Chemical and bioanalytical characterization of dioxins in indoor dust in Hong Kong

Yuan Kang, Kwai Chung Cheung, Zongwei CAI, Ming Hung WONG*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

In the present work, air-conditioner filter dust samples collected from commercial office, secondary school, shopping mall, electronic factory and manufacturing plant in Hong Kong were collected for 7-ethoxyresorufin O-deethylase (EROD) assay using a hepatoma cell line (H4IIE) and chemical analysis of dioxins including polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and PCBs with dioxin-like structure. The result of EROD assay showed that bioassay derived TEQ of 2,3,7,8-TCDD (TEQbio) of dust samples varied from 320 to 730pg/g. Chemical analyses revealed that chemical derived TEQ of 2,3,7,8-TCDD (TEQcal) of dust samples ranged from 134 to 531pg/g. In addition, the TEQcal of samples were significantly correlated with TEQbio of samples (R=0.83, P<0.01). The average daily doses (ADDs) of dioxins via indoor dust with the estimated ADDs of dioxins via air and food were compared. The results showed that indoor dust is an important medium of exposure to dioxins.

Original languageEnglish
Pages (from-to)947-952
Number of pages6
JournalEcotoxicology and Environmental Safety
Volume74
Issue number4
DOIs
Publication statusPublished - May 2011

Scopus Subject Areas

  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

User-Defined Keywords

  • EROD assay
  • H4IIE
  • TEQ

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