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首页> 外文期刊>RSC Advances >Reduction of [Co(III)-EDTA](-) complex by a novel process using phototrophic granules: a step towards sustainable bioremediation
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Reduction of [Co(III)-EDTA](-) complex by a novel process using phototrophic granules: a step towards sustainable bioremediation

机译：通过使用光养颗粒的新方法减少[CO（III）-EDTA]（ - ）复合物：迈向可持续生物修复的步骤

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摘要

Microbial granules are more effective than monoculture bacteria in the bioremediation process of environmental contaminants. Among various types of microbial granules phototrophic granules are relatively advantageous in bioremediation than heterotrophic granules since they are self-sustaining. [Co(III)(-)EDTA](-) generated during nuclear waste management is difficult to remove from the radioactive waste due to its high solubility and stability. In this study, phototrophic granules generated from a freshwater source were used for the reduction of [Co(III)-EDTA](-) under anoxic conditions. The results of the study showed that the phototrophic granules efficiently reduced the highly soluble [Co(III)-EDTA](-) to a lesser soluble form, [Co(II)-EDTA](2-) up to a concentration of 20 mM. The rate of [Co(III)-EDTA](-) reduction was found to be relatively high when the process was performed with acclimatized phototrophic granules when compared to non-acclimatized granules. Specific studies using antibiotics to kill the heterotrophic bacterial population of the phototrophic granules showed that [Co(III)-EDTA](-) reduction was carried out predominantly by the phototrophs. Investigations were also carried out to test the robustness of phototrophic granules to perform [Co(III)-EDTA](-) reduction after gamma irradiation. The phototrophic granules showed substantial radio-tolerance and could reduce [Co(III)-EDTA](-) without any significant loss in the activity, when irradiated up to 2 kGy. The study suggests that phototrophic granules have potential application in bioremediation of moderate level nuclear waste.
机译：微生物颗粒比环境污染物的生物化过程中的单一胚细胞更有效。在各种类型的微生物颗粒中，光养颗粒在生物化中比异养颗粒相对有利，因为它们是自我维持的。核废料管理期间产生的CO（III）（ - ）EDTA]（ - ）由于其高溶解性和稳定性而难以从放射性废物中移除。在该研究中，从淡水源产生的光养颗粒用于减少缺氧条件下的[CO（III）-EDTA]（ - ）。该研究的结果表明，光营养颗粒有效地将高可溶性的溶液（CO（III）-EDTA]（ - ）与较小的可溶性形式还原，[CO（II）-EDTA]（2-）浓度为20毫米。当与非适应的颗粒相比，在用适应的光养颗粒进行过程时，发现[CO（III）-EDTA]（ - ）还原的速率相对较高。使用抗生素杀死光营养颗粒的异养细菌群的具体研究表明，通过光营养术主要进行[CO（III）-EDTA]（ - ）减少。还进行了研究以测试γ辐射后进行光养颗粒的稳健性，以在γ辐射后进行[CO（III）-EDTA]（ - ）降低。光营养颗粒显示出基本的无线电耐受性，并且可以减少[CO（III）-EDTA]（ - ），而在辐照至2kGy时，无需任何显着损失。该研究表明，光营养颗粒具有中等核废料的生物修复潜在的应用。

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  • 来源
    《RSC Advances》 |2016年第49期|共7页
  • 作者

    Paraneeiswaran Arunachalam; Shukla Sudhir K.; Kumar Rajesh; Rao T. Subba;

  • 作者单位

    Pondicherry Univ Dept Biotechnol Pondicherry 605014 India;

    BARC Water &

    Steam Chem Div Kalpakkam 603102 Tamil Nadu India;

    BARC Water &

    Steam Chem Div Kalpakkam 603102 Tamil Nadu India;

    BARC Water &

    Steam Chem Div Kalpakkam 603102 Tamil Nadu India;

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  • 正文语种 eng
  • 中图分类 化学;
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