2011
GPRA Goal/Annual Target | SC GG 3.1/2.48.1 Refine subsurface transport models by developing computational methods to link important processes impacting contaminant transport at smaller scales to the field scale. |
1st Quarter Measures | Provide a report that describes how advanced computational models can be used to better understand multiscale processes that effect contaminant transport at field scales. |
1st Quarter Results | Click here for PDF Program Contact: Peter Lichtner |
2nd Quarter Measures | Provide a report on computational methods linking genome-enabled understanding of microbial metabolism with reactive transport models to describe processes impacting contaminant transport in the subsurface. |
2nd Quarter Results | Click here for PDF Program Contact: Timothy Scheibe |
3rd Quarter Measures | Provide a report to describe how advanced computational methods can be used to assess parameter sensitivity in field scale reactive transport models. |
3rd Quarter Results | Click here for PDF Program Contact: Gary Curtis |
4th Quarter Measures | Provide a report to describe how advanced computational methods can be used to assimilate multiscale field data sets and estimate reactive transport model parameters. |
4th Quarter Results | Click here for PDF Program Contact: Yoram Rubin |
2010
GPRA Goal/Annual Target | SC GG 3.1/2.48.1 Develop a reactive transport model for a complex field site that accounts for heterogeneity and objectively evaluate against field data. |
1st Quarter Measures | Provide a report that describes how physical heterogeneities can be represented for the field site in a 3-D context. |
1st Quarter Results | Click here for PDF Program Contact: John Zachara |
2nd Quarter Measures | Provide a report that describes the development of a field scale reactive transport simulator from laboratory scale studies that includes kinetic adsorption/desorption processes. |
2nd Quarter Results | Click here for PDF Program Contact: John Zachara |
3rd Quarter Measures | Provide a report that describes pre-modeling calculations of a planned reactive transport field experiment along with comparative results from the completed experiment. |
3rd Quarter Results | Click here for PDF Program Contact: John Zachara |
4th Quarter Measures | Provide a report that reconciles the differences between model simulations of the field experiment and field data, and posses a path forward for future modeling to account for site complexity. |
4th Quarter Results | Click here for PDF Program Contact: John Zachara |
2009
GPRA Goal/Annual Target | SC GG 3.1/2.48.1 Test geophysical techniques that measure parameters controlling contaminant movement under field conditions in at least two distinct subsurface environments. |
1st Quarter Measures | Provide a report to describe how geophysical data can be used to quantify subsurface architecture that influences flow. |
1st Quarter Results | Click here for PDF Program Contact: Susan Hubbard |
2nd Quarter Measures | Provide a report to describe how geophysical data can be used to estimate properties that control flow and transport. |
2nd Quarter Results | Click here for PDF Program Contact: Susan Hubbard |
3rd Quarter Measures | Provide a report outlining how time-lapse geophysical methods can be used to monitor subsurface hydrobiogeochemical processes associated with natural or engineered perturbations. |
3rd Quarter Results | Click here for PDF Program Contact: Susan Hubbard |
4th Quarter Measures | Provide a report describing how geophysical data can be used to improve the numerical representation of hydrobiogeochemical processes within predictive subsurface models. |
4th Quarter Results | Click here for PDF Program Contact: Susan Hubbard |
2008
GPRA Goal/Annual Target | SC GG 3.1/2.48.1 Identify the critical redox reactions and metabolic pathways involved in the transformation/ sequestration of at least one key DOE contaminant in a field environment. |
1st Quarter Measures | Provide a report documenting the approach to identify critical redox reactions in the subsurface during stimulated uranium biotransformation |
1st Quarter Results | Click here for PDF Program Contact: Phil Long |
2nd Quarter Measures | Provide a report that documents the approach to identify key microbial metabolic processes in the subsurface during stimulated uranium biotransformation |
2nd Quarter Results | Click here for PDF Program Contact: Phil Long |
3rd Quarter Measures | Provide a report that evaluates collected field results on critical redox processes affecting uranium transport with computer simulations of uranium biotransformation |
3rd Quarter Results | Click here for PDF Program Contact: Phil Long |
