Southern Federal University, Rostov-on-Don, Russian Federation, 344090.
Environ Geochem Health. 2023 Dec;45(12):9267-9280. doi: 10.1007/s10653-022-01281-1. Epub 2022 May 11.
PAHs are one of the most toxic organic compounds classes which is obligatory controlled all over the world. There is a luck of studies devoted to the PAHs levels and sources identification in the south of Russia. The features of the PAHs accumulation and spatial distribution in hydromorphic soils (Fluvisol) were studied on the example of the soils of the Don River delta floodplain landscapes. It has been shown that changes in the PAHs content in soils depended on the type and intensity of the emission source. A factor analysis and multivariate linear regression analysis were carried out to determine the features of the spatial distribution for individual PAH compounds, considering the properties of soils and typical differences in the emission source. The most polluted areas in the studied area located along the transit line of the long-distance tankers, where the content of the most toxic high molecular PAHs compounds reached 8862 ng g. As a result of regression analysis, a relationship was established between the PAHs accumulation rate with the content of silt (particles less than 0.001 mm in size) and Ca and Mg exchangeable cations in the soil (at p-level < 0.0001). Differences in individual PAH content for medium and heavy loamy Fluvisol and depend on the influence of different types of pollution sources.
多环芳烃是世界范围内必须加以严格控制的最具毒性的有机化合物之一。关于俄罗斯南部地区多环芳烃的水平和来源识别的研究还很少。本研究以顿河三角洲泛滥平原景观的土壤为例，研究了水成土壤（潜育土）中多环芳烃的积累和空间分布特征。结果表明，土壤中多环芳烃含量的变化取决于排放源的类型和强度。为了确定个别多环芳烃化合物的空间分布特征，考虑到土壤性质和典型排放源的差异，进行了因子分析和多元线性回归分析。在研究区域中，污染最严重的地区位于长途油轮的过境线路沿线，此处最有毒的高分子多环芳烃化合物的含量达到 8862ng/g。通过回归分析，建立了多环芳烃积累速率与土壤中粉土（粒径小于 0.001mm 的颗粒）和 Ca、Mg 可交换阳离子含量之间的关系（p 值<0.0001）。中、重壤土潜育土中个别多环芳烃含量的差异取决于不同类型污染源的影响。
