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首页> 外文期刊>Environmental Science & Technology >Biogenic Palladium Enhances Diatrizoate Removal from Hospital Wastewater in a Microbial Electrolysis Cell
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Biogenic Palladium Enhances Diatrizoate Removal from Hospital Wastewater in a Microbial Electrolysis Cell

机译：生物源钯增强微生物电解池中医院废水中的重氮酸盐去除

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摘要

To decrease the load of pharmaceuticals to the environment, decentralized wastewater treatment has been proposed for important point-sources such as hospitals. In this study, a microbial electrolysis cell (MEC) was used for the dehalogenation of the iodinated X-ray contrast medium diatrizoate. The presence of biogenic palladium nanoparticles (bio-Pd) in the cathode significantly enhanced diatrizoate removal by direct electrochemical reduction and by reductive catalysis using the H2 gas produced at the cathode of the MEC. Complete deiodination of 3.3 fxM (2 mg L"1) diatrizoate from a synthetic medium was achieved after 24 h of recirculation at an applied voltage of -0.4 V. An equimolar amount of the deiodinated metabolite 3,5-diacetamidobenzoate (DAB) was detected. Higher cell voltages increased the dehalogenation rates, resulting in a complete removal after 2 h at -0.8 V. At this cell voltage, the MEC was also able to remove 85% of diatrizoate from hospital effluent containing 0.5 JiM (292 fig L ]), after 24 h of recirculation. Complete removal was obtained when the effluent was continuously fed at a volumetric loading rate of 204 mg diatrizoate m~3 total cathodic compartment (TCC) day"l to the MEC with a hydraulic retention time of 8 h. At -0.8 V, the MEC system could also eliminate 54% of diatrizoate from spiked urine during a 24 h recirculation experiment. The final product DAB was demonstrated to be removable by nitrifying biomass, which suggests that the combination of a MEC and bio-Pd in its cathode offers potential to dehalogenate pharmaceuticals, and to significantly lower the environmental burden of hospital waste streams.
机译：为了减少药品对环境的负荷，有人建议对重要的点源（如医院）进行分散废水处理。在这项研究中，微生物电解池（MEC）用于碘化X射线造影剂重氮酸盐的脱卤作用。通过直接电化学还原和使用在MEC阴极产生的H2气体进行还原催化，阴极中生物钯纳米颗粒（bio-Pd）的存在显着增强了泛影酸盐的去除。在-0.4 V的施加电压下再循环24小时后，从合成介质中完全清除了3.3 fxM（2 mg L“ 1）的泛氮碘化物。检测到等摩尔量的脱碘代谢产物3,5-二乙酰氨基苯甲酸酯（DAB） 。较高的电池电压会提高脱卤速率，从而在-0.8 V下2小时后将其完全去除。在此电池电压下，MEC还能够从含0.5 JiM的医院废水中去除85％的泛影酸盐（292图L]）。 ，经过24小时的再循环，当废水以204毫克泛氮酸盐m〜3总阴极室（TCC）第1天的体积装载速率连续进水到MEC上，水力停留时间为8 h时，可以完全去除废水。在-0.8 V时，MEC系统还可以在24小时的再循环实验中从加标的尿液中消除54％的泛影酸盐。最终产品DAB被证明可以通过生物质硝化而去除，这表明MEC和阴极上的bio-Pd的结合提供了使药物脱卤的潜力，并显着降低了医院废物流的环境负担。

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  • 来源
    《Environmental Science & Technology》 |2011年第13期|p.5737-5745|共9页
  • 作者

    Bart De Gusseme; Tom Hennebel; Lynn Vanhaecke; Maarten Soetaert; Joachim Desloover; Klaas Wille; Kim Verbeken; Willy Verstraete; Nico Boon;

  • 作者单位

    Laboratory of Microbial Ecology and Technology (LabMET), Faculty of Bioscience Engineering, Ghent University,Coupure Links 653, B-9000 Gent, Belgium;

    Laboratory of Microbial Ecology and Technology (LabMET), Faculty of Bioscience Engineering, Ghent University,Coupure Links 653, B-9000 Gent, Belgium;

    Laboratory of Chemical Analysis, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium;

    Laboratory of Microbial Ecology and Technology (LabMET), Faculty of Bioscience Engineering, Ghent University,Coupure Links 653, B-9000 Gent, Belgium;

    Laboratory of Microbial Ecology and Technology (LabMET), Faculty of Bioscience Engineering, Ghent University,Coupure Links 653, B-9000 Gent, Belgium;

    Laboratory of Chemical Analysis, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium;

    Department of Materials Science and Engineering, Faculty of Engineering, Ghent University, Technologiepark 903,B-9052 Gent, Belgium;

    Laboratory of Microbial Ecology and Technology (LabMET), Faculty of Bioscience Engineering, Ghent University,Coupure Links 653, B-9000 Gent, Belgium;

    Laboratory of Microbial Ecology and Technology (LabMET), Faculty of Bioscience Engineering, Ghent University,Coupure Links 653, B-9000 Gent, Belgium;

  • 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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