| Using non-invasive magnetic resonance imaging (MRI) to assess the reduction of Cr(VI) using a biofilm-palladium catalyst. | |
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MedLine Citation:
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PMID: 20506297 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Industrial waste streams may contain contaminants that are valuable like Pd(II) and/or toxic and mutagenic like Cr(VI). Using Serratia sp. biofilm the former was biomineralized to produce a supported nanocrystalline Pd(0) catalyst, and this biofilm-Pd heterogeneous catalyst was then used to reduce Cr(VI) to less dangerous Cr(III) at room temperature, with formate as the electron donor. Cr(VI)((aq)) is non-paramagnetic while Cr(III)((aq)) is paramagnetic, which enabled spatial mapping of Cr species concentrations within the reactor cell using non-invasive magnetic resonance (MR) imaging experiments. Spatial reactivity heterogeneities were thus examined. In batch reactions, these could be attributed primarily to heterogeneity of Pd(0) distribution and to the development of gas bubbles within the reactor. In continuous flow reactions, spatial reactivity heterogeneities resulted primarily from heterogeneity of Cr(VI) delivery. |
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Authors:
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D A Beauregard; P Yong; L E Macaskie; M L Johns |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Biotechnology and bioengineering Volume: 107 ISSN: 1097-0290 ISO Abbreviation: Biotechnol. Bioeng. Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-07-23 Completed Date: 2010-11-26 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7502021 Medline TA: Biotechnol Bioeng Country: United States |
Other Details:
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Languages: eng Pagination: 11-20 Citation Subset: IM |
Copyright Information:
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2010 Wiley Periodicals, Inc. |
Affiliation:
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Department of Chemical Engineering, University of Cambridge, UK. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Biofilms
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growth & development* Catalysis Chromium / chemistry*, isolation & purification, metabolism* Magnetic Resonance Imaging / methods* Oxidation-Reduction Palladium / chemistry* Serratia / cytology*, metabolism* Water Microbiology Water Purification / methods |
| Chemical | |
Reg. No./Substance:
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18540-29-9/chromium hexavalent ion; 7440-05-3/Palladium; 7440-47-3/Chromium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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