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首页> 外文期刊>Environmental Science & Technology >Concomitant Microbial Generation of Palladium Nanoparticles and Hydrogen To Immobilize Chromate
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Concomitant Microbial Generation of Palladium Nanoparticles and Hydrogen To Immobilize Chromate

机译：微生物产生钯纳米粒子和氢固定铬酸盐

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摘要

The catalytic properties of various metal nanoparticles have led to their use in environmental remediation. Our aim is to develop and apply an efficient bioremediation method based on in situ biosynthesis of bio-Pd nanoparticles and hydrogen. C. pasteurianum BC1 was used to reduce Pd(II) ions to form Pd nanoparticles (bio-Pd) that primarily precipitated on the cell wall and in the cytoplasm. C. pasteurianum BC1 cells, loaded with bio-Pd nanoparticle in the presence of glucose, were subsequently used to fermentatively produce hydrogen and to effectively catalyze the removal of soluble Cr(VI) via reductive transformation to insoluble Cr(III) species. Batch and aquifer microcosm experiments using C. pasteurianum BC1 cells loaded witti bio-Pd showed efficient reductive Cr(VI) removal, while in control experiments with killed or viable but Pd-tree bacterial cultures no reductive Cr(VI) removal was observed. Our results suggest a novel process where the in situ microbial production of hydrogen is directly coupled to the catalytic bio-Pd mediated reduction of chromate. This process offers significant advantages over the current groundwater treatment technologies that rely on introducing preformed catalytic nanoparticles into groundwater treatment zones and the costly addition of molecular hydrogen to above ground pump and treat systems.
机译：各种金属纳米颗粒的催化性能已导致其在环境修复中的应用。我们的目标是开发和应用一种基于生物钯纳米粒子和氢气原位生物合成的有效生物修复方法。巴氏梭菌BC1用于还原Pd（II）离子以形成Pd纳米颗粒（bio-Pd），其主要沉淀在细胞壁和细胞质中。葡萄糖中存在生物钯纳米粒子的巴氏杆菌BC1细胞随后用于发酵产生氢并通过还原转化为不溶性Cr（III）物种有效催化去除可溶性Cr（VI）。使用装满生物钯的巴氏杆菌BC1细胞的批次和含水层缩影实验显示了有效的还原性Cr（VI）去除，而在对照实验中，被杀死或可行但Pd树细菌培养物中未观察到还原性Cr（VI）去除。我们的结果表明了一种新颖的方法，其中原位产生的氢直接与催化的生物钯介导的铬酸盐还原反应耦合。与目前的地下水处理技术相比，该方法具有显着的优势，后者依赖于将预先形成的催化纳米颗粒引入地下水处理区，并向地上泵和处理系统中昂贵地添加分子氢。

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  • 来源
    《Environmental Science & Technology》 |2010年第19期|p.7635-7640|共6页
  • 作者

    DEV CHIDAMBARAM; TOM HENNEBEL; SAFIYH TACHAVI; JAN MAST; NICO BOON; WILLY VERSTRAETE; DANIEL VAN DER LELIE; IEFFREY P. FITTS;

  • 作者单位

    Chemical and Materials Engineering, University of Nevada Reno, Reno, Nevada 89557-0388 Belgium;

    rnLaboratory of Microbial Ecology and Technology (LabMET), Ghent University,Coupure Links 653, B-9000 Ghent;

    rnBiology Department, Brookhaven National Laboratory,Upton, New York 11973-5000;

    rnEM-unit of CODA-CERVA,Groeselenberg 99, B-1180 Brussels, Belgium;

    rnLaboratory of Microbial Ecology and Technology (LabMET), Ghent University,Coupure Links 653, B-9000 Ghent;

    rnLaboratory of Microbial Ecology and Technology (LabMET), Ghent University,Coupure Links 653, B-9000 Ghent;

    rnBiology Department, Brookhaven National Laboratory,Upton, New York 11973-5000;

    rnEnvironmental Sciences Department, Brookhaven National Laboratory, Upton, New York 11973-5000;

  • 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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