首页 馆藏资源 舆情信息 标准服务 科研活动 关于我们
现行 AWWA WQTC69356
到馆提醒
收藏跟踪
购买正版
Bromine Incorporation in Regulated and Emerging DBPs and the Relative Predominance of Mono-, Di-, and Trihalogenated DBPs 受管制和新兴DBP中的溴掺入以及单卤、二卤和三卤DBP的相对优势
发布日期: 2008-11-01
之前的研究表明,溴可以掺入三卤乙酸中 (TXAAs)与三卤甲烷(THMs)相似。同样,事件发生数据 其他三卤代消毒副产物(DBPs)(例如,卤代硝基甲烷[HNMs],卤代乙醛[HAs])已得到证实 与THMs的溴掺入量相似或更低。此外,溴的掺入 二卤代DBP的模式(例如,卤乙酸[HAAs]、卤乙腈[HANs], HNM、HAs)与汉族人相似或更高。其中一些差异可能是由于 对于空间位阻(即含溴的三卤代DBP),一些 DBP,和/或DBP相对于其最低报告水平处于较低水平。 然而,即使在某些DBP亚类中溴的掺入量较低的情况下 趋势是一致的(即,在大多数情况下,DBP子类之间的回归具有很高的相关性) 决定系数)。二卤代HAAs(DXAAs)的相对形成和 TXAAs与有机物的性质和/或使用的消毒剂有关。这 在不同的DBP类别中也观察到了这种现象。 此外,还测定了卤化的相对程度 与某些DBP物种的不稳定性有关。理解相对形成 不同的DBP物种可用于预测DBP的形成,但并非所有的DBP 有标准(例如卤代乙酰胺)可用于改善暴露评估。包括23个参考文献、表格和图表。
Previous research has shown that bromine incorporation into trihalogenated acetic acids (TXAAs) was similar to that of the trihalomethanes (THMs). Likewise, occurrence data for other trihalogenated disinfection byproducts (DBPs) (e.g., halonitromethanes [HNMs], haloacetaldehydes [HAs]) demonstrated similar or lower bromine incorporation as that of the THMs. Moreover, bromine incorporation patterns into dihalogenated DBPs (e.g., haloacetic acids [HAAs], haloacetonitriles [HANs], HNMs, HAs) were similar or higher for the HANs. Some of the differences may have been due to steric hindrance (i.e., trihalogenated DBPs containing bromine), relative instability of some DBPs, and/or the presence of DBPs at low levels relative to their minimum reporting levels. However, even when there was lower bromine incorporation into some DBP subclasses, the trend was consistent (i.e., in most cases, the regression between DBP subclasses had a high coefficient of determination). The relative formation of dihalogenated HAAs (DXAAs) and TXAAs has been related to the nature of the organic matter and/or the disinfectant(s) used. This was also observed for various DBP classes. In addition, the relative degree of halogenation was related to the instability of certain DBP species. Understanding the relative formation of different DBP species can be used in predicting the formation of DBPs for which not all standards are available (e.g., haloacetamides) and in improving exposure assessments. Includes 23 references, tables, figures.
分类信息
发布单位或类别: 美国-美国给水工程协会
关联关系
研制信息
相似标准/计划/法规