Spatial and seasonal variation of polychlorinated biphenyls in Songhua River, China.
The spatial and seasonal variation of polychlorinated biphenyls (PCBs) were investigated in water and sediment samples collected from Songhua River, China, from 2007 to 2008. The total concentration of PCB congeners ranged from 1.1 to 14 ng/l in water and 0.26-9.7 ng/g dry weight (dw) in sediment. The results of seasonal variation may suggest an impact to PCB concentration in water from its atmospheric input, the dilution to PCBs concentrations of high stream in summer, and a general trend towards increased volatilization in warmer conditions. From PCBs concentrations comparison between upstream and downstream of industrial urban cities, it was obvious that industrial urban cities reflect an important pollutant source for PCBs in our study, also with the evidences of high concentrations of PCBs occurring in high development industry and residential areas. Meanwhile, the homologue profile of PCBs in Songhua was analyzed, whose comparison with published data indicates that the sources of PCBs accumulated in the sediment may also came from the residue of PCBs production in China. Total five dioxin-like PCBs (CB-77, 81, 105, 114, and 126) and nine (CB-77, 81, 105, 114, 118, 123, 126, 156, and 167) were found in Songhua water and sediment.
State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, 150090 Harbin, China. yokelist@vip.sina.com
Hong
H
You
Jing
J
Ding
Xue-Song
XS
Zhao
Yi-Fan
YF
Li
Li-Yan
LY
Liu
Wan-Li
WL
Ma
Hong
H
Qi
Ji-Min
JM
Shen
D002681:China; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000032:analysis*; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D045483:Rivers / Q000737:chemistry*; D012621:Seasons; D014874:Water Pollutants, Chemical / Q000032:analysis
D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls