Distribution, accumulation profile, and risk assessment of polybrominated diphenyl ethers in sediment from lake and river systems in Hanoi Metropolitan Area, Vietnam.
Concentrations of seven polybrominated diphenyl ethers (PBDEs) congeners were determined in surface sediments collected from several rivers and lakes in Hanoi, the capital city of Vietnam, to understand the status of background contamination, accumulation pattern, sources, and toxic implications for benthic organisms. Total PBDE concentrations in all sediment samples ranged from 0.03 to 17.5 ng/g dry weight (mean 1.33 ng/g dry wt). The most predominant congeners were BDE-47 and BDE-99, which comprised 30 and 25 % of total PBDE concentrations, respectively. Results from statistical analysis indicated that the potential sources of PBDEs of sediments in Hanoi may come from penta-BDE and octa-BDE mixtures. Risk quotients of PBDEs in sediments were also calculated for a benthic species, ranged from 2.12 × 10-6- 1.60 × 10-2, and were markedly lower than threshold value for occurrence of any ecotoxicological risk. This study provides some of the most comprehensive data on the occurrence of PBDEs in sediments from lake and river systems in Vietnam.
Faculty of Chemistry, VNU University of Science, Vietnam National University, 19 Le Thanh Tong Street, Hanoi, Vietnam.
Pham Thi Ngoc
PTN
Mai
Dioxin Laboratory, Center of Environmental Monitoring, Vietnam Environment Administration, 556 Nguyen Van Cu Street, Hanoi, Vietnam.
Nguyen
N
Van Thuong
Faculty of Environment, Hanoi University of Natural Resources and Environment, 41A Street K1, Cau Dien, Tu Liem, Hanoi, Vietnam.
Trinh Thi
TT
Tham
Faculty of Chemistry, VNU University of Science, Vietnam National University, 19 Le Thanh Tong Street, Hanoi, Vietnam.
Nguyen Khanh
NK
Hoang
Faculty of Chemistry, VNU University of Science, Vietnam National University, 19 Le Thanh Tong Street, Hanoi, Vietnam.
Hoang Quoc
HQ
Anh
Faculty of Chemistry, VNU University of Science, Vietnam National University, 19 Le Thanh Tong Street, Hanoi, Vietnam.
Tran Manh
TM
Tri
Faculty of Chemistry, VNU University of Science, Vietnam National University, 19 Le Thanh Tong Street, Hanoi, Vietnam.
Le Si
LS
Hung
Faculty of Chemistry, VNU University of Science, Vietnam National University, 19 Le Thanh Tong Street, Hanoi, Vietnam.
Dao Thi
DT
Nhung
Dioxin Laboratory, Center of Environmental Monitoring, Vietnam Environment Administration, 556 Nguyen Van Cu Street, Hanoi, Vietnam.
Vu Duc
VD
Nam
Dioxin Laboratory, Center of Environmental Monitoring, Vietnam Environment Administration, 556 Nguyen Van Cu Street, Hanoi, Vietnam.
Nguyen Thi Minh
NTM
Hue
Faculty of Chemistry, VNU University of Science, Vietnam National University, 19 Le Thanh Tong Street, Hanoi, Vietnam.
Nguyen Thi Anh
NTA
Huong
Center for Environmental Technology and Sustainable Development (CETASD), VNU University of Science, Vietnam National University, 334 Nguyen Trai Street, Hanoi, Vietnam.
Duong Hong
DH
Anh
Dioxin Laboratory, Center of Environmental Monitoring, Vietnam Environment Administration, 556 Nguyen Van Cu Street, Hanoi, Vietnam.
Nguyen Hung
NH
Minh
Faculty of Chemistry, VNU University of Science, Vietnam National University, 19 Le Thanh Tong Street, Hanoi, Vietnam. tubinhminh@gmail.com.
Tu Binh
TB
Minh
D002947:Cities; D054750:Ecotoxicology / Q000592:standards; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000032:analysis / Q000737:chemistry*; D055768:Halogenated Diphenyl Ethers / Q000032:analysis*; D060106:Lakes / Q000737:chemistry*; D018570:Risk Assessment; D045483:Rivers / Q000737:chemistry*; D014744:Vietnam; D014874:Water Pollutants, Chemical / Q000032:analysis*
D055768:Halogenated Diphenyl Ethers; D014874:Water Pollutants, Chemical
Commercial penta-BDEs; Emission source; Polybrominated diphenyl ethers; Risk assessment; Surface sediment