School of Environmental Sciences, Mahatma Gandhi University, Kerala 686560, India.
National Centre for Polar and Ocean Research, Ministry of Earth Sciences, Goa 403802, India.
Mar Pollut Bull. 2022 Jan;174:113277. doi: 10.1016/j.marpolbul.2021.113277. Epub 2022 Jan 5.
Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) are highly toxic organic compounds, and very few studies on their presence in polar environments have been conducted. This study assessed the concentration and distribution of PCDD/Fs, dioxin-like polychlorinated biphenyls (DL-PCBs), and non-dioxin-like polychlorinated biphenyls in selected fjords of the Svalbard archipelago in Norway. The ∑PCDD/Fs observed for Raudfjorden, Smeerenburgfjorden, Magdalenefjorden, and Kongsfjorden were 22.80 pg/g, 25.65 pg/g, 18.27 pg/g, 33.50 pg/g, and 21.69 pg/g, respectively. The WHO's toxic equivalents values of both ∑PCDD/Fs and ∑DL-PCBs were comparatively higher than those reported in other polar regions. Of the four fjords studied, the sediments from Kongsfjorden exhibited the presence of the most toxic materials, including PCB-126 and PCB-169, of DL-PCBs. More than 80% of the total analysed PCDD/Fs were comprised of highly chlorinated congeners (hexa-to-octa forms). More studies are required to understand the destination and transport of these hazardous pollutants in high Arctic sediments.
多氯二苯并对二恶英和多氯二苯并呋喃（PCDD/Fs）是剧毒有机化合物，目前针对其在极地环境中存在情况的研究非常少。本研究评估了挪威斯瓦尔巴群岛部分峡湾中 PCDD/Fs、类二恶英多氯联苯（DL-PCBs）和非类二恶英多氯联苯的浓度和分布。劳德峡湾、斯梅伦伯格峡湾、马格达莱纳峡湾和孔斯峡湾中检测到的∑PCDD/Fs 分别为 22.80 pg/g、25.65 pg/g、18.27 pg/g、33.50 pg/g 和 21.69 pg/g。∑PCDD/Fs 和∑DL-PCBs 的世界卫生组织毒性当量值均明显高于其他极地地区的报告值。在所研究的四个峡湾中，孔斯峡湾的沉积物中存在最毒的物质，包括 DL-PCBs 中的 PCB-126 和 PCB-169。在所分析的 PCDD/Fs 中，超过 80%是高氯同系物（六氯至八氯形式）。需要进一步研究以了解这些危险污染物在高北极沉积物中的归宿和传输。
