Spatial and temporal trends of polychlorinated naphthalenes in the Arctic atmosphere at Ny-Ålesund and London Island, Svalbard

Gebru, Tariku Bekele; Li, Yingming; Dong, Cheng; Yang, Yuxin; Yang, Ruiqiang; Pei, Zhiguo; Zhang, Qinghua; Jiang, Guibin

doi:10.1016/j.scitotenv.2023.163023

Cited by 6 publications

(2 citation statements)

References 70 publications

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“…Thus, lower chlorinated homologues, i.e., Mono-to Tri-CNs, were the major contributors to PCN contamination in the polar benthic marine matrices, accounting for over 90% (on average) in both regions. This was consistent with our previous results of PCN homologue composition in the Arctic atmosphere and terrestrial environments, 23,45 suggesting the dominance of lower chlorinated homologues in polar PCN distribution. The occurrence of contaminants in the remote polar regions was largely sourced from long-range transport, which was more likely to occur for the lower chlorinated PCNs.…”

Section: Profiles Of Pcn Homologuessupporting

confidence: 93%

Occurrence and Trophic Transfer of Polychlorinated Naphthalenes (PCNs) in the Arctic and Antarctic Benthic Marine Food Webs

Dong,

Zhang,

Xiong

et al. 2023

Environ. Sci. Technol.

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Information about the occurrence and trophic transfer of polychlorinated naphthalenes (PCNs) in polar ecosystems is vital but scarce. In this study, PCNs were analyzed in benthic marine sediment and several biological species, collected around the Chinese polar scientific research stations in Svalbard in the Arctic and South Shetland Island in Antarctica. Total PCNs in biota ranged from 28 to 249 pg/g of lipid weight (lw) and from 11 to 284 pg/g lw in the Arctic and Antarctic regions, respectively. The concentrations and toxic equivalent (TEQ) of PCNs in polar marine matrices remained relatively low, and the compositions were dominated by lower chlorinated homologues (mono-to trichlorinated naphthalenes). Trophic magnification factors (TMFs) were calculated for congeners, homologues, and total PCNs in the polar benthic marine food webs. Opposite PCN transfer patterns were observed in the Arctic and Antarctic regions, i.e., trophic dilution and trophic magnification, respectively. This is the first comprehensive study of PCN trophic transfer behaviors in remote Arctic and Antarctic marine regions, providing support for further investigations of the biological trophodynamics and ecological risks of PCNs.

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Section: Profiles Of Pcn Homologuessupporting

confidence: 93%

Occurrence and Trophic Transfer of Polychlorinated Naphthalenes (PCNs) in the Arctic and Antarctic Benthic Marine Food Webs

Dong,

Zhang,

Xiong

et al. 2023

Environ. Sci. Technol.

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“…A recent monitoring study on mono‐ to octaCNs in the Arctic atmosphere in samples taken from Ny‐Ålesund and London Island, Svalbard from 2011 to 2019, showed on a declining time trend in concentrations after 2013. PCN‐1, PCN‐2, PCN‐24/14, PCN‐5/7 and PCN‐3 dominated the pattern during the study period, and the mean concentration of the sum of PCNs was 23.5 pg/m 3 (range 4.56–85.2 pg/m 3 ) (Gebru et al., 2023 ).…”

Section: Introductionmentioning

confidence: 99%

Risks for animal and human health related to the presence of polychlorinated naphthalenes (PCNs) in feed and food

Schrenk,

Bignami,

Bodin

et al. 2024

EFS2

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EFSA was asked for a scientific opinion on the risks for animal and human health related to the presence of polychlorinated naphthalenes (PCNs) in feed and food. The assessment focused on hexaCNs due to very limited data on other PCN congeners. For hexaCNs in feed, 217 analytical results were used to estimate dietary exposures for food-producing and non-food-producing animals; however, a risk characterisation could not be performed because none of the toxicological studies allowed identification of reference points. The oral repeated dose toxicity studies performed in rats with a hexaCN mixture containing all 10 hexaCNs indicated that the critical target was the haematological system. A BMDL 20 of 0.05 mg/kg body weight (bw) per day was identified for a considerable decrease in the platelet count. For hexaCNs in food, 2317 analytical results were used to estimate dietary exposures across dietary surveys and age groups. The highest exposure ranged from 0.91 to 29.8 pg/kg bw per day in general population and from 220 to 559 pg/kg bw per day for breast-fed infants with the highest consumption of breast milk. Applying a margin of exposure (MOE) approach, the estimated MOEs for the high dietary exposures ranged from 1,700,000 to 55,000,000 for the general population and from 90,000 to 230,000 for breast-fed infants with the highest consumption of breast milk. These MOEs are far above the minimum MOE of 2000 that does not raise a health concern. Taking account of the uncertainties affecting the assessment, the Panel concluded with at least 99% certainty that dietary exposure to hexaCNs does not raise a health concern for any of the population groups considered. Due to major limitations in the available data, no assessment was possible for genotoxic effects or for health risks of PCNs other than hexaCNs.

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Analytical methods for determining organic compounds in air

Hoang,

Takahashi

2025

Sample Handling and Trace Analysis of Pollutants

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Spatial and temporal trends of polychlorinated naphthalenes in the Arctic atmosphere at Ny-Ålesund and London Island, Svalbard

Cited by 6 publications

References 70 publications

Occurrence and Trophic Transfer of Polychlorinated Naphthalenes (PCNs) in the Arctic and Antarctic Benthic Marine Food Webs

Occurrence and Trophic Transfer of Polychlorinated Naphthalenes (PCNs) in the Arctic and Antarctic Benthic Marine Food Webs

Risks for animal and human health related to the presence of polychlorinated naphthalenes (PCNs) in feed and food

Analytical methods for determining organic compounds in air

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