Abstract

Aliphatic and polycyclic aromatic hydrocarbons have been studied in suspended matter and bottom sediments at the geochemical barrier the Northern Dvina–Dvina Bay during spring flood and low-water season. The increase in the concentrations during spring flood (for aliphatic hydrocarbons, on the average, 154 µg/L) compared with those during low-water season (on the average, 52 µg/L) has been shown to be short-time. The losses of hydrocarbons at this geochemical barrier are governed by variations of water salinity, river flow, and lunar phases and can reach 96% (August 2017). The composition of alkanes and polycyclic aromatic hydrocarbons in river water mostly showed the predominance of petroleum components. In the course of sedimentation and as salinity increases, petroleum hydrocarbons decompose, making their effect beyond the gravitational part of the marginal filter of the Northern Dvina minor. The effect of redox processes in the sediment stratum on hydrocarbon distributions is stronger than that on C_org.

中文翻译：

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北德维纳-白海地球化学屏障的碳氢化合物

摘要

在春季洪水和淡水季节，研究了北德维纳-德维纳湾地球化学屏障中悬浮物和底部沉积物中的脂族和多环芳烃。春季洪水期间的浓度（脂肪烃平均为154 µg / L）与淡水季节的浓度（平均为52 µg / L）相比增加是短暂的。在该地球化学屏障处的碳氢化合物损失受水盐度，河流流量和月相变化的影响，可能达到96％（2017年8月）。河水中的烷烃和多环芳烃的组成大部分显示出石油成分占主导地位。在沉积过程中，随着盐分的增加，石油碳氢化合物会分解，使其作用超出北德维纳（Dvina）未成年人边缘过滤器的重力部分。沉积物层中的氧化还原过程对碳氢化合物分布的影响要强于碳的分布_org。