ASSESSMENT OF RIVER SEDIMENT QUALITY ACCORDING TO THE EU WATER FRAMEWORK DIRECTIVE IN LARGE RIVER FLUVIAL CONDITIONS. A CASE STUDY IN THE LOWER DANUBE RIVER BASIN

IF 0.9 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES Carpathian Journal of Earth and Environmental Sciences Pub Date : 2023-02-22 DOI:10.26471/cjees/2023/018/251
A. Hikov, A. Vîjdea, I. Peytcheva, G. Jordan, P. Marjanović, Z. Milakovska, P. Filipov, Milena Vetseva, A. Baltres, V. Alexe, L. Balan, Marko Marjanović, V. Cvetkovic, Kristina Šarić
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Abstract

Increase of pollution of surface water and water sediments with hazardous substances (HSs) in the Danube River Basin requires implementation of systematic monitoring and evaluation of the sediment quality. The present study is focused on the ’South Danube’ Test Area (SDTA) that covers parts of the Lower Danube Basin in Romania, Serbia and Bulgaria. The SD area represents an extended region where Danube reaches its largest widths and depths and where pollution (industrial, mining, agricultural, waste etc.) from tributaries and land is supposed to accumulate in the sediments. Sampling of river bottom sediment (BS), suspended sediment (SS) and overbank (floodplain) sediment at two layers (0-5 cm in the top layer (FS TS) and 40-50 cm in the bottom layer (FS BS)), was carried out at 11 locations in order to analyze the concentration and distribution of 8 metal(oid)s (Cu, Pb, Zn, Cd, Hg, Ni, Cr, As), 6 polycyclic aromatic hydrocarbons (PAHs) and 6 pesticides as hazardous substances. The 2013/39/EU Directive and EU Water Framework Directive standards were used to sediment quality assessment. As a whole, the concentrations of heavy metals in the sediments are comparatively low and are around the normal values for soils. On the other hand, some sampling sites and sediment types have high or very high metal concentrations which exceed intervention levels. Our study well recognizes mining pollution sources in the Danube tributaries Borska Reka, Timok, Ogosta, Malak Iskar and Iskar from past and/or recent mining activity. This pollution is limited to the Danube tributaries and around their confluences into the Danube River. The concentration of heavy metals is strongly diluted in the Danube River and drops around normal values. The studied sediments reveal low concentrations of PAHs. Only fluoranthene content is higher in most of the sediment types and sampling sites on the Danube River, but exceeds the interventional level only at Pristol and at Hârșova. Our results show that the sediments in the Danube River are more polluted with PAHs than its tributaries. The identified organic compounds are assumed to be generated during incomplete or low temperature combustion processes or during road transportation and/or the navigation on the Danube River.
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根据欧盟水框架指令在大型河流条件下评估河流沉积物质量。多瑙河下游流域的个案研究
多瑙河流域地表水和水沉积物中有害物质污染的增加要求对沉积物质量进行系统监测和评估。本研究的重点是“南多瑙河”试验区(SDTA),该试验区覆盖了罗马尼亚、塞尔维亚和保加利亚的下多瑙河流域的部分地区。SD区域代表了多瑙河达到最大宽度和深度的延伸区域,支流和土地的污染(工业、采矿、农业、废物等)可能会积聚在沉积物中。为了分析8种金属(oid)(Cu、Pb、Zn、Cd、Hg、Ni、Cr、As)的浓度和分布,在11个地点对河底沉积物(BS)、悬浮沉积物(SS)和河漫滩沉积物(泛滥平原)的两层(表层0-5cm(FS TS)和底层40-50cm(FS BS))进行了采样,6种多环芳烃(PAHs)和6种农药作为危险物质。2013/39/EU指令和欧盟水框架指令标准用于沉积物质量评估。总的来说,沉积物中的重金属浓度相对较低,接近土壤的正常值。另一方面,一些采样点和沉积物类型的金属浓度很高或非常高,超过了干预水平。我们的研究很好地识别了多瑙河支流Borska Reka、Timok、Ogosta、Malak Iskar和Iskar的采矿污染源,这些污染源来自过去和/或最近的采矿活动。这种污染仅限于多瑙河支流及其汇入多瑙河的交汇处周围。多瑙河中的重金属浓度被强烈稀释,并下降到正常值附近。研究沉积物显示PAHs浓度较低。在多瑙河的大多数沉积物类型和采样点中,只有荧蒽含量较高,但仅在普里斯托尔和Hârșova超过了干预水平。我们的研究结果表明,多瑙河的沉积物比其支流更容易受到多环芳烃的污染。已鉴定的有机化合物被认为是在不完全或低温燃烧过程中,或在公路运输和/或多瑙河航行过程中产生的。
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来源期刊
CiteScore
2.30
自引率
25.00%
发文量
42
审稿时长
12-24 weeks
期刊介绍: The publishing of CARPATHIAN JOURNAL of EARTH and ENVIRONMENTAL SCIENCES has started in 2006. The regularity of this magazine is biannual. The magazine will publish scientific works, in international purposes, in different areas of research, such as : geology, geography, environmental sciences, the environmental pollution and protection, environmental chemistry and physic, environmental biodegradation, climatic exchanges, fighting against natural disasters, protected areas, soil degradation, water quality, water supplies, sustainable development.
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