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Published on: February 21, 2011
Thirdhand cigarette smoke: factors affecting exposure and remediation
Vasundhra Bahl1, Peyton Jacob2, Christopher Havel2
1Department of Cell Biology and Neuroscience, University of California Riverside, Riverside, California, United States of America; Environmental Toxicology Graduate Program, University of California Riverside, Riverside, California, United States of America.
Thirdhand smoke (THS) chemicals persist on indoor fabrics for over a year. Cotton releases significantly more THS chemicals than polyester, leading to higher potential exposure risks for children and adults.
Area of Science:
- Environmental Chemistry
- Public Health
- Toxicology
Background:
- Thirdhand smoke (THS) comprises residual secondhand smoke components on indoor surfaces.
- Limited data exists on THS chemical persistence, exposure levels, and effective remediation strategies.
- Understanding THS aging and release is crucial for public health interventions.
Purpose of the Study:
- To investigate the impact of aging on THS chemical composition in fabrics.
- To evaluate potential exposure levels from THS residues on indoor surfaces.
- To assess the efficacy of different fabric types in retaining and releasing THS chemicals.
Main Methods:
- Exposure of cotton and polyester fabrics to cigarette smoke under controlled conditions.
- Aging of smoke-exposed fabrics for up to 19 months.
- Extraction of THS chemicals (nicotine, alkaloids, TSNAs) using aqueous methods.
- Chemical analysis via liquid chromatography-tandem mass spectrometry.
Main Results:
- Fabrics retained significant THS chemical concentrations even after 19 months of aging.
- Cotton released substantially higher levels of nicotine (41x) and TSNAs (78x) compared to polyester.
- Estimated toddler and adult exposure to nicotine and TSNAs from THS residue significantly exceeded passive inhalation levels.
Conclusions:
- THS chemicals persist on indoor fabrics, posing long-term exposure risks.
- Fabric type significantly influences THS chemical retention and release.
- Findings inform remediation strategies and public health policies for THS-contaminated environments.
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