2020年7月
Bioaccessibility and exposure assessment of flame retardants via dust ingestion for workers in e-waste processing workshops in northern Vietnam
Chemosphere
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- 巻
- 251
- 号
- 開始ページ
- 126632
- 終了ページ
- 126632
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.chemosphere.2020.126632
Flame retardants (FRs) from electronic waste (e-waste) are a widespread environmental concern. In our study, in vitro physiologically based extraction tests (PBETs) for FRs were conducted in three different areas where dust remained after processing of e-waste to identify the bioaccessible FRs and quantify their bioaccessibilities of gastrointestinal tract for human as well as to assess the exposure via ingestion of workers in e-waste processing workshops. All 36 FRs were measured and detected in indoor dusts. Among the FRs, the mean concentrations of polybrominated diphenyl ethers (PBDEs) in the floor dust and settled dust were highest, 65,000 ng/g, and 31,000 ng/g, respectively. In contrast, phosphorus containing flame retardants (PFRs) presented the highest mean concentration in the workplace dust samples, 64,000 ng/g. However, the highest bioaccessible concentrations in workplace dust, floor dust, and settled dust were observed for PFRs: 5900, 1600, and 680 ng/g, respectively. This study revealed that the higher bioaccessibility of PFRs versus other compounds was related to the negative correlation between FR concentrations and log KOW (hydrophobicity) values. The fact that hazard indices calculated using measured bioaccessibilities were less than 1 suggested that the non-cancer risk to human health by the FRs exposure via dust ingestion might be low.
- リンク情報
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- DOI
- https://doi.org/10.1016/j.chemosphere.2020.126632
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/32443225
- 共同研究・競争的資金等の研究課題
- 規制難燃剤に代わる縮合型リン系難燃剤の安全性評価:適切なリスクベース管理に向けて
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85082740793&origin=inward
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85082740793&origin=inward
- ID情報
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- DOI : 10.1016/j.chemosphere.2020.126632
- ISSN : 0045-6535
- eISSN : 1879-1298
- PubMed ID : 32443225
- SCOPUS ID : 85082740793