4th Quarter Measures | Provide a report that evaluates collected field results on microbial metabolic processes with the detected changes in redox reactions in situ during uranium biotransformation |
4th Quarter Results | Click here for PDF Program Contact: Phil Long |
2007
GPRA Goal/Annual Target | SC GG 3.1/23.1 Implement a field-oriented, integrated experimental research program to quantify coupled processes that control reactive transport of at least one key DOE contaminant. |
1st Quarter Measures | Announce at least one award from solicitation 06-16 for a field research effort targeting coupled processes with application to at least one key DOE contaminant |
1st Quarter Results | January 8, 2007 ERSD (now CESD) funds three field sites for subsurface contaminant transport research: BER’s Environmental Remediation Sciences Division (ERSD (now CESD)) has established three large field sites for conducting subsurface research on the fate and transport of DOE contaminants. These five year, $3M/year awards will fund multi-disciplinary teams of scientists working at DOE sites to make significant advances in the conceptual understanding and computational simulation of subsurface processes affecting contaminant transport at the field scale. These sites also will provide samples and site access to scientists within ERSD (now CESD) programs to further test small scale, laboratory-derived hypotheses at larger scales in the field under environmentally relevant conditions. The three sites are located on the Oak Ridge Reservation, at the Hanford 300 Area, and at a uranium mill tailings site in Rifle, Colorado. Lead PIs for these projects were asked to coordinate with the local EM or LM offices to align basic science needs in support of subsurface cleanup and/or long term stewardship decisions with the science goals of the project. Program Contact: Robert T. Anderson (SC-23.4) 301-903-5549 |
2nd Quarter Measures | March 30, 2007 Implementation Plan for the Integrated Field-Scale Challenge (IFRC) project at the Oak Ridge Field Research Center (ORFRC) Oak Ridge, Tennessee |
2nd Quarter Results | Click here for results (pdf) |
3rd Quarter Measures | Site visit by ERSD (now CESD) program manager to project. |
3rd Quarter Results | From: Bayer, Paul Sent: Friday, June 29, 2007 3:58 PM To: Kuperberg, Michael Cc: Riches, Mike; Bayer, Paul Subject: ERSD (now CESD) FY 2007 Third Quarter PART/JOULE Milestone and ResultsDear Dr. Kuperberg,The fiscal year 2007 third quarter JOULE milestone calls for the ERSD (now CESD) program manger to conduct a site visit to the Oak Ridge Integrated Field Challenge (IFRC) project established in the first quarter of FY 2007.As the program manager for the Oak Ridge Integrated Field Challenge (IFRC) project, and in accordance with the 3rd quarter JOULE milestone, I conducted a site visit of the Oak Ridge, Tennessee, IFRC from Monday, June 25, 2007 to Tuesday, June 26, 2007. During this two-day site visit, I met with the principal investigator, Dr. Phil Jardine, and the Field Site Manager, Mr. David Watson. Together, we toured the field site. In addition, we met to discuss the status of the Implementation Plan, future verbal and written communication mechanisms, and IFRC plans for managing the activities of all participating investigators and institutions.Paul Bayer Program Manager, Oak Ridge IFRC (301) 903-5324 [email protected] Environmental Remediation Sciences Division Office of Biological and Environmental Research |
4th Quarter Measures | Year 1 Implementation Plan progress report delivered from project. |
4th Quarter Results | 4th Quarter Measures September 30, 2007 Implementation Plan progress report for the Integrated Field-Scale Challenge (IFRC) project at the Oak Ridge Field Research Center (ORFRC) Oak Ridge, Tennessee Click here for results (pdf) |
Weight | 20% |
2006
GPRA Goal/Annual Target | (SC GG 5.21.1) Develop predictive model for contaminant transport that incorporates complex biology, hydrology, and chemistry of the subsurface. Validate model through field |
1st Quarter Measures (Istok, due 12/31/05) | Report results of updated small-scale model using recent advances in understanding of coupled thermodynamic and biologic factors to predict changes in Oak Ridge Field Research Center microbial community composition in response to exogenous alterations in subsurface chemistry. |
1st Quarter Results | Click here for results |
2nd Quarter Measures (Parker, due 3/31/05) | Run updated large-scale 3-D flow and chemical transport model for the Oak Ridge Field Research Center site based on new information on biogeochemistry, groundwater and subsurface media. |
2nd Quarter Results | Click here for results |
