Levels and distributions of polychlorinated naphthalenes in sewage sludge of urban wastewater treatment plants |
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Authors: | Guo Li Zhang Bing Xiao Ke Zhang QingHua Zheng MingHui |
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Affiliation: | (1) State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China |
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Abstract: | Over seventy congeners of polychlorinated naphthalenes (PCNs) in sewage sludge of 8 urban wastewater 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.
Supported by the National Natural Science Foundation of China (Grant Nos. 20677070 and 20621703) |
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Keywords: | sewage sludge polychlorinated naphthalenes(PCNs) high resolution gas chromatography/high resolution mass spectrometry(HRGC/HRMS) contributions profiles |
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