期刊
ENVIRONMENTAL MONITORING AND ASSESSMENT
卷 186, 期 8, 页码 5285-5295出版社
SPRINGER
DOI: 10.1007/s10661-014-3777-7
关键词
PBDEs; PCBs; OCPs; PAHs; Sources; Ecological risk
资金
- National Basic Research Program of China [2009CB421602]
- National Natural Science Foundation of China [21077134]
- China Ministry of Environmental Protection's Special Funds for Scientific Research on Public Welfare [201009026]
Polybrominated diphenyl ethers (PBDEs), organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), and polycyclic aromatic hydrocarbons (PAHs) in 25 surface sediments in three cities (Nantong, Wuxi, and Suzhou) in the Yangtze River Delta, eastern China were measured. The mean concentrations were 378, 45.8, 1.98, 4,002 ng/g for PBDEs, OCPs, PCBs, and PAHs, respectively. Their levels in the sediments in the three cities were generally consistent with the city industrialization. PBDEs and OCPs were markedly dominated by deca-BDE (> 90 %) and DDTs (> 70 %). A principle component analysis of the analytes identified three major factors suggesting different sources of the contaminants in the sediments. PBDEs and the organic carbon in the sediments have common sources from industrial activities; whereas OCPs and PCBs, correlated with the second factor, were mainly from historical sources. The third factor with loadings of PAHs is indicative of various combustion sources. Ecological risk assessment indicated that the potential highest risk is from DDTs, for which 22 sites exceed the effects range low (ERL) values and three sites exceed the effects range median (ERM) value.
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