Abstract

The concentration of microplastic particles (with size from 100 µm to 5 mm) and their chemistry were studied in water, subsoils and sediments in the coastal area of the Neva Bay, the Gulf of Finland. The characteristics determined in the study were the dominating shapes of the particles, their size range, polymer chemistry and concentrations in different media, i.e., in water, bottom sediments, and coastal subsoils. Microplastic concentrations in bottom sediments and coastal subsoils are far in excess of their concentration in water mass. The spatial distribution of microplastic particles was studied in water, coastal subsoils, and bottom sediments of the Neva Bay, the Gulf of Finland. Microplastic concentration at the water edge was found to decrease with the distance from St. Petersburg City and Neva mouth, along either the northern or the southern coast. After reaching the Gulf of Finland, the Neva water, polluted by microplastic particles, is diluted and continues moving and distributing in accordance with the dominating westward hydrodynamic transport.

中文翻译：

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研究芬兰湾内娃湾沿岸地区水，底部沉积物和底土中的微尘颗粒浓度

摘要

研究了芬兰湾内娃湾沿海地区水，底土和沉积物中的微细塑料颗粒（尺寸为100 µm至5 mm）的浓度及其化学性质。该研究确定的特征是颗粒的主要形状，颗粒的大小范围，聚合物化学性质以及在不同介质（即水，底部沉积物和沿海地下土壤）中的浓度。底部沉积物和沿海地下土壤中的微塑性浓度远远超过其在水团中的浓度。在芬兰湾内娃湾的水，沿海底土和底部沉积物中研究了微塑性颗粒的空间分布。发现水边缘的微尘浓度随距圣彼得堡市和涅瓦河口的距离而降低，沿着北部或南部海岸。到达芬兰湾后，被微塑料颗粒污染的涅瓦河水被稀释，并根据主要的向西流体动力传输继续移动和分配。