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首页> 外文期刊>Environmental Science & Technology >Iron and Electron Shuttle Mediated (Bio)degradation of 2,4-Dinitroanisole (DNAN)
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Iron and Electron Shuttle Mediated (Bio)degradation of 2,4-Dinitroanisole (DNAN)

机译：铁和电子穿梭介导的2,4-二硝基苯甲醚（DNAN）降解（生物）

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The Department of Defense has developed explosives with the insensitive munition 2,4-dinitroanisole (DNAN), to prevent accidental detonations during training and operations. Understanding the fate and transport of DNAN is necessary to assess the risk it may represent to groundwater once the new ordnance is routinely produced and used. Experiments with ferrous iron or anthrahydroquinone-2,6- disulfonate (AH_2QDS) were conducted from pH 6.0 to 9.0 with initial DNAN concentrations of 100 μM. DNAN was degraded by 1.2 mM Fe(Ⅱ) at pH 7, 8, and 9, and rates increased with increasing pH. Greater than 90% of the initial 100 μM DNAN was reduced within 10 min at pH 9, and all DNAN was reduced within 1 h. AH_2QPS reduced DNAN at all pH values tested. Cells of Geobacter metallireducens were added in the presence and absence of Fe(Ⅲ) and/or anthraquinone-2,6-disulfonate (AQDS), and DNAN was also reduced in all cell suspensions. Cells reduced the compound directly, but both AQDS and Fe(Ⅲ) increased the reaction rate, via the production of AH_2QDS and/or Fe(Ⅱ). DNAN was degraded via two intermediates: 2-methoxy-5-nitroaniline and 4-methoxy-3-nitroaniline, to the amine product 2,4-diaminoanisole. These data suggest that an effective strategy can be developed for DNAN attenuation based on combined biological-abiotic reactions mediated by Fe(Ⅲ)-reducing microorganisms.
机译：国防部已开发了具有不敏感弹药2,4-二硝基苯甲醚（DNAN）的炸药，以防止在训练和操作过程中意外爆炸。一旦常规生产和使用新兵器，必须了解DNAN的命运和运输，以评估其可能对地下水造成的风险。用pH值为6.0至9.0的亚铁或2,6-二氢蒽醌二磺酸盐（AH_2QDS）进行了实验，初始DNAN浓度为100μM。 DNAN在pH 7、8和9时被1.2 mM Fe（Ⅱ）降解，并且速率随pH的增加而增加。在pH 9下10分钟内，超过100％的初始DNA N的90％以上被还原，所有DNAN在1小时内被还原。在所有测试的pH值下，AH_2QPS均可降低DNAN。在存在和不存在Fe（Ⅲ）和/或蒽醌-2,6-二磺酸盐（AQDS）的情况下添加金属还原土杆菌的细胞，并且所有细胞悬液中的DNAN都减少。细胞可直接还原该化合物，但AQDS和Fe（Ⅲ）均可通过生成AH_2QDS和/或Fe（Ⅱ）来提高反应速率。 DNAN通过两个中间体：2-甲氧基-5-硝基苯胺和4-甲氧基-3-硝基苯胺降解为胺产物2,4-二氨基苯甲醚。这些数据表明，基于减少Fe（Ⅲ）的微生物介导的生物-非生物反应的组合，可以为DNAN的减毒制定有效的策略。

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  • 来源
    《Environmental Science & Technology》 |2017年第18期|10729-10735|共7页
  • 作者

    Jolanta B. Niedzwiecka; Scott R. Drew; Mark A. Schlautman; Kayleigh A. Millerick; Erin Grubbs; Nishanth Tharayil; Kevin T. Finneran;

  • 作者单位

    Environmental Engineering and Earth Sdences, Clemson University, 168 Rich Laboratory, Anderson, South Carolina 29625, United States;

    Geosyntec Consultants, Ewing, New Jersey 08628, United States;

    Environmental Engineering and Earth Sdences, Clemson University, 168 Rich Laboratory, Anderson, South Carolina 29625, United States;

    Environmental Engineering and Earth Sdences, Clemson University, 168 Rich Laboratory, Anderson, South Carolina 29625, United States,Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States;

    Environmental Engineering and Earth Sdences, Clemson University, 168 Rich Laboratory, Anderson, South Carolina 29625, United States;

    School of Agriculture, Forestry, and Environmental Sciences, Clemson University, 218 Biosystems Research Complex, Clemson, South Carolina 29634, United States;

    Environmental Engineering and Earth Sdences, Clemson University, 168 Rich Laboratory, Anderson, South Carolina 29625, 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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