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首页> 外文期刊>Environmental Science & Technology >Enhanced Inactivation of Escherichia coli and MS2 Coliphage by Cupric Ion in the Presence of Hydroxylamine: Dual Microbicidal Effects
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Enhanced Inactivation of Escherichia coli and MS2 Coliphage by Cupric Ion in the Presence of Hydroxylamine: Dual Microbicidal Effects

机译：羟胺存在下铜离子增强的大肠杆菌和MS2 Coliphage灭活：双重杀微生物作用

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摘要

The inactivation of Escherichia coli and MS2 coliphage by Cu(Ⅱ) is found to be significantly enhanced in the presence of hydroxylamine (HA). The addition of a small amount of HA (i.e., 5-20 μM) increased the inactivation efficacies of E coli and MS2 coliphage by 5- to 100-fold, depending on the conditions. Dual effects were anticipated to enhance the biocidal activity of Cu(Ⅱ) by the addition of HA, viz. (ⅰ) the accelerated reduction of Cu(Ⅱ) into Cu(Ⅰ) (a stronger biocide) and (ⅱ) the production of reactive oxidants from the reaction of Cu(Ⅰ) with dissolved oxygen (evidenced by the oxidative transformation of methanol into formaldehyde). Deaeration enhanced the inactivation of E. coli but slightly decreased the inactivation efficacy of MS2 coliphage. The addition of 10 μM hydrogen peroxide (H_2O_2) greatly enhanced the MS2 inactivation, whereas the same concentration of H_2O_2 did not significantly affect the inactivation efficacy of E. coli Observations collectively indicate that different biocidal actions lead to the inactivation of E. coli and MS2 coliphage. The toxicity of Cu(Ⅰ) is dominantly responsible for the E. coli inactivation. However, for the MS2 coliphage inactivation, the oxidative damage induced by reactive oxidants is as important as the effect of Cu(Ⅰ).
机译：发现在羟胺（HA）存在下，Cu（Ⅱ）对大肠杆菌和MS2噬菌体的灭活作用明显增强。视情况而定，添加少量的HA（即5-20μM）可使大肠杆菌和MS2噬菌体的灭活效率提高5至100倍。通过添加HA，有望达到双重作用以增强Cu（Ⅱ）的杀生物活性。 （ⅰ）加速将Cu（Ⅱ）还原成Cu（Ⅰ）（一种更强的杀菌剂）和（ⅱ）Cu（Ⅰ）与溶解氧的反应产生反应性氧化剂（通过甲醇氧化转化为甲醇证明）甲醛）。脱气增强了大肠杆菌的灭活作用，但稍微降低了MS2噬菌体的灭活功效。加入10μM过氧化氢（H_2O_2）大大增强了MS2的灭活作用，而相同浓度的H_2O_2并没有显着影响大肠杆菌的灭活效果。观察结果共同表明，不同的杀生物作用导致大肠杆菌和MS2灭活。噬菌体。 Cu（Ⅰ）的毒性主要导致大肠杆菌的失活。然而，对于MS2噬菌体灭活，反应性氧化剂引起的氧化损伤与Cu（Ⅰ）的作用一样重要。

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  • 来源
    《Environmental Science & Technology》 |2015年第24期|14416-14423|共8页
  • 作者

    Hyung-Eun Kim; Thuy T. M. Nguyen; Hongshin Lee; Changha Lee;

  • 作者单位

    School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), SO UNIST-gil, Ulju-gun, Ulsan, 689-798, Republic of Korea;

    Power Engineering Consulting Joint Stock Company 2 (PECC2), 32 Ngo Thoi Nhiem str., Ward 7, District 3, Ho Chi Minh City, Vietnam;

    School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), SO UNIST-gil, Ulju-gun, Ulsan, 689-798, Republic of Korea;

    School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), SO UNIST-gil, Ulju-gun, Ulsan, 689-798, Republic of Korea;

  • 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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