TY - JOUR
T1 - In situ long-term reductive bioimmobilization of Cr(VI) in groundwater using hydrogen release compound
AU - Faybishenko, Boris
AU - Hazen, Terry C.
AU - Long, Philip E.
AU - Brodie, Eoin L.
AU - Conrad, Mark E.
AU - Hubbard, Susan S.
AU - Christensen, John N.
AU - Joyner, Dominique
AU - Borglin, Sharon E.
AU - Chakraborty, Romy
AU - Williams, Kenneth H.
AU - Peterson, John E.
AU - Chen, Jinsong
AU - Brown, Shaun T.
AU - Tokunaga, Tetsu K.
AU - Wan, Jiamin
AU - Firestone, Mary
AU - Newcomer, Darrell R.
AU - Resch, Charles T.
AU - Cantrell, Kirk J.
AU - Willett, Anna
AU - Koenigsberg, Stephen
PY - 2008/11/15
Y1 - 2008/11/15
N2 - The results of a field experiment designed to test the effectiveness of a novel approach for long-term, in situ bioimmobilization of toxic and soluble Cr(VI) in groundwater using a hydrogen release compound (HRC) - a slow release glycerol polylactate - are described. The field experiment was conducted atthe Hanford Site (Washington), a U.S. Department of Energy nuclear production facility, using a combination of hydrogeological, geophysical, geochemical, and microbiological measurements and analyses of water samples and sediments. The results of this experiment show that a single HRC injection into groundwater stimulates an increase in biomass, a depletion of terminal electron acceptors O2, NO3-, and SO42-, and an increase in Fe2+, resulting in a significant decrease in soluble Cr(VI). The Cr(VI) concentration has remained belowthe background concentration in the downgradientpumping/ monitoring well, and below the detection limit in the injection well for more than 3 years after the HRC injection. The degree of sustainability of Cr(VI) reductive bioimmobilization under different redox conditions at this and other contaminated sites is currently under study.
AB - The results of a field experiment designed to test the effectiveness of a novel approach for long-term, in situ bioimmobilization of toxic and soluble Cr(VI) in groundwater using a hydrogen release compound (HRC) - a slow release glycerol polylactate - are described. The field experiment was conducted atthe Hanford Site (Washington), a U.S. Department of Energy nuclear production facility, using a combination of hydrogeological, geophysical, geochemical, and microbiological measurements and analyses of water samples and sediments. The results of this experiment show that a single HRC injection into groundwater stimulates an increase in biomass, a depletion of terminal electron acceptors O2, NO3-, and SO42-, and an increase in Fe2+, resulting in a significant decrease in soluble Cr(VI). The Cr(VI) concentration has remained belowthe background concentration in the downgradientpumping/ monitoring well, and below the detection limit in the injection well for more than 3 years after the HRC injection. The degree of sustainability of Cr(VI) reductive bioimmobilization under different redox conditions at this and other contaminated sites is currently under study.
UR - https://www.scopus.com/pages/publications/56449088366
U2 - 10.1021/es801383r
DO - 10.1021/es801383r
M3 - Article
C2 - 19068835
AN - SCOPUS:56449088366
SN - 0013-936X
VL - 42
SP - 8478
EP - 8485
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 22
ER -