These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Dechlorane Plus in surficial water and sediment in a northeastern Chinese river.
    Author: Qi H, Liu L, Jia H, Li YF, Ren NQ, You H, Shi X, Fan L, Ding Y.
    Journal: Environ Sci Technol; 2010 Apr 01; 44(7):2305-8. PubMed ID: 20210356.
    Abstract:
    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.
    [Abstract] [Full Text] [Related] [New Search]