Polychlorinated biphenyl congeners in the aquatic environment of the Mekong River, South of Vietnam.
Polychlorinated biphenyl compounds (PCBs) were analyzed in sediments and clams' soft tissues from sampling sites in the Mekong River delta from the border with Cambodia to the coast of South China Sea. Concentrations of 13 individual PCB congeners are reported. Median concentration of SigmaPCB congeners was 0.279 ng g(-1) dry weight (range 0.106-2.016 ng g(-1) dry weight) in sediments, and 5.20 ng g(-1) dry weight (range 1.89-19.37 ng g(-1)) in clams. Distribution and bioaccumulation of PCBs in the delta are discussed. It is concluded that in the Mekong River delta PCB concentrations were generally lower than in other regions of Vietnam and their likely sources have been waste discharges from repair workshops and other facilities in the delta cities.
Carvalho
Fernando P
FP
Department of Radiological Protection and Nuclear Safety, Nuclear and Technological Institute, E.N. 10, 2685-953, Sacavém, Portugal. carvalho@itn.pt
Villeneuve
J-P
JP
Cattini
C
C
Thuan
Dao Dinh
DD
Nhan
Dang Duc
DD
D000818:Animals; D049872:Bivalvia / Q000378:metabolism; D004784:Environmental Monitoring; D011078:Polychlorinated Biphenyls / Q000032:analysis* / Q000378:metabolism; D045483:Rivers / Q000737:chemistry*; D014744:Vietnam; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls