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首页> 外文期刊>Environmental Science & Technology >Spatial Differences among Micropollutants in Sewer Overflows: A Multisite Analysis Using Passive Samplers
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Spatial Differences among Micropollutants in Sewer Overflows: A Multisite Analysis Using Passive Samplers

机译：下水道溢出中微污染物之间的空间差异：使用被动采样器进行多路分析

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摘要

Untreated sewer overflows can contaminate receiving waters with micropollutants. Although concentrations of discharged micropollutants can be ecotoxicologically relevant, only limited data is available to assess occurrence and spatial differences among sewer overflow catchments. Therefore, we present an innovative type of data obtained with passive samplers at 20 combined sewer overflow sites (2-7 events per site; 95 events in total). The data sheds light on concentration ranges for 13 representative polar organic micropollutants and shows that micropollutants in both municipal wastewater and stormwater can be relevant sources of contaminants. We identify indicator micropollutants for further studies: benzotriazole (80% interquan-tile of time-weighted average concentration: 250-4800 ng/L), carbamazepine (33-910 ng/L), diclofenac (78-1000 ng/L), carbendazim (21-900 ng/L), diazinon (2.1-53 ng/L), diuron (22-1100 ng/L), mecoprop (98-5300 ng/L), metolachlor (6-230 ng/L), and terbutryn (29-810 ng/L). These concentration estimates are assumed to be on the safe side for comparison with environmental quality standards (EQS). A majority of sewer overflow sites (13 of 20) show discharge concentrations above acute EQS for at least one micropollutant and thus would have to rely on dilution by receiving waters to not exceed any EQS. The intersite variability among sewer overflows exceed the within-site variability. Hence, future monitoring studies should cover more sewer overflow sites. No correlation could be found with event durations, specific storage volume or land use data, thus showing the complexity of micropollutant occurrence and indicating that other factors led to the observed high spatial variability. In conclusion, our results clearly show the potential relevance of micropollutants in sewer overflows and the need to assess site-specific measures.
机译：未经治疗的下水道溢出可以污染与微核性的接受水域。虽然排出的微渗透剂的浓度可以是生态毒理学相关的，但只有有限的数据可用于评估下水道溢流集水区之间的发生和空间差异。因此，我们提出了一种在20个组合的下水道溢出网站（每位站点的2-7个事件中使用被动采样器获得的创新类型的数据类型;总共有95个事件）。数据缩小了浓度范围的13个代表性的极性有机微渗透，并表明市政废水和雨水中的微孔可以是相关污染物的相关来源。我们鉴定进一步研究的指示微胶剂：苯并三唑（80％的时间加权平均浓度：250-4800 ng / L），carbamazepine（33-910 ng / L），双氯芬酸（78-1000 ng / L）， Carbendazim（21-900 ng / L），Diazinon（2.1-53 ng / L），Diuron（22-1100 ng / L），meCoprop（98-5300 ng / L），MetOlachlor（6-230 ng / L），和Terbutryn（29-810 ng / L）。假设这些浓度估计是安全方面，以便与环境质量标准（EQS）进行比较。大多数下水道溢流部位（13的10个）显示出至少一种微核性急性等压的放电浓度，因此必须通过接受水以不超过任何EQS来依赖稀释。下水道溢出的缺口性超过现场内变异性。因此，未来的监测研究应涵盖更多下水道溢出网站。没有任何相关性可以发现事件持续时间，特定存储量或土地利用数据，从而显示出微拷贝式发生的复杂性，并表明其他因素导致观察到的高空间变异性。总之，我们的结果清楚地表明微核性溢出剂在下水道溢出的潜在相关性以及评估特定现场措施的必要性。

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  • 来源
    《Environmental Science & Technology》 |2020年第11期|6584-6593|共10页
  • 作者

    Lena Mutzner; Christoph Bohren; Simon Mangold; Simon Bloem; Christoph Ort;

  • 作者单位

    Eawag Swiss Federal Institute of Aquatic Science and Technology. 8600 Duebendorf Switzerland Institute of Civil Environmental and Geotnatic Engineering ETH Zurich 8093 Zurich Switzerland;

    Eawag Swiss Federal Institute of Aquatic Science and Technology 8600 Duebendorf Switzerland Institute of Civil Environmental and Geotnatic Engineering ETH Zurich 8093 Zurich Switzerland;

    Eawag Swiss Federal Institute of Aquatic Science and Technology 8600 Duebendorf Switzerland;

    Eawag Swiss Federal Institute of Aquatic Science and Technology 8600 Duebendorf Switzerland;

    Eawag Swiss Federal Institute of Aquatic Science and Technology 8600 Duebendorf Switzerland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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