3rd Quarter Measures (Istok, due 6/30/05) | Compare model results from Q1 to corresponding Oak Ridge Field Research Center field data and report results. |
3rd Quarter Results | Click here for results |
4th Quarter Measures (Parker, due 9/30/05) | Compare model results from Q2 to corresponding Oak Ridge Field Research Center field data and report results. |
4th Quarter Results | Click here for results |
2005
GPRA Goal/Annual Target | (SC GG 5.21.1) Determine scalability of laboratory results in field experiments – Conduct two sets of field experiments to evaluate biological reduction of chromium and uranium by microorganisms and compare the results to laboratory studies to understand the long term fate and transport of these elements in field settings. |
1st Quarter Measures | Conduct monitoring at Old Rifle UMTRA experimental site and collect data on the bioreduction of uranium. |
1st Quarter Results | From: Long, Philip E [mailto:[email protected]] Sent: Tuesday, January 11, 2005 12:35 PM To: Kuperberg, Michael Cc: Bayer, Paul; Anderson, Todd Subject: ESRD First Quarter FY-2005 Performance MeasureTo: Dr. J. Michael Kuperberg, Acting Director Environmental Remediation Sciences Division Office of Biological and Environmental Research SC-75/Germantown Building U.S. Department of Energy 1000 Independence Avenue, SW Washington, D.C. 20585-1290Subject: ERSD (now CESD) FY05 First Quarter Performance MeasureDear Dr. Kuperberg,In the first quarter of 2005, sampling of groundwater was conducted at an experimental field site in Old Rifle, Colorado, and samples were analyzed for U concentrations. ERSD (now CESD) FY05 First Quarter Performance Measure entitled “Conduct monitoring at Old Rifle UMTRA experimental site and collect data on the bioreduction of uranium” was successfully met by this activity.Monitoring (sampling) of groundwater wells was done as a follow up to an in situ acetate amendment experiment designed to stimulate growth of metal-reducing bacteria such as Geobacter. Uranium concentrations in groundwater down gradient decreased in a fashion similar to a 2002 field experiment except that the 2004 field experiment was terminated prior to development of extensive sulfate reduction. The decrease in U(VI) paralleled dominance of Geobacter in groundwater samples, strongly indicating that Geobacter is responsible for enzymatic reduction of U(VI) in situ (based on research of Derek Lovley et al. in progress). Monitoring of the minigallery in the first quarter of FY-2005 shows that U(VI) rebounded by an average of 47% and a maximum of 78%. This result is interpreted to reflect the short duration of the 2004 acetate amendment (~1 month), producing less total biomass than longer experiments. Microbially mediated U(VI) reduction thus may not be sustained post-acetate injection as appears to be the case after longer experiments.For additional information on this performance measure, please see http://www.pnl.gov/nabir-umtra/monitor.stmPRINCIPAL INVESTIGATOR: Philip E. Long Phone: 509 372-6090 FAX: 509 372-6089 Pacific Northwest National Laboratory Mail Stop K9-33; P.O. Box 999, Richland, WA 99352 E-mail:[email protected]: Derek R. Lovley(1), Kelly Nevin(1), Regina O’Neil(1), C. T. Resch(2), Aaron Peacock(3), Helen Vrionis(1), Yun-Juan Chang(3), Dick Dayvault(4), Irene Ortiz-Bernad(1), Ken Williams(5), Susan Hubbard(5), Steve Yabusaki(2), Yilin Fang(2), and D. C. White(2)1: University of Massachusetts, Amherst, MA; 2: Pacific Northwest National Laboratory, Richland, WA; 3: University of Tennessee, Knoxville, TN; 4: S. M. Stoller Corporation, U.S. Department of Energy, Grand Junction, CO; 5: Lawrence Berkeley National Laboratory, Berkeley, CA. |
2nd Quarter Measures | Conduct Hydrogen Releasing Compound (HRC) injection monitoring at Hanford chromium contamination site and collect data on the bioreduction of chromium. |
2nd Quarter Results | From: Terry C. Hazen <[email protected]> Date: March 14, 2005 4:58:27 PM PST To: Kuperberg Mike <[email protected]>, Bayer Paul <[email protected]> Cc: Faybishenko Boris A <[email protected]> Subject: 2005 Milestone Summary for Hanford 100H Field Studies. Dear Dr. Kuperberg,Below you will find the most recent summary of results from our Field Studies at Hanford 100H. Details, including figures, papers, and data can be found at the project website: http://www-esd.lbl.gov/ERT/hanford100h/index.htmlPlease let us know if you need an further information.1. Overall Objective and Hypothesis Overall Objective: To carry out field investigations to assess the potential for immobilizing and detoxifying chromium-contaminated groundwater using lactate-stimulated bioreduction of Cr(VI) to Cr(III) at the Hanford 100H site.Hypothesis: Lactate (Hydrogen