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首页> 外文期刊>Environmental Science & Technology >Clustering Chlorine Reactivity of Haloacetic Acid Precursors in Inland Lakes
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Clustering Chlorine Reactivity of Haloacetic Acid Precursors in Inland Lakes

机译：内陆湖泊卤代乙酸前体的聚氯反应性

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摘要

Dissolved organic matter (DOM) represents the major pool of organic precursors for harmful disinfection byproducts, such as haloacetic acids (HAAs), formed during drinking water chlorination, but much of it remains molecularly uncharacterized. Knowledge of model precursors is thus a prerequisite for understanding the more complex whole water DOM. The utility of HAA formation potential data from model DOM precursors, however, is limited due to the lack of comparability to water samples. In this study, the formation kinetics of dichloroacetic acid (DCAA) and trichloroacetic acid (TCAA), the two predominant HAA species, were delineated upon chlorination of seventeen model DOM precursors and sixty-eight inland lake water samples collected from the Upper Midwest region of the United States. Of particular interest was the finding that the DCAA and TCAA formation rate constants could be grouped into four statistically distinct clusters reflecting the core structural features of model DOM precursors (i.e., non-β-diketone aliphatics, β-diketone aliphatjcs, non-β-diketone phenolics, and β-diketone phenolics). A comparative approach built upon hierarchical cluster analysis was developed to gain further insight into the chlorine reactivity patterns of HAA precursors in inland lake waters as defined by the relative proximity to four model precursor clusters. This work highlights the potential for implementing an integrated kinetic-clustering approach to constrain the chlorine reactivity of DOM in source waters.
机译：溶解有机物（DOM）代表了用于饮用水消毒氯化过程中形成的有害消毒副产物（如卤乙酸（HAA））的主要有机前体库，但其中许多分子仍未表征。因此，了解模型前体是了解更复杂的整个水DOM的先决条件。但是，由于缺乏与水样品的可比性，来自模型DOM前体的HAA形成潜力数据的实用性受到限制。在这项研究中，对两种主要的HAA物种二氯乙酸（DCAA）和三氯乙酸（TCAA）的形成动力学进行了描述，方法是对17种模式DOM前体和从中西部上西部地区收集的68个内陆湖泊水样品进行氯化处理。美国。特别令人感兴趣的发现是，DCAA和TCAA形成速率常数可以分为四个统计学上不同的簇，这些簇反映了模型DOM前体的核心结构特征（即非β-二酮脂肪族，β-二酮脂，非β-二酮酚和β-二酮酚）。开发了一种基于层次聚类分析的比较方法，以进一步了解内陆湖泊水中HAA前体的氯反应模式，该模式由相对于四个模型前体簇的相对接近度来定义。这项工作强调了实施综合动力学聚类方法以限制源水中DOM的氯反应性的潜力。

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  • 来源
    《Environmental Science & Technology》 |2014年第1期|139-148|共10页
  • 作者

    Teng Zeng; William A. Arnold;

  • 作者单位

    Department of Civil Engineering, University of Minnesota, 500 Pillsbury Drive Southeast, Minneapolis, Minnesota 55455, United States,Department of Civil and Environmental Engineering, Stanford University, 473 Via Ortega, Stanford, CA 94305, United States;

    Department of Civil Engineering, University of Minnesota, 500 Pillsbury Drive Southeast, Minneapolis, Minnesota 55455, United States;

  • 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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