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- Title
Fingerprinting and source apportionment of dioxin contamination of soils and chicken eggs in Southeast and Central Vietnam.
- Authors
Kudryavtseva, Anastasia D.; Shelepchikov, Andrey A.; Brodsky, Efim S.
- Abstract
Free-range chicken eggs and topsoil samples from private households in Southeast and South Central Coast of Vietnam were investigated to identify potential PCDD/F sources using Positive Matrix Factorization (PMF) approach. The PMF-extracted egg congener patterns were transformed to soil patterns using bioaccumulation factors and then compared to extracted soil and known dioxin sources patterns described in the literature. Free-range chicken egg PCDD/F profiles allowed to more precisely identify and distinguish potential PCDD/F sources. Five main PCDD/F sources were identified: open burning, vehicle emissions, background atmospheric deposition, Agent Orange, and so-called OCDD dechlorination pattern. The latter is characteristic for natural formation or ultimate weathering under tropical conditions of any primary source with predominant OCDD. Agent Orange source contribution ranged from 48 to 96% in soils, from 9 to 94% in eggs in hotspots, and from 10 to 31% in soil and from 4 to 45% in eggs in sprayed areas, respectively. Contributions of other sources varied significantly between sites.
- Subjects
VIETNAM; CENTRAL Coast (N.S.W.); EGGS; SOIL pollution; DIOXINS; MATRIX decomposition; TROPICAL conditions; GEOLOGIC hot spots; INSECT eggs
- Publication
Environmental Science & Pollution Research, 2022, Vol 29, Issue 31, p47137
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-022-19253-4