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首页> 外文期刊>Journal of Hazardous Materials >Effect of bromide on the transformation and genotoxicity of octyl-dimethyl-p-aminobenzoic acid during chlorination
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Effect of bromide on the transformation and genotoxicity of octyl-dimethyl-p-aminobenzoic acid during chlorination

机译：溴对氯化过程中辛基-二甲基-对氨基苯甲酸的转化和遗传毒性的影响

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摘要

Octyl-dimethyl-p-aminobenzoic acid (ODPABA), one of the most commonly used organic UV filters, can undergo considerable transformation in water when entering into the disinfection process. The impacts of bromide on degradation kinetics, formation and speciation of transformation products, regulated disinfection by-products (DBPs) as well as genotoxicity changes during ODPABA chlorination were investigated in this study. Results indicated that the reaction of ODPABA with chlorine followed pseudo-first-order and second-order kinetics. Adding bromide noticeably enhanced the degradation rate of ODPABA, but reduced the impact of chlorine dose. Four halogenated transformation products (Cl-ODPABA, Br-ODPABA, ClBr-ODPABA and Br-2-ODPABA) were detected by LC-MS/MS. Mono-halogenated products were stable during 24-h chlorination, while di-halogenated products constantly increased. The total yields of trihalomethanes (THMs) and haloacetic acids (HAAs) were both low, but predominated by bromine substitution at high levels of bromide. In addition, SOS/umu tests showed that genotoxicity was generated after ODPABA chlorination, which was increased at least 1.5 times in the presence of bromine. Whereas, no significant genotoxicity variation was observed following bromide concentration change. (C) 2016 Elsevier B.V. All rights reserved.
机译：辛基-二甲基-对氨基苯甲酸（ODPABA）是最常用的有机UV过滤剂之一，进入消毒过程后会在水中发生大量转化。在本研究中，研究了溴化物对ODPABA氯化过程中降解动力学，转化产物的形成和形态，受控消毒副产物（DBPs）以及遗传毒性变化的影响。结果表明，ODPABA与氯的反应遵循拟一级动力学和二级动力学。加入溴化物显着提高了ODPABA的降解率，但减少了氯剂量的影响。通过LC-MS / MS检测到四种卤化转化产物（Cl-ODPABA，Br-ODPABA，ClBr-ODPABA和Br-2-ODPABA）。单卤代产品在24小时氯化过程中保持稳定，而二卤代产品则不断增加。三卤代甲烷（THMs）和卤代乙酸（HAA）的总收率均很低，但主要以高溴含量的溴取代取代。此外，SOS / umu测试表明，ODPABA氯化后产生了遗传毒性，在溴的存在下，遗传毒性至少增加了1.5倍。然而，在溴化物浓度变化后未观察到明显的遗传毒性变化。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Journal of Hazardous Materials》 |2017年第ptab期|626-633|共8页
  • 作者

    Chai Qiwan; Zhang Shujuan; Wang Xiaomao; Yang Hongwei; Xie Yuefeng F.;

  • 作者单位

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

    China Natl Knowledge Infrastruct, Int Publishing Ctr, Beijing 100192, Peoples R China;

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China|Penn State Univ, Environm Engn Programs, Middletown, PA 17057 USA;

  • 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

    Octyl-dimethyl-p-aminobenzoic acid; Chlorination; Bromide; Transformation products; Genotoxicity;

    机译：辛基二甲基对氨基苯甲酸氯化溴化物转化产物遗传毒性;

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