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Exploring the external exposome using wearable passive samplers - The China BAPE study.

Jeremy P Koelmel1, Elizabeth Z Lin1, Pengfei Guo1

  • 1Department of Environmental Health Sciences, School of Public Health, Yale University, New Haven, CT, 06520, USA.

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Summary

Wearable air quality monitors reveal personal exposure profiles. This study identified toxic chemicals like dichlorvos and naphthalene, aiding in health risk assessment and source identification.

Keywords:
ExposomicsMass spectrometryNon-negative matrix factorizationPassive samplingPollutantspersonal exposure monitoring

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Area of Science:

  • Environmental health
  • Analytical chemistry
  • Toxicology

Background:

  • Environmental exposures pose significant health risks.
  • Current methods lack tools to assess personal exposure profiles and sources.
  • Understanding the external exposome is crucial for public health.

Purpose of the Study:

  • To capture personal exposure variations to airborne chemicals.
  • To identify airborne exposures posing the greatest health risks.
  • To develop a workflow for prioritizing chemicals of concern.

Main Methods:

  • Deployed passive air sampler wristbands on 84 participants (aged 60-69) for five months.
  • Utilized a novel gas chromatography-high resolution mass spectrometry workflow for data processing.
  • Predicted chemical toxicity to identify potential health concerns.

Main Results:

  • Identified frequent personal exposures to chemicals including dichlorvos, naphthalene, and polyaromatic hydrocarbons.
  • Highlighted dichlorvos (insecticides), naphthalene (mothballs), and PAHs as exposures of elevated toxicity.
  • Linked other exposures to diet, personal care products, smoke, and sunscreens.

Conclusions:

  • Wearable passive samplers offer a viable method for assessing personal exposure profiles.
  • The developed workflow aids in prioritizing chemicals of concern at community and individual levels.
  • Characterizing exposure sources enables targeted interventions for health improvement.