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Polychlorinated naphthalenes in sewage sludge from wastewater treatment plants in China
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.ORCID iD: 0000-0002-5729-1908
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2014 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 490, p. 555-560Article in journal (Refereed) Published
Abstract [en]

Polychlorinated naphthalenes (PCNs) were nominated as persistent organic pollutants candidate in the Stockholm Convention in 2011. In this study, the profiles, concentrations and spatial distributions of PCNs were analyzed in 30 sewage sludge samples from wastewater treatment plants (WWTPs) in China. Concentrations of Σ75PCNs in sludge samples were in the range of 1.05-10.9 ng/g dry weight (dw) with a mean value of 3.98 ng/g dw. The predominant homologues in the sludge were mono- to tetra-CNs, accounting for approximately 85% of total PCNs. The total toxic equivalent quantities (TEQs) of dioxin-like PCN congeners ranged from 0.04 to 2.28 pg/g dw with a mean value of 0.36 pg/g dw, which were lower than the maximum permissible TEQ concentrations in sludge for land application in China. Levels of PCNs and TEQs in sludge were relatively higher in samples from highly industrialized and developed cities in eastern China, implying a possible link between PCN contamination and the local economic development, but more studies are warranted to corroborate this. Industrial sources might be important contributors of PCNs to sewage sludge in China.

Place, publisher, year, edition, pages
Elsevier, 2014. Vol. 490, p. 555-560
Keywords [en]
China, Polychlorinated naphthalene, Sewage sludge
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:oru:diva-38396DOI: 10.1016/j.scitotenv.2014.05.052ISI: 000347293800059PubMedID: 24880545Scopus ID: 2-s2.0-84901442052OAI: oai:DiVA.org:oru-38396DiVA, id: diva2:765038
Note

Sponsors:

National Key Basic Research Program of China  Grant no: 2014CB441105 

National Natural Science Foundation of China  Grant no:s 21222702  21337002 

Available from: 2014-11-21 Created: 2014-11-07 Last updated: 2018-06-11Bibliographically approved

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Wang, Thanh

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