Abstract
The occurrence and spatial distribution of dechloranes including mirex, dechlorane plus (DP), dechlorane (Dec) 602, Dec 603, and Dec 604 in surficial sediments of Lake Taihu were investigated in this study. The concentrations of mirex and DP ranged from below detection limit (BDL) to 1.29 ng g−1 dw and 0.051 to 2.10 ng g−1 dw, respectively. Dec 602, Dec 603, and Dec 604 on the other hand, were BDL in any of the samples. The contamination levels of DP were higher than that of Mirex at 21 of all 22 sampling sites. Levels of mirex and DP in the lake sediments were correlated when an extremely high mirex value was removed. Both mirex and DP levels were correlated with the amount of organic matters in the sediment samples. Spatial distribution of mirex and DP suggested that these two chemicals in the lake had similar input sources except for one site. Comparison to previously reported flame retardants’ levels in the sediments shows that DP levels were similar with the levels of tetrabromobisphenol A, hexabromocyclododecane but lower than PBDEs and organophosphates levels in Lake Taihu. The higher levels in the north-east part of Lake Taihu adjacent to two major cities: Wuxi and Suzhou, indicated that city effluent might be a major source for DP contamination in the lake.
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This study was supported financially by Public Welfare Project of Environmental Protection (201209016) and Major Science and Technology Program for Water Pollution Control and Treatment (2013ZX07101014-06).
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Yu, D., Yang, J., Li, T. et al. Levels and distribution of Dechloranes in sediments of Lake Taihu, China. Environ Sci Pollut Res 22, 6601–6609 (2015). https://doi.org/10.1007/s11356-014-3794-7
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DOI: https://doi.org/10.1007/s11356-014-3794-7