TY - JOUR
T1 - Uranium immobilization by sulfate-reducing biofilms grown on hematite, dolomite, and calcite
AU - Marsili, Enrico
AU - Beyenal, Haluk
AU - Di Palma, Luca
AU - Merli, Carlo
AU - Dohnalkova, Alice
AU - Amonette, James E.
AU - Lewandowski, Zbigniew
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2007/12/15
Y1 - 2007/12/15
N2 - Biofilms of sulfate-reducing bacteria Desulfovibrio desulfuricans G20 were used to reduce dissolved U(VI) and subsequently immobilize U(IV) in the presence of uranium-complexing carbonates. The biofilms were grown in three identically operated fixed bed reactors, filled with three types of minerals: one noncarbonate-bearing mineral (hematite) and two carbonate-bearing minerals (calcite and dolomite). The source of carbonates in the reactors filled with calcite and dolomite were the minerals, while in the reactor filled with hematite it was a 10 mM carbonate buffer, pH 7.2, which we added to the growth medium. Our five-month study demonstrated that the sulfate-reducing biofilms grown in all reactors were able to immobilize/reduce uranium efficiently, despite the presence of uranium-complexing carbonates.
AB - Biofilms of sulfate-reducing bacteria Desulfovibrio desulfuricans G20 were used to reduce dissolved U(VI) and subsequently immobilize U(IV) in the presence of uranium-complexing carbonates. The biofilms were grown in three identically operated fixed bed reactors, filled with three types of minerals: one noncarbonate-bearing mineral (hematite) and two carbonate-bearing minerals (calcite and dolomite). The source of carbonates in the reactors filled with calcite and dolomite were the minerals, while in the reactor filled with hematite it was a 10 mM carbonate buffer, pH 7.2, which we added to the growth medium. Our five-month study demonstrated that the sulfate-reducing biofilms grown in all reactors were able to immobilize/reduce uranium efficiently, despite the presence of uranium-complexing carbonates.
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U2 - 10.1021/es071335k
DO - 10.1021/es071335k
M3 - Article
C2 - 18200862
AN - SCOPUS:37249032469
VL - 41
SP - 8349
EP - 8354
JO - Environmental Science & Technology
JF - Environmental Science & Technology
SN - 0013-936X
IS - 24
ER -