Schippers, Axel; Hallmann, Regine; Wentzien, Susanne; Sand, Wolfgang:
Microbial diversity in uranium mine waste heaps.
1995
In: Applied and Environmental Microbiology (Appl.Environ.Microbiol.), Jg. 61 (1995), Heft 8, S. 2930 - 2935
Artikel/Aufsatz in Zeitschrift / Fach: Chemie
Titel:
Microbial diversity in uranium mine waste heaps.
Autor(in):
Schippers, Axel; Hallmann, Regine; Wentzien, Susanne; Sand, Wolfgang im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen
Erscheinungsjahr
1995
Erschienen in:
Applied and Environmental Microbiology (Appl.Environ.Microbiol.), Jg. 61 (1995), Heft 8, S. 2930 - 2935
ISSN

Abstract:

Two different uranium mine waste heaps near Ronneburg, Thuringia, Germany, which contain the remains of the activity of the former uranium-mining Soviet-East German company Wismut AG, were analyzed for the occurrence of lithotrophic and chemoorganotropic leach bacteria. A total of 162 ore samples were taken up to a depth of 5 m. Cell counts of ferrous iron-, sulfur-, sulfur compd.-, ammonia-, and nitrite-oxidizing bacteria were detd. quant. by the most-probable-no. technique. Sulfate-, nitrate-, ferric iron-, and manganese-reducing bacteria were also detected. In addn., the metabolic activity of sulfur- and iron-oxidizing bacteria was measured by microcalorimetry. Generally, all microorganisms mentioned above were detectable in the heaps. Aerobic and anaerobic microorganisms thrived up to a depth of 1.5 to 2 m. Up to 99% of Thiobacillus ferrooxidans cells, the dominant leaching bacteria, occurred to this depth. Their nos. correlated with the microbial activity measurements. Samples below 1.5 to 2 m exhibited reduced oxygen concns. and reduced cell counts for all microorganisms.