Endocrine disrupting compounds in sediment from KimNguu river, Northern area of Vietnam: a comprehensive assessment of seasonal variation, accumulation pattern and ecological risk.

Autor: Toan VD; Department of Environment, Thuyloi University, 175 Tay Son Street, Hanoi, Vietnam. vuductoan@tlu.edu.vn., Quynh TX; Trade Union University, 169 Tay Son Street, Hanoi, Vietnam., Huong NTL; Department of Environment, Thuyloi University, 175 Tay Son Street, Hanoi, Vietnam.
Jazyk: angličtina
Zdroj: Environmental geochemistry and health [Environ Geochem Health] 2020 Feb; Vol. 42 (2), pp. 647-659. Date of Electronic Publication: 2019 Sep 07.
DOI: 10.1007/s10653-019-00399-z
Abstrakt: This research presents the assessment of seasonal variation, accumulation pattern and ecological risk of selected endocrine disrupting compounds (S-EDCs) in sediment samples covering six sites in KimNguu river, Hanoi, Northern area of Vietnam. Selected EDCs compose polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs) and polybrominated diphenyl ethers (PBDEs). Sediment sampling was carried out in dry season (April) and wet season (October) in 2018. Results pointed out a significant contamination with ∑ 6 PCBs, ∑ 16 PAHs and ∑ 7 PBDE concentrations ranging from 4.73 to 36.34 ng g -1 dw, from 3.57 to 84.39 ng g -1 dw and from 4.49 to 12.49 ng g -1 dw, respectively. Composition analyses indicated the predominance of PCB 138, PCB 153, M-PAHs (Middle molecular weight PAHs: BaA, Chr, Pyr, Flt), BDE-47, BDE-99 and BDE-209. The values of TEQ DL-PCBs , TEQ ∑8PAHs and TEQ ∑16PAHs range from 4.6 to 10.4 ng kg -1  dw, from 0.28 to 1.28 ng g -1  dw and from 0.29 to 1.38 ng g -1  dw, respectively. Ecological risks of S-EDCs range from very low to medium levels in the sediment of KimNguu river.
Databáze: MEDLINE
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