Production of biogenic Mn oxides by Leptothrix discophora SS-1 in a chemically defined growth medium and evaluation of their Pb adsorption characteristics
Article Abstract:
The lead (Pb) adsorption isotherms of biogenic Mn oxides produced by Leptothrix discophora SS-1 in a chemically defined growth medium have been determined. The isotherms were compared with those of cells and exopolymer alone as well as abiotic Mn oxides. Results reveal Pb adsorption to cells and exopolymer with biogenic Mn oxides was 2 orders of magnitude greater than Pb adsorption to cells and exopolymer alone at 25 degrees C and at pH 6.0. The Pb adsorption to the biogenic Mn oxide was two to five times greater than Pb adsorption to a chemically precipitated abiotic Mn oxide.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1999
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Isolation and characterization of novel iron-oxidizing bacteria that grow at circumneutral pH
Article Abstract:
A research was conducted to study a gradient method for cultivating iron-oxidizing prokaryotes and examine two new bacteria isolated from a groundwater-fed iron seep that seemed to grow lithotropically on ferrous iron. The growth bands from several growth tubes per isolate were harvested and washed to determine whether the isolates could carry out the reduction of the iron oxides. Results suggested that microbes may provide a biological explanation for the banded iron formations in the Archaeon and early Proterozoic eras.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1997
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