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首页> 外文期刊>Environmental Science & Technology >Four Groups of New Aromatic Halogenated Disinfection Byproducts: Effect of Bromide Concentration on Their Formation and Speciation in Chlorinated Drinking Water
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Four Groups of New Aromatic Halogenated Disinfection Byproducts: Effect of Bromide Concentration on Their Formation and Speciation in Chlorinated Drinking Water

机译：四类新型芳香卤代消毒副产物：溴化物浓度对其在氯化饮用水中的形成和形态的影响

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摘要

Bromide is naturally present in source waters worldwide. Chlorination of drinking water can generate a variety of chlorinated and brominated disinfection byproducts (DBPs). Although substantial efforts have been made to examine the effect of bromide concentration on the formation and speciation of halogenated DBPs, almost all previous studies have focused on trihalomethanes and haloacetic acids. Given that about 50% of total organic halogen formed in chlorination remains unknown, it is still unclear how bromide concentration affects the formation and speciation of the new/ unknown halogenated DBPs. In this study, chlorinated drinking water samples with different bromide concentrations were prepared, and a novel approach-precursor ion scan using ultra performance liquid chromatography/electrospray ionization-triple quadrupole mass spectrometry-was adopted for the detection and identification of polar halogenated DBPs in these water samples. With this approach, 11 new putative aromatic halogenated DBPs were identified, and they were classified into four groups: dihalo-4-hydroxybenzaldehydes, dihalo-4- hydroxybenzoic acids, dihalo-salicylic acids, and trihalo-phenols. A mechanism for the formation of the four groups of new aromatic halogenated DBPs was proposed. It was found that increasing the bromide concentration shifted the entire polar halogenated DBPs as well as the four groups of new DBPs from being less brominated to being more brominated; these new aromatic halogenated DBPs might be important intermediate DBPs formed in drinking water chlorination. Moreover, the speciation of the four groups of new DBPs was modeled: the speciation patterns of the four groups of new DBPs well matched those determined from the model equations, and the reactivity differences between HOBr and HOCl in reactions forming the four groups of new DBPs were larger than those in reactions forming trihalomethanes and haloacetic acids.
机译：溴化物自然存在于世界各地的水源中。饮用水的氯化可产生多种氯化和溴化消毒副产物（DBP）。尽管已做出大量努力来检查溴化物浓度对卤代DBP形成和形态的影响，但几乎所有以前的研究都集中在三卤代甲烷和卤代乙酸上。鉴于氯化过程中形成的总有机卤素中约有50％仍是未知的，因此仍不清楚溴化物的浓度如何影响新的/未知的卤化DBP的形成和形态。在这项研究中，制备了具有不同溴化物浓度的氯化饮用水样品，并采用了一种新的方法-使用超高效液相色谱/电喷雾电离-三重四极杆质谱法进行前体离子扫描，以检测和鉴定其中的极性卤代DBP。水样本。通过这种方法，鉴定了11种新的假定的芳族卤代DBP，并将它们分为四类：二卤-4-羟基苯甲醛，二卤-4-羟基苯甲酸，二卤水杨酸和三卤酚。提出了形成四组新的芳族卤代DBP的机理。发现增加溴化物浓度会使整个极性卤代DBP以及四组新的DBP从少溴化转变为多溴化。这些新的芳族卤代DBP可能是饮用水氯化中形成的重要的中间DBP。此外，对四组新DBP的形态进行了建模：四组新DBP的形态模式与根据模型方程确定的形态完全匹配，HOBr和HOCl在形成四组新DBP的反应中的反应性差异比形成三卤代甲烷和卤代乙酸的反应要大。

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  • 来源
    《Environmental Science & Technology》 |2013年第3期|1265-1273|共9页
  • 作者

    Yang Pan; Xiangru Zhang;

  • 作者单位

    Environmental Engineering Program, Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, China;

    Environmental Engineering Program, Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, China;

  • 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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