在这篇文章中,对确定选定重金属在水-底沉积物界面中的迁移和归宿的参数进行了多变量分析。.这项研究是在2019年夏季在Nielisz水库(波兰东南部,卢布林省)。最后,确定了一个以前未知的与有机物质量有关的因素。自生有机物被证明可以促进所研究重金属的积累。迄今为止,在科学文献中很少报道有机物的起源在保留储层中重金属的运输和命运的背景下的重要性。不止这些,该因素在底部沉积物中重金属沉积过程中不被认为是重要的组成部分。然而,事实证明,不仅仅是有机物的数量,而且其质量在保留水库生态系统中重金属的循环中起着重要作用。已发现,自生有机物会促进所研究重金属的积累。可以假设,在某种意义上,它起着悬链线(“枢纽”)的作用,控制着水-沉积物系统中重金属的命运。人们还推测,在某种意义上,OMS可能反映了水生维管植物(主要是C3组)对重金属同化的潜力。具有与C3组相似的光合途径的植物通常在13C同位素中的富集率要低得多(δ13C从-38‰到-22‰)。在我们的案例中,最低δ13C-TOCS值为-24.05‰,整个水库的平均值为-21.53‰。此外,观察到总有机碳δ13C-TOCS同位素组成的定量变化,与截留沉积物中研究的重金属含量变化相对应。
In this article, a multivariate analysis of the parameters determining the transport and fate of selected heavy metals in the water - bottom sediment interface was carried out. The studies were carried out in the summer season of 2019 at Nielisz Reservoir (southeastern Poland, Lublin Voivodeship). Finally, a previously unknown factor related to the quality of organic matter was identified. Autochthonous organic matter was shown to promote the accumulation of the studied heavy metals. To date, the significance of the origin of organic matter in the context of the transport and fate of heavy metals in retention reservoirs has rarely been reported in the scientific literature. More than that, this factor was not considered an important component in the process of heavy metal deposition in bottom sediments. However, it turns out that not only the quantity of organic matter, but also its quality plays an important role in the circulation of heavy metals in retention reservoir ecosystems. It was found that autochthonous organic matter promotes the accumulation of the studied heavy metals. It can be assumed that, in a sense, it plays the role of a catenary (\"hub\") controlling the fate of heavy metals in the water-sediment system. It has also been conjectured that, in a sense, OMS may reflect the potential for heavy metal assimilation by aquatic vascular plants (mainly of the C3 group). Plants with a photosynthetic pathway similar to the C3 group generally have a much lower enrichment in the 13C isotope (δ13C from -38‰ to -22‰). In our case, the lowest δ13C-TOCS value was -24.05‰, and the average for the whole reservoir was -21.53‰. In addition, it was observed that quantitative changes in the isotopic composition of total organic carbon δ13C-TOCS, corresponded with changes in the content of the heavy metals studied in entrapped sediments.