ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Column experiments were carried out using contaminated geosubstrates and previouslyisolated Streptomyces strains from the former uranium mining area Ronneburg (Germany) to studytransfer processes of heavy metals including radionuclides.Preliminary tests with comparatively low heavy metal and radionuclide contaminated surfacematerial showed strongly elevated Mn concentrations up to 1060 #g/l after passage throughinoculated columns. In contrast, the eluates of non inoculated columns showed, after a “first flush”,low Mn concentrations around 30 #g/l. Poisoned control columns showed decreasingconcentrations after the “first flush” (maximum Mn release of 540 #g/l).Highest manganese release from the inoculated, non poisoned columns corresponded withstrongly decreasing redox potentials (+200 to -270 mV), which probably indicates microbiallycatalysed manganese release through reductive processes. One of the strains isolated from thecolumn material was identified as a potentially heavy metal resistant strain of Cupriavidusmetallidurans. It showed tolerance of up to 30 mM Mn (II), however no aerobic Mn (IV) reductionprocesses were indicated
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.20-21.311.pdf
Permalink