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Measurement of Residual Amount of Nanoplastics in vivo from Disposable Paper Cups
Summary
This study found that disposable paper cups lined with plastic release nanoplastics into hot beverages and that these nanoplastics can persist in the body. The results suggest that using single-use paper cups for hot drinks is a significant and largely overlooked source of nanoplastic exposure in daily life.
In this study, an experiment was conducted to determine whether nanoplastics extracted from disposable paper cups that are easily accessible and widely used in daily life remain in vivo. In order to extract nanoplastics, water boiled at 95-100℃ was added to a disposable paper cup, and the extracted nanoplastics were observed with a digital microscope. To check whether nanoplastics remained in the body, 1mg/mL of nanoplastic was administered to mice, urine and feces were collected to measure the amount of nanoplastics discharged, and the gastric tissue of mice was collected to confirm the amount of nanoplastics remaining on the stomach. As a result, it was confirmed that a significant amount of nanoplastic in the disposable paper cup was extracted at high water temperature, and the amount of nanoplastic was discharged out of the body, but some remained in the body.