Northern (Arctic) Federal University named after M.V. Lomonosov, Northern Dvina Emb., 17, Arkhangelsk 163002, Russia.
Northern (Arctic) Federal University named after M.V. Lomonosov, Northern Dvina Emb., 17, Arkhangelsk 163002, Russia.
Mar Pollut Bull. 2024 May;202:116310. doi: 10.1016/j.marpolbul.2024.116310. Epub 2024 Apr 2.
The Northern Dvina River is one of the main sources of microplastic pollution entering to the White and Barents Seas. The coastal and bottom sediments of this river play an important role as a transfer link of microplastics. With Py-GC/MS and μFT-IR methods, it was found that the sediments contain up to 350 mg/kg or 650 particles/kg of microplastic (dry weight). The unique hydrologic conditions of the river branching area contribute to the formation of a microplastic pollution hotspot. The hotspot accumulates >30 % of microplastic pollution, mainly ABS plastic particles smaller than 0.3 mm with roughness and cracks, which increases the hazard class (from II to IV) of microplastic pollution. Obtained data and high annual variability of pollution indicates that this area acts as a place of accumulation, degradation and gradual release of microplastics into the White and Barents Seas, i.e. into the Arctic region.
北德维纳河是进入白海和巴伦支海的主要微塑料污染来源之一。该河的沿海和底泥沉积物作为微塑料的转移环节起着重要作用。通过 Py-GC/MS 和 μFT-IR 方法发现，沉积物中含有高达 350mg/kg 或 650 个/千克的微塑料（干重）。该河流分岔区域独特的水文条件促成了微塑料污染热点的形成。该热点积聚了超过 30%的微塑料污染，主要是 ABS 塑料颗粒，小于 0.3 毫米，具有粗糙度和裂缝，将微塑料污染的危害等级（从 II 级提高到 IV 级）。获得的数据和高年度变异性表明，该地区是微塑料在白海和巴伦支海，即北极地区的积累、降解和逐渐释放的场所。
