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首页> 外文期刊>Journal of environmental sciences >Characterization of halogenated DBPs and identification of new DBPs trihalomethanols in chlorine dioxide treated drinking water with multiple extractions
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Characterization of halogenated DBPs and identification of new DBPs trihalomethanols in chlorine dioxide treated drinking water with multiple extractions

机译：多种提取物卤化DBPS卤化DBPS的鉴定及二氧化碳处理水中新型DBPS三卤代甲醇的鉴定

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Chlorine dioxide (ClO2) is a widely used alternative disinfectant due to its high biocidal efficiency and low-level formation of trihalomethanes and haloacetic acids. A major portion of total organic halogen (TOX), a collective parameter for all halogenated DBPs, formed in ClO2-treated drinking water is still unknown. A commonly used pretreatment method for analyzing halogenated DBPs in drinking water is one-time liquid-liquid extraction (LLE), which may lead to a substantial loss of DBPs prior to analysis. In this study, characterization and identification of polar halogenated DBPs in a ClO2-treated drinking water sample were conducted by pretreating the sample with multiple extractions. Compared to one-time LLE, the combined four-time LLEs improved the recovery of TOX by 2.3 times. The developmental toxicity of the drinking water sample pretreated with the combined four-time LLEs was 1.67 times higher than that pretreated with one-time LLE. With the aid of ultra-performance liquid chromatography/electrospray ionization-triple quadrupole mass spectrometry, a new group of polar halogenated DBPs, trihalomethanols, were detected in the drinking water sample pretreated with multiple extractions; two of them, trichloromethanol and bromodichloromethanol, were identified with synthesized standard compounds. Moreover, these trihalomethanols were found to be the transformation products of trihalomethanes formed during ClO2 disinfection. The results indicate that multiple LLEs can significantly improve extraction efficiencies of polar halogenated DBPs and is a better pretreatment method for characterizing and identifying new polar halogenated DBPs in drinking water. (C) 2017 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
机译：二氧化氯（CLO2）是一种广泛使用的替代消毒剂，因为其高杀虫效率和三卤代甲烷和卤乙酸的低水平形成。总有机卤素（TOX）的主要部分，用于所有卤化DBP的集体参数，在CLO2处理的饮用水中形成仍然未知。用于分析饮用水中卤化DBP的常用预处理方法是一次性液 - 液萃取（LLE），其可能导致在分析之前的DBPS损失。在该研究中，通过用多种萃取预处理样品进行CLO2处理的饮用水样品中极性卤化dbps的表征和鉴定。与一次性LLE相比，组合的四次LLE将染额恢复增长2.3倍。用合并的四次小块预处理的饮用水样品的发育毒性比一次性lege预处理的比较高1.67倍。借助超级性能液相色谱/电喷雾电离 - 三重四极杆质谱法，在用多种提取物预处理的饮用水样品中检测到新的极性卤化DBPS，三卤代甲醇。其中两种，三氯甲醇和溴二氯甲醇用合成的标准化合物鉴定。此外，发现这些三卤代甲醇是在CLO2消毒期间形成的三卤代甲烷的转化产物。结果表明，多个小块可以显着提高极性卤化DBP的提取效率，是一种更好的预处理方法，用于表征和识别饮用水中的新极性卤化DBP。 （c）2017中国科学院生态环境科学研究中心。 elsevier b.v出版。

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