PCDD/Fs and Dioxin-like PCBs in Chicken Eggs and Soils in Dong Nai Province, Southern Vietnam: Impacts of Raising Methods and Nearby Pollution Sources

Bull Environ Contam Toxicol. 2022 Jan;108(1):136-144. doi: 10.1007/s00128-021-03419-w. Epub 2022 Jan 17.

Abstract

Polychlorinated dibenzo-p-dioxins/furans (PCDD/Fs) and dioxin-like PCBs (DL-PCBs) were examined in chicken egg and soil samples collected from Dong Nai Province, southern Vietnam. PCDD/F and DL-PCB levels in egg samples ranged from 5.74 to 1320 (median 350) and from 120 to 51,200 (median 1470) pg/g lipid weight (lw), respectively. Toxic equivalents to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TEQ) in egg samples ranged from 0.817 to 245 (median 10.8) pg TEQ/g lw. Higher dioxin levels were found in free-range eggs than non-free-range ones. We found significant correlation between TEQ levels in paired egg and soil samples collected from the Bien Hoa Airbase and some communities adjacent to industrial areas (Spearman's ρ = 0.671; p < 0.05), suggesting the co-occurrence of legacy and current dioxin emission sources in these areas.

Keywords: Chicken egg; Dioxin-like PCBs; PCDD/Fs; Soil; Vietnam.

MeSH terms

  • Animals
  • Chickens
  • Dibenzofurans
  • Dibenzofurans, Polychlorinated
  • Dioxins* / analysis
  • Food Contamination / analysis
  • Polychlorinated Biphenyls* / analysis
  • Polychlorinated Dibenzodioxins* / analysis
  • Soil
  • Vietnam

Substances

  • Dibenzofurans
  • Dibenzofurans, Polychlorinated
  • Dioxins
  • Polychlorinated Dibenzodioxins
  • Soil
  • Polychlorinated Biphenyls