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Background levels of dioxin-like polychlorinated biphenyls (dlPCBs), polychlorinated, polybrominated and mixed halogenated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs, PBDD/Fs & PXDD/Fs) in sera of pregnant women in Accra, Ghana

  • Pennante Bruce-Vanderpuije
  • , David Megson
  • , Karl Jobst
  • , Gareth Rhys Jones
  • , Eric Reiner
  • , Court D. Sandau
  • , Edith Clarke
  • , Sam Adu-Kumi
  • , Joseph A. Gardella
  • SUNY Buffalo
  • The Council for Scientific and Industrial Research
  • Manchester Metropolitan University
  • Chemistry Matters Inc.
  • Government of Ontario
  • Waters Corporation,United Kingdom
  • Mount Royal University
  • Ministry of Health, Ghana
  • Environmental Protection Agency

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Human exposure data on dioxins and dioxin-like compounds (DLCs) in Ghana are limited. Based on health risks associated with dioxins and DLCs, the impact of maternal body burdens on foetal exposure is significant. This is the first study that assesses polychlorinated, polybrominated and mixed halogenated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs, PBDD/Fs and PXDD/Fs), and dioxin-like polychlorinated biphenyls (dlPCBs) in sera of primiparous Ghanaians. Our sample selection includes 34 participants from two municipalities (Accra and Tema), and explores contributions from environmental and dietary exposures using questionnaire data. Sample preparation involved C 18 solid phase extraction, purification with acidified silica and lipid removal cartridges, and detection with gas chromatography-atmospheric pressure chemical ionization-tandem mass spectrometry. The calculated average toxic equivalent concentration was 5.3 pg TEQ/g lw, with contributions from dlPCBs (1.25 pg TEQ/g lw), PCDD/Fs (3.10 pg TEQ/g lw), PBDD/Fs (0.49 pg TEQ/g lw) and PXDD/Fs (0.50 pg TEQ/g lw). The calculated total TEQ concentration was lower than background TEQ concentrations reported in sera of pregnant women globally. Positive correlations were obtained for total dioxins and DLC concentrations with age and Body Mass Index (BMI). Dietary intake of seafood and dairy products had a strong influence on PCDD/F and dlPCB concentrations. Statistically significant differences were observed for dioxins and DLCs in participants from Accra (in close proximity to Agbogbloshie e-waste site) and Tema. Given the significant TEQ contribution of PBDD/Fs and PXDD/Fs (~20%), it is essential to explore these classes of dioxins and DLCs in future biomonitoring studies as they may pose health risks, and add extra diagnostic information in source exposure investigations.

Original languageEnglish
Pages (from-to)631-642
Number of pages12
JournalScience of the Total Environment
Volume673
DOIs
StatePublished - Jul 10 2019

Keywords

  • Background concentrations
  • Dioxin-like compounds
  • Dioxins
  • Ghana
  • Pregnant women
  • Serum

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