Release Compound—HRCTM) injection into chromium contaminated groundwater through an injection well will cause bioreduction of chromate [Cr(VI)] and precipitation of insoluble species of [Cr(III)] on soil particles, probably catalyzed at oxide surfaces, at the field scale.2. Types of Investigations Performed We have conducted a series of bench-scale and field-scale integrated treatability studies, including the following types of investigations:1. Pilot field-scale biostimulation of the groundwater was conducted, using injection of 40 lbs of 13C-labeled HRC into the injection Well 699-96-45 (followed by Br-tracer injection) over the depth interval from 44 ft to 50 ft within the Hanford formation. Pumping from the monitoring well 699-96-44 started immediately after the injection on August 3, 2004, and continued for 27 days.5. Pre- and post-HRC injection groundwater sampling was performed from 5 water samplers in each borehole. During pumping, samples of pumped water were collected and on-site measurements using the Hydrolab (DO, pH, Redox potential, electrical conductivity, and temperature) were performed. Hydrolab measurements were also conducted after the pumping was ceased.6. Groundwater sampling was conducted initially weekly and then monthly.7. Microbial analyses of water samples included: Acridine orange direct counts and molecular analyses—PLFA, 16S GeneChi, and Clone library, and qPCR.8. Analytical analyses of anions in water samples included analyses of: bromide (tracer added to the injection well), chloride and phosphate (added to HRC), acetate (byproduct of HRC microbial metabolism, nitrate and sulfate (present in groundwater under background conditions9. Analytical analyses of cations in water samples included the determination of Cr(VI), total Cr, and Fe(II) and total Fe.10. Water samples were analyzed to determine carbon, nitrate, and oxygen isotopic compositions.3. Main Results We have investigated coupled hydraulic, geochemical, and microbial conditions, which are necessary to maximize the extent of Cr(VI) bioreduction and minimize the Cr(III) reoxidation in groundwater.1. Pilot field-scale biostimulation of the groundwater shows microbial cell counts reached the maximum of 2×107 cells g-1 13-17 days after the injection. The HRC injection generated highly reducing conditions: DO dropped from 8.2 to 0.35 mg/l, Redox Potential—from 240 to -130 mV, and pH—from 8.9 to 6.5.2. After pumping was ceased (under conditions of natural regional groundwater flow): DO, Redox, and pH began to recover to background values. High biomass in groundwater lasted for 2 months and then decreased to values even less than those under pre-HRC-injection conditions. PLFA and direct counts both indicated similar biomass changes; however, the PLFA also indicated an increase during the last 2 months at one depth in Well 45. Carbon isotope ratios of DIC decreased, but remain above background in Well 699-96-44 and within the injection interval in Well 699-96-45 until December 2004.3. No measurable methane was detected in samples tested. No methanogens were detected by 16s rDNA or by PLFA.4. PLFA indicated low microbial diversity under background conditions, which increased after injection and continued to increase for the first 6 weeks, followed by the decrease in the microbial diversity. A similar pattern was observed using the 16s rDNA chip analyses. 5. The isotopic composition of nitrate is consistent with that of natural background sources (not agricultural origin) with minor modification due to biodegradation. Low oxygen isotope ratios may indicate high concentrations of nitrite. 6. Geophysical investigations show that HRC products injected into groundwater can be detected using radar and seismic survey. High spatial resolution data are being used to illustrate the distribution of the HRC between the wells over time. One of the unresolved problems is the effect of changes in metal concentration on electrical conductivity. At different times, EM, radar, and seismic were sensitive to subsurface changes caused by HRC injection. 7. 13C ratios in dissolved inorganic carbon confirmed microbial metabolism of HRC. 13C ratios remain elevated (above background values) after 6 months. Increase in carbon isotope ratios of DIC in Well 44 are coincident with increases in bromide, chloride and acetate and decreases in nitrate. Chloride was determined to be from the HRC. 8. Hydrogen sulfide production was first observed after about 20 days post-injection, which corresponds with the enrichment of a Desulfovibrio species (sulfate reducer) identified using 16s rDNA microarray and monitored by direct fluorescent antibodies. DO and nitrate began to return to background concentrations two months after HRC injection, despite bacterial densities remaining high (>107 cells/ml). 9. Cr(VI) concentrations in the monitoring and pumping wells decreased significantly and remained below up-gradient concentrations even after 6 months, when reducing conditions and microbial densities had returned to background concentrations and density. |
