Per- and polyfluoroalkyl substances in e-waste dust.
Chunjie Xia1, William A Stubbings2, Linh V Nguyen3
1O'Neill School of Public and Environmental Affairs, Indiana University, Bloomington, IN, USA. mvenier@iu.edu.
Environmental Science. Processes & Impacts
|May 14, 2026
Summary
Per- and polyfluoroalkyl substances (PFAS) were found in Canadian e-waste dust. Worker exposure risks were identified, highlighting concerns for occupational health and environmental release from recycling facilities.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Occupational Health
Background:
- Per- and polyfluoroalkyl substances (PFAS) are widely used in electronics.
- Limited data exists on PFAS contamination in North American e-waste facilities.
Purpose of the Study:
- To investigate the presence and levels of legacy and novel PFAS in indoor dust from Canadian e-waste dismantling facilities.
- To assess potential worker exposure risks associated with PFAS in e-waste dust.
Main Methods:
- Analyzed 87 PFAS in 19 indoor dust samples using advanced analytical techniques.
- Applied hydrolysis and direct total oxidizable precursor (dTOP) assays to quantify PFAS precursors.
- Estimated worker exposure through dust ingestion and compared it to established reference dosages.
Main Results:
- PFAS were detected in all samples, with concentrations ranging from 364-6090 ng g-1 (Σ64PFAS).
- Polyfluoroalkyl phosphate esters (PAPs) were the most abundant group; ultrashort PFAS were detected for the first time.
- Hydrolysis and dTOP assays revealed significant precursor concentrations, indicating potential for PFAA formation.
Conclusions:
- E-waste dust in Canadian facilities contains substantial levels of PFAS and their precursors.
- Estimated worker exposure exceeds safety thresholds for key PFAS (PFOS, PFOA), posing occupational health risks.
- The findings underscore the need for managing PFAS in e-waste to mitigate occupational and environmental risks.
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