N. Laverov Federal Centre for Integrated Arctic Research of Russian Academy of Sciences, 109 Severnoj Dviny Emb., Arkhangelsk 163000, Russia.
N. Laverov Federal Centre for Integrated Arctic Research of Russian Academy of Sciences, 109 Severnoj Dviny Emb., Arkhangelsk 163000, Russia.
Mar Pollut Bull. 2022 Sep;182:113960. doi: 10.1016/j.marpolbul.2022.113960. Epub 2022 Aug 6.
The article is devoted to the study of the content of heavy metals in the bottom sediments of the estuary of the Pechora River, which is the largest river in the European Arctic of Russia. In addition to metals, the particle size distribution and physicochemical parameters of river sediments were analyzed, such as the content of carbonates, organics and ash components. Average concentrations of heavy metals in the sediments of the Pechora Delta sediment have been found to be significantly lower than terrestrial values. The assessment of pollution and toxicity of sediments in the Pechora delta, made using various parameters Igeo, Cf, Cd, EF and ERI, showed a low level of heavy metals in bottom sediments, coupled with a low level of environmental risk. Despite the fact that high concentrations of heavy metals of anthropogenic origin are continuously recorded in the water of the Pechora River, (almost throughout the entire length), there is no accumulation of pollutants in the sediments of the delta. Thus, the estuary of the Pechora River, unlike other large estuary systems, does not act as a filter or sediment trap, which contributes to the penetration of heavy metals deep into the Barents Sea and the widespread distribution of pollutants in the ecosystems of the Arctic.
本文致力于研究俄罗斯北极地区最大的河流——佩乔拉河河口底部沉积物中的重金属含量。除了金属元素外，还分析了河流沉积物的粒径分布和理化参数，如碳酸盐、有机物和灰分成分的含量。研究发现，佩乔拉三角洲沉积物中的重金属平均浓度明显低于陆地上的浓度。使用各种参数 Igeo、Cf、Cd、EF 和 ERI 对佩乔拉三角洲沉积物的污染和毒性进行评估，结果表明底泥中的重金属含量较低，同时环境风险也较低。尽管在佩乔拉河的水中（几乎在整个流域）不断记录到人为来源的重金属浓度很高，但三角洲沉积物中没有污染物的积累。因此，与其他大型河口系统不同，佩乔拉河口不是过滤器或沉积物陷阱，这有助于重金属深入巴伦支海，并在北极生态系统中广泛分布污染物。
