Spatial and seasonal occurrence of micropollutants in four Portuguese rivers and a case study for fluorescence excitation-emission matrices
Spatial and seasonal occurrence of micropollutants in four Portuguese rivers and a case study for fluorescence excitation-emission matrices
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DOI：
10.1016/j.scitotenv.2018.06.355
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发表时间：
2018-12-10
影响因子：
9.8
通讯作者：
Silva, Adrian M. T.
中科院分区：
文献类型：
--
作者：
Barbosa, Marta O.;Ribeiro, Ana R.;Silva, Adrian M. T.
欧洲联盟(欧盟)建议监测地表水体中的特定优先物质(PSS，第2013/39号指令)和一些新出现的令人关注的污染物(CECs，第2015/495号决定)。本研究提供了葡萄牙四条受压河流(Ave、Leca、Antua和Certima)中各种多类PSS和CEC的空间分布和时间变化。在所有四条河流中都发现了13种微污染物，包括优先农药异丙隆(最多92 ng L-1)、各种药品(最多396 ng L-1)和紫外线过滤器2-乙基己基-4-甲氧基肉桂酸酯(EHMC，最多562 ng L-1)。在方法定量限值以下的三条河流(安图阿、Certima和Leca)中发现了工业优先化合物全氟辛烷磺酸(PFOS)，以及四种未包括在这些欧盟指南中的药物。已禁用的优先杀虫剂阿特拉津在艾维、安图阿和莱卡检出(最高41 ng L-1)，西马津在Certima和莱卡(最高26 ng L-1)中检出。除虫菊酯和吡虫啉(包括在第2015/495号决定中)只在林荫大道的旱季检测到。以勒卡河为例进行了荧光激发发射矩阵(EMM)的研究。这些结果符合微污染物沿河流的空间分布趋势，在工业区和城市污水处理厂(WWTP)下游发现了更强的荧光响应和更高的浓度。此外，市区污水处理厂下游收集的地表水的荧光特征与相应污水处理厂流出的污水的荧光特征非常吻合。因此，需要采取行动保护这些受到压力的欧洲水体的良好环境状况。(C)2018爱思唯尔B.V.保留所有权利。
The European Union (EU) has recommended the monitoring of specific priority substances (PSs, Directive 2013/39) and some contaminants of emerging concern (CECs, Decision 2015/495) in surface waterbodies. The present study provides spatial distributions and temporal variations of a wide range of multi-class PSs and CECs in four stressed rivers in Portugal (Ave, Leca, Antua, and Certima). Thirteen micropollutants were found in all four rivers, including the priority pesticide isoproturon (up to 92 ng L-1), various pharmaceuticals (up to 396 ng L-1), and the UV-filter 2-ethyl-hexyl-4-methoxycinnamate (EHMC, up to 562 ng L-1) identified in Decision 2015/495. The industrial priority compound perfluorooctanesulfonic acid (PFOS) was found in three rivers (Antua, Certima, and Leca) below the method quantification limit, together with four pharmaceuticals not included in these EU guidelines. The already banned priority pesticide atrazine was detected in Ave, Antua, and Leca (up to 41 ng L-1) and simazine in Certima and Leca (up to 26 ng L-1). Acetamiprid and imidacloprid (included in Decision 2015/495) were only detected during the dry season in the Ave. Leca river was selected as a waterbody case study for assessment of fluorescence excitation-emission matrices (EEMs). These results matched the spatial distribution trend of micropollutants along the river, with stronger fluorescence response and higher concentrations being found downstream of industrial areas and urban waste water treatment plants (WWTPs). Moreover, the fluorescence signature of surface water collected downstream of an urban WWTP aligned very well with that obtained for the respective WWTP effluent. Thus, actions are needed to preserve a good environmental status of these stressed European waterbodies. (c) 2018 Elsevier B.V. All rights reserved.