Chlorinated paraffins in indoor dust from Australia: Levels, congener patterns and preliminary assessment of human exposure

Chang He*, Sicco H. Brandsma, Hui Jiang, Jake W. O'Brien, Louise M. van Mourik, Andrew P. Banks, Xianyu Wang, Phong K. Thai, Jochen F. Mueller

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Chlorinated paraffins (CPs) are a group of polychlorinated n-alkanes with high production volumes. Until now, there are only limited data on the levels of CPs in the environment, especially in the indoor environment. In this study, dust samples were collected from 44 indoor environments, including 27 private houses, 10 offices, and 7 vehicles. Short-, medium-, and long-chain CPs were detected in all dust samples. The median concentration of ∑CPs (C 10 -C 21 ) was 57, 160 and 290 μg/g, in houses, offices, and vehicles, respectively. Medium-chain CPs were the dominant group, on average accounting for 86% of ∑CPs. Cl 6 and Cl 8 groups had the highest contributions to ∑CPs across all the different microenvironments, while C 13 and C 14 were the predominant groups of SCCPs and MCCPs. Median exposure to ∑CPs via indoor dust were estimated at 80 ng/kg/day and 620 μg/kg/day for Australian adults and toddlers respectively. The daily intake of CPs via dust, in the worse scenario, was still 2–3 orders of magnitudes lower than the reference doses based on neoplastic effects.

Original languageEnglish
Pages (from-to)318-323
Number of pages6
JournalScience of the Total Environment
Volume682
Early online date15 May 2019
DOIs
Publication statusPublished - 10 Sep 2019

Keywords

  • Chlorinated paraffins (CPs)
  • Human exposure
  • Indoor sources
  • Polychlorinated alkanes (PCAs)

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