Concentrations and Isomer Compositions of Polychlorinated Biphenyls(PCBs) in Tidal Flat Sediments from the Ariake Sea and their Implications for Sources and Distribution.

Nakata, Haruhiko; Miyawaki, Takashi; Sakai, Yasufumi

doi:10.5985/jec.12.127

Cited by 9 publications

(5 citation statements)

References 8 publications

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“…Greater proportion of hepta-CBs (CB-180, 187) and smaller compositions of tetraand penta-CBs found in finless porpoises suggest biodegradation of lower chlorinated congeners in marine mammals, as has been indicated previously (26). Lower chlorinated congeners, such as CB-28+31 and 18 were prevalent in sediments, which was in accordance with those reported in sediments from different locations in the Ariake Sea (27). In contrast, this congener profile is different from those observed in sediments from Tokyo Bay (28) and Incheon Harbor (29) in which tetra-, penta-and hexa-CBs contributed to a greater proportion of the total PCBs.…”

Section: Resultssupporting

confidence: 89%

Bioaccumulation and Toxic Potencies of Polychlorinated Biphenyls and Polycyclic Aromatic Hydrocarbons in Tidal Flat and Coastal Ecosystems of the Ariake Sea, Japan

Nakata

Sakai

Miyawaki

et al. 2003

Environ. Sci. Technol.

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127

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Sediment and marine biota comprising several species of tidal flat and coastal organisms were analyzed for polychlorinated biphenyls (PCBs) including non- and mono-ortho coplanar congeners and polycyclic aromatic hydrocarbons (PAHs) to examine bioaccumulation profiles and toxic potencies of these contaminants. Concentrations of PCBs in tidal flat organisms ranged from 3.6 ng/g (wet wt) in clams to 68 ng/g (wet wt) in omnivore tidal flatfishes, a discernible trend reflecting concentrations and trophic levels. In contrast, PAHs concentrations were the highest in lower trophic organisms, such as crabs and lugworms from tidal flat, whereas those in coastal fishes, squid, and finless porpoises were less than detection limit. Greater bioaccumulation of PAHs was found in lugworms and crabs, which might be due to their direct ingestion of sediment particulates absorbed with PAHs. TCDD toxic equivalents (TEQs) were calculated for PCBs and PAHs in sediments and biota. PCBs accounted for a greater proportion of total TEQs (sum(TEQs): sum of TEQ(PCB) and TEQ(PAH)) in coastal and tidal flatfishes (>95%), while PAHs occupied a considerable portion of sum(TEQs) in sediment (>97%). Interestingly, TEQ(PAH) accounted for 37% and 81% of the sum(TEQs) in crabs and clams, respectively. Benzo[b]fluoranthene was the dominant contributor to TEQ(PAH) in both the species. Considering these observations, the environmental risks of PAHs may not be ignored in benthic tidal flat organisms due to their greater bioaccumulation through sediments.

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Section: Resultssupporting

confidence: 89%

Bioaccumulation and Toxic Potencies of Polychlorinated Biphenyls and Polycyclic Aromatic Hydrocarbons in Tidal Flat and Coastal Ecosystems of the Ariake Sea, Japan

Nakata

Sakai

Miyawaki

et al. 2003

Environ. Sci. Technol.

Self Cite

127

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“…In a previous report, the PCB concentrations in sea sediments at similar sites (the tidal flat sediments in Ariake Sea) in 1999-2000 were 0.030 µg/g. 19) River sediments (sub-microgram level) contained higher PCB concentrations than sea sediments and our results in this area showed the same trend. Moreover, the local study on PCB levels in a limited part of Nagasaki Bay (site A-3), was performed in 1983 by Maruyama et al, 25) where an adjacent shipyard was one of the PCB sources.…”

Section: Concentration Level Of Pcbs In the Sedimentssupporting

confidence: 84%

“…In a previous report, KC300 and 400 were presumed to be the source of contamination of PCBs by a fingerprint method. 19) In the fingerprint method, correlation coefficiency between the congeners content in sample and Kanechlors was calculated. This finding agreed well with the results in our study.…”

Section: Determination Of the Source Contribution By A Cmb Methodsmentioning

confidence: 99%

“…[11][12][13][14] Furthermore, many studies for determination of PCBs in sediments have been performed at various places in Japan such as Okinawa, 15) Sendai Bay, 16) Tokyo Bay, 17) Lake Suwa 18) and Ariake Sea. 19) To understand local pollution levels and the spatial distribution of PCBs, monitoring of PCBs in sediments is necessary. However, there is little available information to estimate PCB pollution in Nagasaki Prefecture.…”

Section: Introductionmentioning

confidence: 99%

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Concentration and Characteristics of Polychlorinated Biphenyls in the Sediments of Sea and River in Nagasaki Prefecture, Japan

Honda

Wada

Nakashima

2008

JOURNAL OF HEALTH SCIENCE

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Environmental pollution with polychlorinated biphenyls (PCBs) continues in Japan due to their high persistency, although their manufacture and use have already been prohibited. In this study, PCBs in sediments at 67 sites in Nagasaki Prefecture were determined by GC-MS, and their profiles were compared with those of commercial PCBs (Kanechlor KC300-600). The concentrations of PCBs in the sediments of sea and river areas in Nagasaki Prefecture were found to be up to 2.5 and 0.035 µg/g, respectively. Higher concentrations of PCBs in the sediments of the sea compared to those from river were observed (except area D vs N). The profile of PCB homologues in the sediments of the sea areas was similar to that of Kanechlor KC600, whereas the profile of PCB homologues in the river sediments was similar to that of Kanechlor KC500. Moreover, the source contribution was estimated by a chemical mass balance (CMB) method using the composition ratio of major congeners of Kanechlor. As a result, it was found that the contributions of KC600 and KC500 were higher in sea sediments (ca. 60%) than in river sediments (ca 50%).

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“…However, it should be considered that high chlorinated PCBs with relatively high K ow values are more stable than low chlorinated PCBs in sediment by adsorbing to suspended particles [6,33]. Moreover, the K ow value of PCB congeners was significantly related to biotasediment accumulation factors (BSAFs) and the high chlorinate PCB congeners were likely to retain in sediments [34,35]. Therefore, the calculated data of PCBs K ow in the sediment samples, KC products and emission gas was used in this study (Fig.…”

Section: Source Identification Of Coplanar Pcbs In the Sediment Corementioning

confidence: 99%

The characterization of PCDDs, PCDFs and coplanar PCBs during the past 50 years in Gwangyang Bay, South Korea

Kim

Eun

Cho

et al. 2008

Journal of Hazardous Materials

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Concentrations and Isomer Compositions of Polychlorinated Biphenyls(PCBs) in Tidal Flat Sediments from the Ariake Sea and their Implications for Sources and Distribution.

Cited by 9 publications

References 8 publications

Bioaccumulation and Toxic Potencies of Polychlorinated Biphenyls and Polycyclic Aromatic Hydrocarbons in Tidal Flat and Coastal Ecosystems of the Ariake Sea, Japan

Bioaccumulation and Toxic Potencies of Polychlorinated Biphenyls and Polycyclic Aromatic Hydrocarbons in Tidal Flat and Coastal Ecosystems of the Ariake Sea, Japan

Concentration and Characteristics of Polychlorinated Biphenyls in the Sediments of Sea and River in Nagasaki Prefecture, Japan

The characterization of PCDDs, PCDFs and coplanar PCBs during the past 50 years in Gwangyang Bay, South Korea

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