Dechlorane Plus in surficial water and sediment in a northeastern Chinese river.
Surface water and sediment samples concurrently collected in Songhua River in northeastern China from May to October 2006 were analyzed for Dechlorane Plus (DP), a chlorinated flame retardant. Samples were obtained from three main areas: SHR-Rul (rural area of Songhua River), SHR-Hrb (the section of the river within the city of Harbin), and Hrb (urban waters of Harbin). The majority of SHR-Rul water samples (85%) and SHR-Hrb water samples (73%) and 33% of urban water samples (Hrb) were below the detection limit. The mean water DP concentration in Hrb (0.55 +/- 0.81 ng L(-1)) was approximately 3 times greater than the levels measured in SHR-Hrb (0.17 +/- 0.38 ng L(-1)) and more than 15 times greater than the levels measured in SHR-Rul (0.03 +/- 0.07 ng L(-1)). DP detection rates in sediment samples were 50% (Hrb), 100% (SHR-Hrb), and 78% (SHR-Rul). The mean sediment DP concentration in SHR-Hrb (0.11 +/- 0.05 ng g(-1)) was approximately three times greater than that in SHR-Rul (0.04 +/- 0.05 ng g(-1)). These DP concentrations are likely attributable to local sources in urban areas rather than distant sources via long-range transport. The mean fractional abundance of the syn isomer of DP (f(syn)) was 0.34 +/- 0.10 in all water samples, a value indistinguishable from that of a commercial mixture (f(syn) = 0.35), indicating the source was local. The mean f(syn) value of 0.23 +/- 0.06 in all sediment samples suggested a stereoselective depletion of syn-DP relative to the anti-DP isomer in sediments. To our knowledge, this paper represents the first report of DP concentrations in Chinese water and sediments.
Qi
Hong
H
International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China.
Liu
Liyan
L
Jia
Hongliang
H
Li
Yi-Fan
YF
Ren
Nan-Qi
NQ
You
Hong
H
Shi
Xinyuan
X
Fan
Lili
L
Ding
Yongsheng
Y
D002681:China; D005843:Geography; D019015:Geologic Sediments / Q000737:chemistry*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis* / Q000737:chemistry; D007536:Isomerism; D011083:Polycyclic Compounds / Q000032:analysis* / Q000737:chemistry; D011786:Quality Control; D045483:Rivers / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D006843:Hydrocarbons, Chlorinated; D011083:Polycyclic Compounds; D014874:Water Pollutants, Chemical; C526360:dechlorane plus