Spatial and vertical distributions of sedimentary halogenated polycyclic aromatic hydrocarbons in moderately polluted areas of Asia

The sedimentary halogenated (chlorinated and brominated) polycyclic aromatic hydrocarbons (Cl/BrPAHs), PAHs, and elements were analyzed to investigate contamination processes and sources. Assessments were conducted in sediments from three sites: surface sediments from the Yellow Sea and sediment cor...

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Bibliographic Details
Published in:Environmental pollution (1987) 2015-01, Vol.196, p.331-340
Main Authors: Ohura, Takeshi, Sakakibara, Hiroyuki, Watanabe, Izumi, Shim, Won Joon, Manage, Pathmalal M., Guruge, Keerth S.
Format: Article
Language:English
Subjects:
Asia
Assessments
ClPAHs
Clusters
Contaminants
Elements
Environmental Monitoring
Environmental Pollution - analysis
Geologic Sediments - chemistry
Halogenated
Halogenation
Hazardous Substances - analysis
Indicator
PAHs
Pollution sources
Polycyclic aromatic hydrocarbons
Polycyclic Aromatic Hydrocarbons - analysis
Principal component analysis
Sediment
Sediments
Water Pollutants, Chemical - analysis
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Summary:The sedimentary halogenated (chlorinated and brominated) polycyclic aromatic hydrocarbons (Cl/BrPAHs), PAHs, and elements were analyzed to investigate contamination processes and sources. Assessments were conducted in sediments from three sites: surface sediments from the Yellow Sea and sediment cores from Kandy Lake and Negombo Lagoon, Sri Lanka. Most of ClPAHs targeted were detected in all sediments. Spatial distributions of total ClPAH concentrations in the Yellow Sea showed the presence of multiple hot spots that differed from those of total PAHs. In Kandy and Negombo sediments, total ClPAH concentrations were slightly higher in surface layers than in bottom layers; the opposite trend was observed for PAHs. Principal component analysis showed that the clusters of most ClPAHs were similar to those of anthropogenically derived elements, but were far from those of PAHs. Consequently, ClPAHs in sediments appear to be persistent contaminants, which may make them appropriate as indicators of anthropogenic sources. [Display omitted] •ClPAHs are ubiquitous sedimentary contaminants.•Sedimentary distributions of ClPAHs were different from those of PAHs.•Sedimentary ClPAHs contaminants were attributed to anthropogenic sources.•Sedimentary ClPAHs can be indicators of anthropogenic sources. Sedimentary ClPAHs have a role in novel indicators of anthropogenic sources.
ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2014.10.028