N. Laverov Federal Center for Integrated Arctic Research of Ural Branch of the Russian Academy of Sciences, 109 Severnoj Dviny Emb., Arkhangelsk 163000, Russia.
N. Laverov Federal Center for Integrated Arctic Research of Ural Branch of the Russian Academy of Sciences, 109 Severnoj Dviny Emb., Arkhangelsk 163000, Russia.
Mar Pollut Bull. 2023 Sep;194(Pt B):115317. doi: 10.1016/j.marpolbul.2023.115317. Epub 2023 Jul 22.
The article is devoted to the study of trace metals content in the Pechora River and its tributaries, which is the largest river in the Arctic Ocean basin. The study of physico-chemical properties of water showed aerobic conditions of low-mineralised water with pH values suitable for drinking water. Analysis of the content of trace metals has revealed that the main flow of Al, Mn, Co, Cu, Zn, V, As, Mg and Fe into the Pechora River comes from its tributaries. The average content of Cr, Mn, Cu, Zn, Pb, V, As, Mg and Fe in the water of the Pechora River delta was higher than for the main river channel, which indicates the transfer of a large mass of trace metals to the Barents Sea and the Arctic water ecosystem. For the studied river and tributaries, chronic pollution of the Pechora River with Al, Mn, Ba, Fe, Cu, U and Pb metals has adverse effects on waterborne organisms. The degree of contamination of natural waters by metals has been assessed using water quality indices (TMPI, TMEI, TMTI) and public health risks (HI and CR). Low contamination and weak toxicity of the Pechora River water has been determined, but serious contamination, toxicity and high non-carcinogenic risk of some of its tributaries have been observed. A high carcinogenic risk has been established for the consumption of all water sampled. Al, Ni, As, Fe, Mn, Cr, Cd, and Ba were found to be the highest priority contaminating trace metals. At present, contamination of the Pechora River and its tributaries with trace metals is formed under the influence of dissolution processes of rocks of the Ural Mountains, the Taminsky Ridge, underlying mineral deposits, permafrost degradation processes and glacier melting. Anthropogenic factors include oil and gas production and transportation.
本文致力于研究北极洋盆地最大河流——佩乔拉河及其支流的微量元素含量。对水的物理化学性质的研究表明，这些水处于贫矿化的需氧状态，其 pH 值适合饮用水。对微量元素含量的分析表明，Al、Mn、Co、Cu、Zn、V、As、Mg 和 Fe 主要从其支流流入佩乔拉河。佩乔拉河三角洲水中 Cr、Mn、Cu、Zn、Pb、V、As、Mg 和 Fe 的平均含量高于主河道，这表明大量微量元素被转移到巴伦支海和北极水生态系统。对于研究中的河流和支流，Al、Mn、Ba、Fe、Cu、U 和 Pb 等金属对佩乔拉河的慢性污染对水生生物有不利影响。使用水质指数（TMPI、TMEI、TMTI）和公共健康风险（HI 和 CR）评估了金属对天然水的污染程度。确定了佩乔拉河水的污染程度低，毒性弱，但一些支流的污染程度严重，毒性强，非致癌风险高。所有采样水的消费均存在高致癌风险。发现 Al、Ni、As、Fe、Mn、Cr、Cd 和 Ba 是污染程度最高的优先污染物微量元素。目前，佩乔拉河及其支流的微量元素污染是在乌拉尔山脉、塔姆辛斯基岭岩石的溶解过程、地下矿床、多年冻土退化过程和冰川融化的影响下形成的。人为因素包括石油和天然气的生产和运输。
