Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russian Federation.
National Institute for R&D in Electrical Engineering ICPE-CA, Bucharest, Romania.
Environ Sci Pollut Res Int. 2021 Sep;28(33):44877-44889. doi: 10.1007/s11356-021-13752-6. Epub 2021 Apr 14.
Recent studies show that lanthanides (Ln) are becoming emerging pollutants due to their wide application in new technologies, but their environmental fate, transport, and possible accumulation are still relatively unknown. This study aims to determine major and trace elements including Ln in the Danube River sediment which either belong or close to the Iron Gate Reservoir. The Iron Gate Reservoir is characterized by accumulation of sediments as an effect of building hydropower dam Iron Gate I. The surface sediments were collected on the Danube River-1141 to 864 km and three tributaries along this waterway. Two samples of deep sediments were used for comparison. The results indicate the significant upward enrichment of Zn, Sb, Cr, Nd, and Dy in sediments belongs to the Iron Gate Reservoir. The sample 4-Smed is labelled as a hot spot of contamination with Zn, Cr, As, Sb, Nd, and Dy. Also, a trend of increasing concentration in the time period from 1995 to 2016 was found for elements Zn, Cr, and Ni in sediment samples in the Iron Gate Reservoir. Chemometric analysis shows the grouping of sample sites into clusters characterized by the following properties: (i) increased concentration of all measured elements (samples within the Iron Gate Reservoir); (ii) increased Cu concentration (11-Pek); and (iii) lower concentrations of the measured elements (deep sediments). The data presented hereby contribute to the monitoring of pollution of the River Danube sediments and give the first view of Ln profile in the studied sediments.
最近的研究表明，由于镧系元素（Ln）在新技术中的广泛应用，它们正在成为新兴的污染物，但它们的环境归宿、迁移和可能的积累仍然相对未知。本研究旨在确定多瑙河沉积物中的主要和微量元素，包括属于或接近铁门水库的镧系元素。铁门水库的特点是由于建造铁门一号水电站而导致沉积物的积累。表层沉积物采集于多瑙河 1141 至 864 公里处和这条水道的三个支流。使用了两个深部沉积物样本进行比较。结果表明，属于铁门水库的沉积物中 Zn、Sb、Cr、Nd 和 Dy 有明显的向上富集。样品 4-Smed 被标记为 Zn、Cr、As、Sb、Nd 和 Dy 的污染热点。此外，在 1995 年至 2016 年期间，铁门水库沉积物中 Zn、Cr 和 Ni 元素的浓度呈上升趋势。化学计量分析显示，样本点按以下特征分为聚类：（i）所有测量元素的浓度增加（铁门水库内的样本）；（ii）Cu 浓度增加（11-Pek）；以及（iii）测量元素的浓度降低（深部沉积物）。本文提供的数据有助于监测多瑙河沉积物的污染，并首次提供了研究沉积物中镧系元素分布的情况。
