دورية أكاديمية
Mineral Defects Enhance Bioavailability of Goethite toward Microbial Fe(III) Reduction.
| العنوان: | Mineral Defects Enhance Bioavailability of Goethite toward Microbial Fe(III) Reduction. |
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| المؤلفون: | Notini L; Department of Civil and Environmental Engineering , University of Iowa , Iowa City , Iowa 52242 , United States., Byrne JM; Geomicrobiology Group, Centre for Applied Geosciences (ZAG) , University of Tübingen , Sigwartstrasse 10 , D-72076 , Tübingen , Germany., Tomaszewski EJ; Geomicrobiology Group, Centre for Applied Geosciences (ZAG) , University of Tübingen , Sigwartstrasse 10 , D-72076 , Tübingen , Germany., Latta DE; Department of Civil and Environmental Engineering , University of Iowa , Iowa City , Iowa 52242 , United States., Zhou Z; Department of Civil and Environmental Engineering , University of Iowa , Iowa City , Iowa 52242 , United States., Scherer MM; Department of Civil and Environmental Engineering , University of Iowa , Iowa City , Iowa 52242 , United States., Kappler A; Geomicrobiology Group, Centre for Applied Geosciences (ZAG) , University of Tübingen , Sigwartstrasse 10 , D-72076 , Tübingen , Germany. |
| المصدر: | Environmental science & technology [Environ Sci Technol] 2019 Aug 06; Vol. 53 (15), pp. 8883-8891. Date of Electronic Publication: 2019 Jul 18. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: American Chemical Society Country of Publication: United States NLM ID: 0213155 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1520-5851 (Electronic) Linking ISSN: 0013936X NLM ISO Abbreviation: Environ Sci Technol Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: Washington DC : American Chemical Society Original Publication: Easton, Pa. : American Chemical Society, c1967- |
| مواضيع طبية MeSH: | Ferric Compounds* , Iron Compounds*, Biological Availability ; Minerals ; Oxidation-Reduction |
| مستخلص: | Surface defects have been shown to facilitate electron transfer between Fe(II) and goethite (α-FeOOH) in abiotic systems. It is unclear, however, whether defects also facilitate microbial goethite reduction in anoxic environments where electron transfer between cells and Fe(III) minerals is the limiting factor. Here, we used stable Fe isotopes to differentiate microbial reduction of goethite synthesized by hydrolysis from reduction of goethite that was further hydrothermally treated to remove surface defects. The goethites were reduced by Geobacter sulfurreducens in the presence of an external electron shuttle, and we used ICP-MS to distinguish Fe(II) produced from the reduction of the two types of goethite. When reduced separately, goethite with more defects has an initial rate of Fe(III) reduction about 2-fold higher than goethite containing fewer defects. However, when reduced together, the initial rate of reduction is 6-fold higher for goethite with more defects. Our results suggest that there is a suppression of the reduction of goethite with fewer defects in favor of the reduction of minerals with more defects. In the environment, minerals are likely to contain defects and our data demonstrates that even small changes at the surface of iron minerals may change their bioavailability and determine which minerals will be reduced. |
| المشرفين على المادة: | 0 (Ferric Compounds) 0 (Iron Compounds) 0 (Minerals) 1310-14-1 (goethite) |
| تواريخ الأحداث: | Date Created: 20190710 Date Completed: 20191128 Latest Revision: 20191128 |
| رمز التحديث: | 20231215 |
| DOI: | 10.1021/acs.est.9b03208 |
| PMID: | 31284712 |
| قاعدة البيانات: | MEDLINE |
Find this issue from the American Chemical Society | تدمد: | 1520-5851 |
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| DOI: | 10.1021/acs.est.9b03208 |