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MICROBIAL REDUCTION OF FE(III) IN MULTIPLE CLAY MINERALS BY SHEWANELLA PUTREFACIENS AND REACTIVITY OF BIOREDUCED CLAY MINERALS TOWARD TC(VII) IMMOBILIZATION

Bishop, Michael Edward
http://rave.ohiolink.edu/etdc/view?acc_num=miami1291059786

Abstract Details

2010, Master of Science, Miami University, Geology and Environmental Earth Science.
The reactivity of clay minerals toward technetium immobilization utilizing a suite of clay minerals ranging from smectite-illite including montmorillonite, nontronite, rectorite, mixed layered I-S (70:30), and illite, with chlorite (ripidolite), and palygorskite common in nature. The clay minerals were characterized utilizing multiple techniques. Fe-Oxides were removed prior to bioreduction using a modified dithionite-citrate-bicarbonate method. Fe (II) in the bioreduced clay minerals is used to reduce Tc(VII) to Tc (IV) in PIPES buffer. In the S:I series, the smectite end member was most effective in reducing Tc (VII) and the illite member the least effective, parallel to the extent and rate of Fe(III) bioreduction of these minerals. For all the clay minerals, the ratio of oxidized Fe(II) to reduced Tc(VII) was ~3.5±0.5. These kinetic results are important for our understanding of how various clay minerals may be used to immobilize heavy metal Tc at DOE contaminated sites.
Hailiang Dong, PhD (Advisor)
John Rakovan, PhD (Committee Member)
Mark Krekeler, PhD (Committee Member)
64 p.
Environmental Geology; Geology; Microbiology; Mineralogy
Smectite, montmorillonite, nontronite, mixed layered I-S, rectorite, illite, palygorskite, chlorite (ripidolite), Shewanella Putrifaciens CN-32, Fe(III) bioreduction, Fe(II) oxidation, Tc(VII) reduction, surface area, XRD, m&246; ssbauer, SEM, TEM

Recommended Citations

Citations

  • Bishop, M. E. (2010). MICROBIAL REDUCTION OF FE(III) IN MULTIPLE CLAY MINERALS BY SHEWANELLA PUTREFACIENS AND REACTIVITY OF BIOREDUCED CLAY MINERALS TOWARD TC(VII) IMMOBILIZATION [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1291059786

    APA Style (7th edition)

  • Bishop, Michael. MICROBIAL REDUCTION OF FE(III) IN MULTIPLE CLAY MINERALS BY SHEWANELLA PUTREFACIENS AND REACTIVITY OF BIOREDUCED CLAY MINERALS TOWARD TC(VII) IMMOBILIZATION. 2010. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1291059786.

    MLA Style (8th edition)

  • Bishop, Michael. "MICROBIAL REDUCTION OF FE(III) IN MULTIPLE CLAY MINERALS BY SHEWANELLA PUTREFACIENS AND REACTIVITY OF BIOREDUCED CLAY MINERALS TOWARD TC(VII) IMMOBILIZATION." Master's thesis, Miami University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1291059786

    Chicago Manual of Style (17th edition)

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This open access ETD is published by Miami University and OhioLINK.