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首页> 外文期刊>Environmental Science & Technology >Intracellular Organic Matter from Cyanobacteria as a Precursor for Carbonaceous and Nitrogenous Disinfection Byproducts
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Intracellular Organic Matter from Cyanobacteria as a Precursor for Carbonaceous and Nitrogenous Disinfection Byproducts

机译：蓝藻细胞内有机物作为碳和氮消毒副产物的前体

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The formation of total organic halogen (TOX), carbonaceous disinfection byproducts (DBPs) (trihalomethanes (THMs) and haloacetic acids (HAAs)), and nitrogenous DBPs (trichloronitromethane (TCNM) or chloropicrin, haloacetoni- triles (HANs), and nitrosamines) was examined during the chlorination or chloramination of intracellular organic matter (IOM) extracted from Microcystis aeruginosa, Oscillatoria sp. (OSC), and Lyngbya sp. (LYN). The percentage of unknown TOX (22-38%) during chlorination indicated that the majority of DBPs were identified among THMs, HAAs, TCNM, and HANs. Bromide was readily incorporated into DBPs with speciation shifting slightly from dihalogenated species to trihalogenated species. During formation potential testing with chloramines, nitrosamine yields from IOM were measured for N-nitrosodimethylamine (NDMA, 10-52 ng/mg_c), N-nitrosopyrrolidine (NPYR, 14 ng/mg_c), N-nitrosopiperidine (NPIP, 3.7-5.5 ng/mg_c), and N-nitrosomethylethylamine (NMEA, 2.1-2.6 ng/mg_c). When IOM was added to a natural water matrix, the nitrosamine yields were not realized likely due to competition from natural organic matter. Ozonation increased NDMA and NMEA formation and reduced NPYR and NPIP formation during subsequent chloramination. In addition, ozone oxidation of IOM formed detectable concentrations of aldehydes, which may contribute to DBP formation. Finally, bioluminescence-based test results showed that >99% of the IOM extracted from OSC and LYN was biodegradable. Therefore, a biological treatment process could minimize this source of DBP precursor material during drinking water treatment.
机译：形成总有机卤素（TOX），含碳消毒副产物（DBP）（三卤甲烷（THM）和卤乙酸（HAAs））和含氮DBP（三氯硝基甲烷（TCNM）或氯仿，卤代乙腈（HANs）和亚硝胺）在从绿藻微囊藻（Oscillatoria sp。）提取的细胞内有机物（IOM）的氯化或氯化过程中进行了检查。 （OSC）和Lyngbya sp。 （LYN）。氯化过程中未知TOX的百分比（22-38％）表明，大多数DBP在THM，HAA，TCNM和HAN中被鉴定出。溴化物很容易掺入DBP中，其形态从二卤代物种向三卤代物种稍有变化。在用氯胺进行地势测试期间，测量了IOM的亚硝胺产量，包括N-亚硝基二甲胺（NDMA，10-52 ng / mg_c），N-亚硝基吡咯烷（NPYR，14 ng / mg_c），N-亚硝基哌啶（NPIP，3.7-5.5 ng） / mg_c）和N-亚硝基甲基乙胺（NMEA，2.1-2.6 ng / mg_c）。当将IOM添加到天然水基质中时，由于与天然有机物的竞争，亚硝胺的收率可能无法实现。在随后的氯化过程中，臭氧化增加了NDMA和NMEA的形成，并减少了NPYR和NPIP的形成。此外，IOM的臭氧氧化形成可检测浓度的醛，这可能有助于DBP的形成。最后，基于生物发光的测试结果表明，从OSC和LYN提取的IOM中，> 99％是可生物降解的。因此，在饮用水处理过程中，生物处理工艺可以最大程度地减少这种DBP前体物质的来源。

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  • 来源
    《Environmental Science & Technology》 |2013年第12期|6332-6340|共9页
  • 作者

    Eric C. Wert; Fernando L. Rosario-Ortiz;

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    Southern Nevada Water Authority (SNWA), P.O. Box 99954, Las Vegas, Nevada 89193-9954, United States,Department of Civil, Environmental and Architectural Engineering, University of Colorado, Boulder, Colorado 80309, United States;

    Department of Civil, Environmental and Architectural Engineering, University of Colorado, Boulder, Colorado 80309, United States;

  • 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);
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