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Occurrence of THM and NDMA precursors in a watershed: Effect of seasons and anthropogenic pollution

机译：分水岭中THM和NDMA前体的存在：季节和人为污染的影响

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摘要

In pristine watersheds, natural organic matter is the main source of disinfection by-product (DBP) precursors. However, the presence of point or non-point pollution sources in watersheds may lead to increased levels of DBP precursors which in turn form DBPs in the drinking water treatment plant upon chlorina-tion or chloramination. In this study, water samples were collected from a lake used to obtain drinking water for Istanbul as well as its tributaries to investigate the presence of the precursors of two disinfection by-products, trihalomethanes (THM) and N-nitrosodimethylamine (NDMA). In addition, the effect of seasons and the possible relationships between these precursors and water quality parameters were evaluated. The concentrations of THM and NDMA precursors measured as total THM formation potential (TTHMFP) and NDMA formation potential (NDMAFP) ranged between 126 and 1523 u.g/L THM and <2 and 1648 ng/L NDMA, respectively. Such wide ranges imply that some of the tributaries are affected by anthropogenic pollution sources, which is also supported by high DOC, Cl- and NH_3 concentrations. No significant correlation was found between the water quality parameters and DBP formation potential, except for a weak correlation between NDMAFP and DOC concentrations. The effect of the sampling location was more pronounced than the seasonal variation due to anthropogenic pollution in some tributaries and no significant correlation was obtained between the seasons and water quality parameters.
机译：在原始流域中，天然有机物是消毒副产物（DBP）前体的主要来源。但是，流域中存在点或非点污染源可能会导致DBP前体水平升高，从而在饮用水处理厂中进行氯化或氯化后形成DBP。在这项研究中，从一个湖泊中收集了水样本，该湖泊用于为伊斯坦布尔及其支流获取饮用水，以研究两种消毒副产物三卤甲烷（THM）和N-亚硝基二甲胺（NDMA）的前体的存在。此外，还评估了季节的影响以及这些前体与水质参数之间的可能关系。以总THM形成电势（TTHMFP）和NDMA形成电势（NDMAFP）测得的THM和NDMA前驱物浓度分别在126和1523 u.g / L THM之间以及<2和1648 ng / L NDMA之间。如此宽泛的范围意味着某些支流受到人为污染源的影响，高DOC，Cl-和NH_3浓度也支持这一点。除了NDMAFP和DOC浓度之间的弱相关性外，在水质参数和DBP形成潜能之间没有发现显着的相关性。由于某些支流的人为污染，采样地点的影响比季节变化更为明显，并且季节与水质参数之间没有显着相关性。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第30期|p.86-91|共6页
  • 作者

    Egemen Aydin; Fatma Busra Yaman; Esra Ates Genceli; Emel Topuz; Esra Erdim; Melike Gurel; Murat Ipek; Elif Pehlivanoglu-Mantas;

  • 作者单位

    Department of Environmental Engineering, Istanbul Technical University, Maslak, Istanbul, 34469, Turkey;

    Department of Environmental Engineering, Yildiz Technical University, Davutpasa Mah. Davutpasa Caddesi, 34220 Esenler Istanbul, Turkey.;

    Department of Environmental Engineering, Istanbul Technical University, Maslak, Istanbul, 34469, Turkey;

    Department of Environmental Engineering, Istanbul Technical University, Maslak, Istanbul, 34469, Turkey;

    Department of Environmental Engineering, Istanbul Technical University, Maslak, Istanbul, 34469, Turkey;

    Department of Environmental Engineering, Istanbul Technical University, Maslak, Istanbul, 34469, Turkey;

    Department of Environmental Engineering, Istanbul Technical University, Maslak, Istanbul, 34469, Turkey;

    Department of Environmental Engineering, Istanbul Technical University, Maslak, Istanbul, 34469, Turkey;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    disinfection by-products; drinking water; LC-MS/MS; organic nitrogen; watershed;

    机译：消毒副产品;饮用水;LC-MS / MS;有机氮分水岭;

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