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Related Experiment Video

Updated: Jan 18, 2026

Sampling and Identification of Microplastics in Groundwater
08:27

Sampling and Identification of Microplastics in Groundwater

Published on: November 7, 2025

977

Detection and quantification of microplastics in cerumen.

Bengi Arslan1, Yüce Islamoğlu2, Ali Sami Berçin3

  • 1Clinic of Otorhinolaryngology, Ankara Bilkent City Hospital, Ankara, Turkiye.

Turkish Journal of Medical Sciences
|September 11, 2025
PubMed
Summary

Microplastics were detected in 83.3% of human earwax samples, suggesting a potential new pathway for the body to eliminate these environmental particles. This finding highlights earwax as a novel bioindicator for microplastic exposure.

Keywords:
Microplasticsbiomonitoringcerumenexcretion pathwayhuman exposure

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Area of Science:

  • Environmental Science
  • Toxicology
  • Human Health

Background:

  • Microplastics (MPs) are ubiquitous environmental pollutants with increasing concern for human exposure.
  • Evidence suggests MPs can systemically distribute within human tissues and fluids.
  • The ear canal, due to its environmental exposure, is a potential site for MP accumulation.

Purpose of the Study:

  • To investigate the presence of microplastics in human cerumen.
  • To assess the ear canal as a potential site for MP accumulation and elimination.
  • To evaluate cerumen as a noninvasive bioindicator for MP exposure.

Main Methods:

  • Cerumen samples were collected from 12 adult patients (23 samples) and three water controls.
  • Microplastics were extracted, filtered (0.22 μm), and identified morphologically via microscopy.
  • Descriptive statistics were used for analysis; chemical identification was not performed.

Main Results:

  • Microplastics were detected in 83.3% of patient cerumen samples (10 out of 12 patients).
  • A total of 31 microplastic particles (16-930 μm) were found in patient samples.
  • Water controls had fewer and smaller particles (3-46 μm), indicating genuine human presence.

Conclusions:

  • Human cerumen contains microplastics, suggesting a novel elimination route.
  • The high detection rate and distinct particle characteristics support genuine accumulation.
  • Cerumen shows potential as a noninvasive bioindicator for microplastic exposure assessment.