylene Baby Feeding Bottle during Daily Use
Published on: July 24, 2021
Microplastics in house dust from 12 countries and associated human exposure
Junjie Zhang1, Lei Wang2, Kurunthachalam Kannan3
1Ministry of Education, Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Wadsworth Center, New York State Department of Health, and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany, Empire State Plaza, P.O. Box 509, Albany, NY 12201-0509, United States.
Microplastics, specifically polyethylene terephthalate (PET) and polycarbonate (PC), are prevalent in indoor dust globally. Infants may ingest significant amounts of PET microplastics daily from household dust.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Toxicology
Background:
- Microplastic (MP) pollution is a significant global concern, primarily studied in marine environments.
- The presence and impact of MPs in indoor environments remain largely uninvestigated.
- Indoor dust serves as a potential reservoir for microplastic accumulation.
Purpose of the Study:
- To quantitatively determine the occurrence of polyethylene terephthalate (PET)- and polycarbonate (PC)-based MPs in indoor dust samples.
- To establish a novel analytical method for MP quantification in dust.
- To assess potential human exposure, particularly for infants, to indoor MPs.
Main Methods:
- Analysis of 286 indoor dust samples collected from 12 countries.
- Utilized a novel analytical method for quantitative MP determination.
- Measured concentrations of PET- and PC-based MPs and their respective monomers (terephthalic acid and bisphenol A).
Main Results:
- PET-based MPs were ubiquitous in all dust samples, with median concentrations of 5900 µg/g.
- PC-based MPs were also detected, with median concentrations of 8.8 µg/g.
- Positive correlations confirmed the presence of PET and PC in dust, with estimated median daily PET MP intake for infants ranging from 4000-150,000 ng/kg-bw/day.
Conclusions:
- Indoor dust is a significant environmental sink for PET and PC microplastics.
- The analytical method developed allows for accurate quantification of MPs in dust.
- Human exposure to indoor MPs, especially for vulnerable populations like infants, is a critical area for further health risk assessment.
