ASSESSMENT OF RIVER SEDIMENT QUALITY ACCORDING TO THE EU WATER FRAMEWORK DIRECTIVE IN MOUNTAINOUS FLUVIAL CONDITIONS. A CASE STUDY IN THE UPPER TISA AREA, DANUBE RIVER BASIN

IF 0.9 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES
G. Damian, G. Iepure, Daniel Năsui, G. Jordan, Jasminka Alijagić, Danijel Ivanišević, L. Galović, Ioan Beres
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引用次数: 0

Abstract

Discharge of hazardous substances (HSs) in hydrographic basins represent a danger to aquatic biological activity and water supplies and can severely pollute surface water sediments. The increase of pollution in the Danube Basin requires the implementation of systematic monitoring and evaluation of the sediments quality as dictated by the EU Water Framework Directive. For this system development, applicable in mountainous conditions, the Upper Tisa region in the northwest part of Romania on the border with Ukraine, Hungary and Slovakia was selected as a test area. Sampling of overbank (floodplain) sediment, river bottom sediment and suspended sediment was carried out at 10 locations in the test area in order to analyze the concentration and distribution of eight metal(oid)s (Cu, Pb, Zn, Cd, Hg, Ni, Cr and As), in addition to 3 organic components (anthracene, fluoranthene, benzo(e)pyrene) as hazardous substances (HSs). The sediment quality assessment was carried out according to the 2013/39/EU Directive and EU Water Framework Directive standards. Most of the analyzed HS concentrations in river bottom sediment and overbank (floodplain) sediments fall within the limits of environmental quality standards (EQS). As, Cu, Pb, and Zn tend to exceed the EQS at some locations. The highest exceedances were recorded for Pb, for which contents of up to 987 mg/kg were detected. The highest contents were found in the overbank sediments sampled, and the lowest in river bottom sediments, which may indicate historical pollution. Mercury contents in overbank sediment samples exceed all standards, while cadmium content is below the international standards. Anthracene, fluoranthene and benzo(e)pyrene concentrations in overbank and bottom sediments comply with international standards. A few samples in suspended sediments slightly exceed the lowest environmental standard value (i.e., Romanian normal value). HS concentrations remain low in the suspended sediments showing that it is not the main transport route for pollution in this area. HS contents decrease gradually from upstream to downstream due to dilution along the river course. In the last testing point at Someș Aciua, the concentration of metal(oid)s measured in the sediments remain below the EQS limit values, thus there is no risk of transboundary pollution. The main source of metal(oid) contamination is historic base-metal ore mining and the associated mine waste sites in the Baia Mare and other mining areas scattered around the whole region. The main source of the studied organic compounds is the incomplete or low-temperature coal combustion processes that occur in households in rural areas
根据欧盟水框架指令对山区河流条件下的河流沉积物质量进行评估。多瑙河流域蒂萨河上游地区的个案研究
水文流域中有害物质的排放对水生生物活动和供水构成威胁,并可能严重污染地表水沉积物。多瑙河流域污染的增加要求按照欧盟水框架指令对沉积物质量进行系统监测和评估。对于适用于山区条件的系统开发,罗马尼亚西北部与乌克兰、匈牙利和斯洛伐克接壤的上蒂萨地区被选为试验区。在试验区的10个地点对河岸(漫滩)沉积物、河底沉积物和悬浮沉积物进行了采样,以分析8种金属(oid)(Cu、Pb、Zn、Cd、Hg、Ni、Cr和As)的浓度和分布,以及3种有机成分(蒽、荧蒽、苯并(e)芘)作为危险物质(HS)。沉积物质量评估是根据2013/39/EU指令和欧盟水框架指令标准进行的。河底沉积物和河漫滩沉积物中分析的大多数HS浓度都在环境质量标准(EQS)的范围内。As、Cu、Pb和Zn在某些位置往往超过EQS。铅超标率最高,检测到铅含量高达987毫克/公斤。取样的河岸沉积物中含量最高,河底沉积物中含量最低,这可能表明历史污染。河岸沉积物样品中的汞含量超过了所有标准,而镉含量低于国际标准。岸边和海底沉积物中蒽、荧蒽和苯并(e)芘的浓度符合国际标准。悬浮沉积物中的少数样品略高于最低环境标准值(即罗马尼亚正常值)。悬浮沉积物中的HS浓度仍然很低,这表明它不是该地区污染的主要输送途径。由于河道沿线的稀释作用,HS含量从上游到下游逐渐降低。在SomeșAciua的最后一个测试点,沉积物中测得的金属(oid)浓度仍低于EQS限值,因此没有跨界污染的风险。金属(oid)污染的主要来源是历史上的贱金属矿开采以及Baia Mare和整个地区其他矿区的相关矿山废料场。所研究的有机化合物的主要来源是农村家庭中发生的不完全或低温的煤炭燃烧过程
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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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