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首页> 外文期刊>Environmental Science & Technology >Effect of Bromide and Iodide Ions on the Formation and Speciation of Disinfection Byproducts during Chlorination
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Effect of Bromide and Iodide Ions on the Formation and Speciation of Disinfection Byproducts during Chlorination

机译：溴离子和碘离子对氯化过程中消毒副产物形成和形态的影响

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摘要

Two natural waters were fortified with various levels of bromide or iodide ions (0-30 mu M)and chlorinated in the laboratory to study the impact of bromide and iodide ions on the formation and speciation of disinfection byproducts.Trihalomethanes (THMs),haloacetic acids (HAAs),total organic halogen (TOX),and its halogen-specific fractions total organic chlorine (TOCl),bromine (TOBr),and iodine (TOl),were measured in this work.The molar yields of THMs and HAAs increased as the initial bromide concentration increased.No significant change in TOX concentration was found for varying bromide concentrations.However,TOX concentrations decreased substantially with increasing initial iodide concentrations.At higher levels of bromide,there was a decreasing level of unknown TOX and unknown TOCl but an increasing level of unknown TOBr.The extent of iodine substitution was much lower than that of bromine substitution when comparing identical initial concentrations because a substantial amount of iodide was oxidized to iodate by chlorine.The tendency toward iodate formation resulted in the unusual situation where higher chlorine doses actually caused reduced levels of iodinated organic byproducts.Quantitative assessment of the results of this study showed a good agreement with kinetic data in the literature.
机译：在实验室中对两种天然水分别添加了不同含量的溴离子或碘离子（0-30微米），并进行了氯化处理，研究了溴离子和碘离子对消毒副产物的形成和形态的影响。三卤甲烷，卤乙酸这项工作测量了总有机卤素（HAAs），总有机卤素（TOX）及其特定于卤素的馏分总有机氯（TOCl），溴（TOBr）和碘（TOl）.THMs和HAAs的摩尔产率随着初始溴化物浓度增加。在各种溴化物浓度下，TOX浓度均无显着变化。但是，随着初始碘化物浓度的增加，TOX浓度显着下降。在溴化物含量较高时，未知TOX和未知TOCl的含量降低，但是当比较相同的初始浓度时，碘取代的程度远低于溴取代的程度，因为大量的碘碘化物被氯氧化成碘酸盐。碘酸盐形成的趋势导致了一种不寻常的情况，即较高的氯剂量实际上导致碘化有机副产物的水平降低了。本研究结果的定量评估显示与文献中的动力学数据吻合良好。

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  • 来源
    《Environmental Science & Technology》 |2006年第9期|p.3050-3056|共7页
  • 作者

    GUANGHUI HUA; DAVID A.RECKHOW; JUNSUNG KIM;

  • 作者单位

    Department of Civil and Environmental Engineering, University of Massachusetts,Amherst,Massachusetts 01003;

    Department of Civil and Environmental Engineering, University of Massachusetts,Amherst,Massachusetts 01003;

    Department of Civil and Environmental Engineering, University of Massachusetts,Amherst,Massachusetts 01003;

  • 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 环境化学;
  • 关键词

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