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Survey on PCDDs and PCDFs in sediments and soils in Ya-Er Lake area, China |
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| Authors: | Wu Wen-zhong K -W Schramm B Henkelmann Xu Ying Zhang Yong-yuan A Kettrup |
| Institution: | 1. State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, 430072, Wuhan 2. Lehrstuhl für ?kologische Chemie und Umweltanalytik, Techn. Universit?t Munchen, Germany 3. GSF-National Research Centre for Environment and Health, Institute of Ecological Chemistry, Ingolst?dter Landstr. 1, 85764, Neuherberg, Germany |
| Abstract: | For the first time in P. R. China, six locations were investigated regarding the impact of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) in contaminated sediments and soils in the Ya-Er Lake area. Total concentrations of PCDDs from 70 to 1.6×105 ng/kg dw, median 7.9×104 ng/kg dw and of PCDFs from 1.8 to 1.8×104 ng/kg dw, median 9.2×103 ng/kg dw were measured. The international toxic equivalents (I-TEQ) varied from 0.14 to 8.1×102 ng/kg dw, median 4.1×102 ng/kg dw. The PCDDs pattern showed that the concentration of OCDD was significantly higher than that of the low chlorinated congeners. The results indicated that parts of Ya-Er Lake are heavily polluted by these chlorinated compounds. Comparison of our results with the pattern of sediments showed significant differences. The results are of special importance because the pollution that affected Ya-Er Lake may spread to agricultural land and the Changjiang River. |
| Keywords: | survey PCDD/F PBrDD/F sediment soil Ya-Er Lake |
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