Over seventy congeners of polychlorinated naphthalenes(PCNs) in sewage sludge of 8 urban waste-water treatment plants(WWTPs) in Beijing were analyzed by isotope dilution,and high resolution gas chromatography/high res...Over seventy congeners of polychlorinated naphthalenes(PCNs) in sewage sludge of 8 urban waste-water treatment plants(WWTPs) in Beijing were analyzed by isotope dilution,and high resolution gas chromatography/high resolution mass spectrometry(HRGC/HRMS) method.The total PCN concentrations determined in the samples range from 1.48 to 28.21 ng/g dw(dry weight) with TEQ concentrations of 0.11―2.45 pg/g dw.These levels were lower than those found in other regions.DiCNs and TrCNs were the most dominant homologues of PCNs.The similar congener profiles in all the samples suggest the similarity in certain sources.Contamination from industrial input might be the most significant source of PCNs in the sludges in this study,and thermal processes such as waste incineration and coal combustion may be another source of the PCNs contamination.展开更多
The concentrations and congener profiles of poly- chlorinated naphthalenes （PCNs） in surface sediment samples collected from the Yangtze and Yellow River Estuaries were inves- tigated. PCN congeners （from MoCNs to ...The concentrations and congener profiles of poly- chlorinated naphthalenes （PCNs） in surface sediment samples collected from the Yangtze and Yellow River Estuaries were inves- tigated. PCN congeners （from MoCNs to OCN） were determined by isotope dilution/high-resolution gas chromatography/high- resolution mass spectrometry （HRGC-HRMS）. The total concen- trations of PCNs were 34.3-303.0 pg/g （dry weight, dw） in the Yangtze Estuary samples and 6.2-408.0 pg/g （dw） in the Yellow River Estuary samples, which were lower compared with that in other sediments reported by previous studies. In addition, the re- markably different homologue or congener profiles of PCNs have been obtained in this study. Samples dominated with MoCNs to TrCNs might be attributed to atmospheric deposition and global fractionation, while in other samples taken from the surrounding industrial areas the enrichment of higher chlorinated homologues suggested that the industrial and human activities should be the main potential sources.展开更多
基金Supported by the National Natural Science Foundation of China (Grant Nos. 20677070 and 20621703)
文摘Over seventy congeners of polychlorinated naphthalenes(PCNs) in sewage sludge of 8 urban waste-water treatment plants(WWTPs) in Beijing were analyzed by isotope dilution,and high resolution gas chromatography/high resolution mass spectrometry(HRGC/HRMS) method.The total PCN concentrations determined in the samples range from 1.48 to 28.21 ng/g dw(dry weight) with TEQ concentrations of 0.11―2.45 pg/g dw.These levels were lower than those found in other regions.DiCNs and TrCNs were the most dominant homologues of PCNs.The similar congener profiles in all the samples suggest the similarity in certain sources.Contamination from industrial input might be the most significant source of PCNs in the sludges in this study,and thermal processes such as waste incineration and coal combustion may be another source of the PCNs contamination.
基金Supported by the National Natural Science Foundation of China(20677070, 20621703)
文摘The concentrations and congener profiles of poly- chlorinated naphthalenes （PCNs） in surface sediment samples collected from the Yangtze and Yellow River Estuaries were inves- tigated. PCN congeners （from MoCNs to OCN） were determined by isotope dilution/high-resolution gas chromatography/high- resolution mass spectrometry （HRGC-HRMS）. The total concen- trations of PCNs were 34.3-303.0 pg/g （dry weight, dw） in the Yangtze Estuary samples and 6.2-408.0 pg/g （dw） in the Yellow River Estuary samples, which were lower compared with that in other sediments reported by previous studies. In addition, the re- markably different homologue or congener profiles of PCNs have been obtained in this study. Samples dominated with MoCNs to TrCNs might be attributed to atmospheric deposition and global fractionation, while in other samples taken from the surrounding industrial areas the enrichment of higher chlorinated homologues suggested that the industrial and human activities should be the main potential sources.
