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.
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This study was supported by the Vietnam-Russia Tropical Center.
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Truong Xuan Nghiem, Anh Quoc Hoang, Thang Duc Nguyen, Thu Thi Nguyen, Phien Dinh Tran, Tuan Thanh Nguyen, and Minh Binh Tu. The first draft of the manuscript was written by Truong Xuan Nghiem and Anh Quoc Hoang and revised by Minh Binh Tu. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Nghiem, T.X., Hoang, A.Q., Nguyen, T.D. et al. 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 108, 136–144 (2022). https://doi.org/10.1007/s00128-021-03419-w
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DOI: https://doi.org/10.1007/s00128-021-03419-w