• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Formation of Bromate and Halogenated Disinfection Byproducts during Chlorination of Bromide-Containing Waters in the Presence of Dissolved Organic Matter and CuO
【24h】

Formation of Bromate and Halogenated Disinfection Byproducts during Chlorination of Bromide-Containing Waters in the Presence of Dissolved Organic Matter and CuO

机译：溶解有机物和CuO存在下含溴水氯化过程中溴酸盐和卤代消毒副产物的形成

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Previous studies showed that significant bromate (BrO_3~-) can be formed via the CuO-catalyzed disproportiona- tion of hypobromous acid (HOBr) pathway. In this study, the influence of CuO on the formation of BrO_3~- and halogenated disinfection byproducts (DBPs) (e.g., trihalomethanes, THMs and haloacetic acids,'HAAs) during chlorination of six dissolved organic matter (DOM) isolates was investigated. Only in the presence of slow reacting DOM (from treated Colorado River water, i.e., CRW-BF-HPO), significant BrO_3~- formation is observed, which competes with bromination of DOM (i.e., THM and HAA formation). Reactions between HOBr and 12 model compounds in the presence of CuO indicates that CuO-catalyzed HOBr disproportionation is completely inhibited by fast reacting phenols, while it predominates in the presence of practically unreactive compounds (acetone, butanol, propionic, and butyric acids). In the presence of slow reacting di- and tricarboxylic acids (oxalic, malonic, succinic, and citric acids), BrO_3~- formation varies, depending on its competition with bromoform and dibromoacetic acid formation (i.e., bromination pathway). The latter pathway can be enhanced by CuO due to the activation of HOBr. Therefore, increasing CuO dose (0-0.2 g L~(-1)) in a reaction system containing chlorine, bromide, and CRW-BF-HPO enhances the formation of BrO_3~-, total THMs and HAAs. Factors including pH and initial reactant concentrations influence the DBP formation. These novel findings have implications for elevated DBP formation during transportation of chlorinated waters in copper-containing distribution systems.
机译：先前的研究表明，可通过CuO催化的次溴酸（HOBr）途径歧化形成大量的溴酸盐（BrO_3〜-）。在这项研究中，研究了六种溶解有机物（DOM）分离物氯化过程中，CuO对BrO_3和卤代消毒副产物（DBP）（例如三卤甲烷，THM和卤代乙酸，'HAAs）形成的影响。仅在存在缓慢反应的DOM（来自处理过的科罗拉多河水，即CRW-BF-HPO）的情况下，才观察到显着的BrO 3-形成，其与DOM的溴化竞争（即THM和HAA形成）。在CuO存在下HOBr与12种模型化合物之间的反应表明，CuO催化的HOBr歧化被快速反应的苯酚完全抑制，而在几乎没有反应性的化合物（丙酮，丁醇，丙酸和丁酸）存在下则占主导地位。在存在缓慢反应的二羧酸和三羧酸（草酸，丙二酸，琥珀酸和柠檬酸）的情况下，BrO 3-的形成会有所不同，具体取决于其与溴仿和二溴乙酸形成的竞争（即溴化途径）。由于HOBr的活化，CuO可以增强后一种途径。因此，在含氯，溴化物和CRW-BF-HPO的反应体系中增加CuO剂量（0-0.2 g L〜（-1））会增加BrO_3〜-，总THM和HAAs的形成。包括pH和初始反应物浓度在内的因素都会影响DBP的形成。这些新发现对含铜配电系统中氯化水的运输过程中DBP形成升高产生了影响。

著录项

  • 来源
    《Environmental Science & Technology》 |2016年第1期|135-144|共10页
  • 作者

    Chao Liu; Jean-Philippe Croue;

  • 作者单位

    Water Desalination and Reuse Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia,Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, South Carolina 29625, United States;

    Water Desalination and Reuse Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia,Curtin Water Quality Research Center, Department of Chemistry, Curtin University, Perth, WA-6845, Australia;

  • 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

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号