Do trans-Pacific air masses deliver PBDEs to coastal British Columbia, Canada?

Noël, Marie; Dangerfield, Neil; Hourston, Roy A. S.; Belzer, Wayne; Shaw, Patricia; Yunker, Mark B.; Ross, Peter S.

doi:10.1016/j.envpol.2009.06.025

Cited by 35 publications

(29 citation statements)

References 47 publications

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“…Therefore, additional data are warranted for a better estimation of the surface runoff loadings and atmospheric deposition loads. Nevertheless, it is worth noting that the estimated atmospheric PBDE loadings in the Puget Sound Basin derived from this study are very similar to the recently reported value for the Strait of Georgia (17.1±6.5 Kg/yr; Noël et al 2009). Considering the similar surface area of Puget Sound and the Strait of Georgia (7285 and 8900 km 2 , respectively), the overall fluxes of atmospheric deposition on these two vicinal water bodies are also similar.…”

Section: Mass Loading Estimates For Pbdessupporting

confidence: 72%

Control of Toxic Chemicals in Puget Sound, Phase 3: Study of Atmospheric Deposition of Air Toxics to the Surface of Puget Sound

Brandenberger¹,

Louchouarn²,

Kuo³

et al. 2010

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Section: Mass Loading Estimates For Pbdessupporting

confidence: 72%

Control of Toxic Chemicals in Puget Sound, Phase 3: Study of Atmospheric Deposition of Air Toxics to the Surface of Puget Sound

Brandenberger¹,

Louchouarn²,

Kuo³

et al. 2010

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“…Although depuration and metabolic processes can deplete the food web of, for example, lighter PCBs, the effect of a distillation of PCBs away from sources is evident in the Northeast Pacific Ocean. Lower PCB and PBDE concentrations, as well as lighter patterns, were detected in air samples collected on the more remote west coast of Vancouver Island relative to those in the Strait of Georgia [36]. Contaminant signatures in harbor seals sampled along a gradient away from the heavily industrialized Puget Sound, through the moderately industrialized Strait of Georgia, and into the more remote Queen Charlotte Strait, reveal an increasingly light PCB pattern, which correlates with log H (Henry's law constant) [37].…”

Section: Pcb and Pbde Patterns In Sedimentsmentioning

confidence: 92%

Environmental fractionation of PCBs and PBDEs during particle transport as recorded by sediments in coastal waters

Grant

Johannessen

Macdonald

et al. 2011

Enviro Toxic and Chemistry

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The Strait of Georgia (British Columbia, Canada) is a hydrologically complex inland sea with a rich abundance and diversity of species of aquatic life. Marine sediments, as both a sink for hydrophobic contaminants and a potential source for aquatic food webs, were collected from 41 sites throughout the 6,900-km(2) Strait of Georgia. The congener-specific concentrations of polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs), including BDE-209, were measured. Urban harbors represented hotspots for both PCBs and PBDEs, whereas PBDEs were also found at high concentrations near municipal outfalls. Patterns of PCB distribution were consistent with historical point source emissions in urban areas and environmental distillation toward lighter profiles in remote sites over time. The single congener BDE-209 dominated the PBDEs, accounting for 52% of the average total concentration. However, nonurban deep-water sediment PBDE profiles were both heavier and had higher concentration-weighted average log K(OW) (octanol-water partition coefficient) values compared to shallow samples (percent BDE-209 of total PBDE, 66 versus 32%; log K(OW) , 9.5 versus 8.2, respectively). Collectively, our results suggest that although source signals largely explain PCB and PBDE hotspots in the Strait of Georgia, the combination of physicochemical properties and environmental processes drive divergent compositional fates for the PCBs and the heavier PBDEs in the sediments of the Strait of Georgia.

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“…This finding suggests that the Vancouver Island region, and especially WCVI, is appreciably more contaminated by PBDEs than regions further north. PBDE contamination at WCVI may reflect proximity to the Vancouver and Seattle conurbations, and the possibility that heavy local precipitation may introduce atmospherically borne PBDEs from Asia [19]. In chinook, the more southern samples often had lower proportions of lower brominated congeners (<BDE 47) than did samples taken from BS-A chinook, as did sablefish from GA compared to those from SEA.…”

Section: Spatial Trendsmentioning

confidence: 98%

Residues of PBDEs in northeastern Pacific marine fish: Evidence for spatial and temporal trends

Ikonomou

Teas

Gerlach

et al. 2011

Enviro Toxic and Chemistry

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In the flesh (skinless fillet) of chinook, chum, coho, pink, and sockeye salmon (Oncorhynchus tshawytscha, O. keta, O. kisutch, O. gorbuscha, and O. nerka, respectively), sablefish (Anoplopoma fimbria) and walleye pollock (Theragra chalcogramma) from several sites in the northeast Pacific sampled between 2002 and 2008, tetra- and pentabrominated diphenyl ethers (BDEs) (BDE 47, 49, 99, and 100) dominated the congener distribution. Chinook and sablefish contained the highest concentrations, followed by sockeye, coho, and pink salmon, and pollock. In sockeye from the Bering Sea - Aleutians and from the Gulf of Alaska, total tri- to hepta-BDE concentrations fell significantly between 2002 and 2005; in sablefish from Gulf of Alaska, there was a steady but statistically nonsignificant decline in BDE concentrations between 2002 and 2008. Relative proportions of the main BDE congeners did not change appreciably over time, within species or location. All species except sockeye salmon showed a clear southeastward increase in BDE concentrations, implying an increasing gradient in general ecosystem contamination. In chinook, coho, and sablefish, especially, the southeastward trend in increasing total concentrations was associated with increasing proportions of BDEs 47 and 100. Chinook returning to western North American natal streams appeared to accumulate most of their PBDE burden towards the end of their migration. Fish from more northern sampling sites often had higher proportions of more highly brominated congeners than those from more southern sites, perhaps reflecting contamination from Asian sources where higher-brominated commercial PBDE formulations are used. In sablefish and pollock, the relative proportions of BDEs 99 and 47 varied inversely in almost a 1:1 ratio, implying debromination of BDE 99 to 47.

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Do trans-Pacific air masses deliver PBDEs to coastal British Columbia, Canada?

Cited by 35 publications

References 47 publications

Control of Toxic Chemicals in Puget Sound, Phase 3: Study of Atmospheric Deposition of Air Toxics to the Surface of Puget Sound

Control of Toxic Chemicals in Puget Sound, Phase 3: Study of Atmospheric Deposition of Air Toxics to the Surface of Puget Sound

Environmental fractionation of PCBs and PBDEs during particle transport as recorded by sediments in coastal waters

Residues of PBDEs in northeastern Pacific marine fish: Evidence for spatial and temporal trends

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