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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Patterns and sources of PCDD/Fs and dioxin-like PCBs in surface sediments from the East River, China.
Journal of Hazardous Materials 2009 October 16
The contamination status of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (DL-PCBs) was preliminarily investigated in surface sediments collected from the East River during April 2007. The contamination levels of PCDD/Fs and DL-PCBs ranged from 2.1 to 9.8 with mean concentration of 4.5 pg WHO(98)-TEQ g(-1) and ranged from 0.042 to 0.45 with mean concentration of 0.19 pg WHO(98)-TEQ g(-1), respectively. All sediments were characterized by the elevated levels of PCDDs, especially OCDD. Higher concentrations of PCDD/Fs were found in the sediments from Guangzhou and Dongguan. Source analysis revealed that PCDD/Fs in the sediments from Guangzhou were mainly from the secondary copper smelters and steel-making plants, and PCDD/Fs in the sediment from Dongguan were mainly from MSWIs. PCP and paper mills were unlikely to be the main sources.
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