Patterns and sources of PCDD/Fs and dioxin-like PCBs in surface sediments from the East River, China.
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.
Ren
Man
M
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
Peng
Ping'an
P
Chen
Deyi
D
Chen
Pei
P
Li
Xiaoming
X
D002681:China; D003300:Copper; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000032:analysis*; D007220:Industrial Waste; D008669:Metallurgy; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis; D045483:Rivers / Q000737:chemistry; D013232:Steel
D007220:Industrial Waste; D000072317:Polychlorinated Dibenzodioxins; D013232:Steel; D003300:Copper; D011078:Polychlorinated Biphenyls