Zinc immobilization and magnetite formation via ferric oxide reduction by Shewanella putrefaciens 200

Journal Article · Sat Jan 01 04:00:00 EST 2000 · Environmental Science and Technology

DOI:https://doi.org/10.1021/es990510x· OSTI ID:20014619

Cooper, D C; Picardal, F; Rivera, J; Talbot, C

Long-term batch experiments in an artificial groundwater medium indicated that microbial reduction of synthetic, high-surface-area goethite and lepidocrocite by Shewanella putrefaciens 200 can act to immobilize surface-associated zinc into a new mineral phase that is not soluble in 0.5 M HCl. While Zn was incorporated in siderite grains in experiments with goethite, additional Zn immobilization may result from incorporation into as yet unidentified biogenic minerals or into a more crystalline goethite. Experiments with an oxide mixture primarily composed of lepidocrocite resulted in the production of magnetite, biphasic immobilization of Zn, and an enhanced overall degree of Zn immobilization. When NO{sub 3}{sup {minus}} was present as an alternate electron acceptor, microbial production of Fe(II) was inhibited, and the degree of Zn immobilization was subsequently reduced. These data indicate that (i) biologically induced mineralization can play a key role in the cycling of trace elements in natural systems, (ii) the nature of the oxide surface plays an important role in biologically induced mineralization, and (iii) conditions associated with Fe(II) production are necessary for these processes to immobilize surface-bound Zn within these new mineral phases.

• Research Organization: Indiana Univ., Bloomington, IN (US)
• OSTI ID: 20014619
• Journal Information: Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 1 Vol. 34; ISSN ESTHAG; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
BACTERIA
BIODEGRADATION
GROUND WATER
IRON OXIDES
MAGNETITE
MINERALIZATION
REMEDIAL ACTION
ZINC