From: “Enloe, Sonia Y” <[email protected]> Date: April 15, 2005 4:38:57 PM PDT To: [email protected] Cc: [email protected], [email protected], “Fredrickson, Jim K” <[email protected]>, [email protected], [email protected], “Zachara, John M” <[email protected]>, “Enloe, Sonia Y” <[email protected]>, “Ray, Douglas” <[email protected]>, “Bolton, Harvey Jr” <[email protected]> Subject: ERSD (now CESD) FY05 Second Quarter Performance Measure for Bioreduction of UraniumDear Dr. Kuperberg:In this note Dr. Jim Fredrickson and I summarize recent PNNL laboratory research on the bioreduction of uranium by a metal-reducing bacterium. Experimental procedures, measurements, and experimental observations that support the conclusions noted herein are presented in a poster that is posted on the NABIR web site. A publication is currently in preparation based on these findings. This work will be presented at the 2005 Annual NABIR Principal Investigators Meeting to be held April 18-20, 2005 in Warrenton, Virginia. We find these results to be fascinating and significant. Please let us know if you need or desire additional information on the research or its implications to subsurface uranium migration and remediation.1. Overall Objective and Hypothesis Overall Research Objective: To perform laboratory investigations on intra- and extra-cellular microbiologic mechanisms of uranium reduction, and to characterize the effect of these mechanisms on the localization point (periplasm, cell envelope, or bathing electrolyte), properties (e.g., size, aggregation state, protein content, etc.), and reactivity (e.g., oxidation rate) of biogenic uranite (UO2(s)). This objective provides basic scientific information in support of bioremediation concepts to eliminate mobile uranium from groundwater.Background: Shewanella oneidensis MR-1 reduces a wide range of metals and radionuclides and produces many periplasmic and outer membrane associated c-type cytochromes that are believed to facilitate the transfer of electrons to metal ions external to the cell including solid metal oxides. Depending on condition, bioreduced U(IV) can accumulate in the MR-1 periplasm, on the cell envelope, or within the bathing electrolyte/media. The mechanisms controlling the localization point of biogenic (UO2(s)) are unclear. Genomic analysis of MR-1 has revealed that this organism possesses a functional type II protein secretion pathway (T2S) that appears to be involved in the proper localization of certain cytochromes and possibly in the localization of other proteins involved in the reduction of U(VI) and translocation of periplasmic (UO2(s)) nanoparticles to the cell surface and beyond.Hypothesis: The T2S system: i.) facilitates uranium(IV) nanoparticle export across the outer membrane, and ii.) correctly localizes U(VI) reducing proteins (c-type cytochromes) in the outer membrane.Methodology: To characterize the role of c-type cytochromes and the T2S in the reduction of U(VI), a series of cytochrome gene deletion and insertional mutants interrupting critical genes in the T2S pathway were constructed and characterized for phenotypic differences when using uranium as the terminal electron acceptor. Bioreduction/localization experiments were performed in batch laboratory incubations under anaerobic conditions with uranyl acetate as the uranium form. Transmission electron microscopy (TEM) with selected area diffraction (SAED) and synchrotron x-ray fluorescence microscopy were applied to study the localization, and crystallochemical character of the (UO2(s)).2. Important Findings A. The reduction of U(VI) by MR-1 results in extracellular accumulation of crystalline UO2(s) nanoparticles (≈5 nm), with some in association with fiber-like biostructures.B. The T2S system is not essential for the reduction of U(VI) by MR-1, but is necessary for the extracellular localization of reduced UO2(s) nanoparticles. Mutants in the T2S pathway (gspD- or gspG-) accumulated UO2(s) in the periplasm and at the outer membrane surface. The T2S system appears to eliminate periplasmic UO2(s), thereby eliminating potential deleterious effects of its accumulation.C. U(VI) reduction was abolished by an insertion in the c-type cytochrome maturation pathway gene ccmC, indicating a functional role for one or more c-type cytochromes in U(VI) reduction.D. The extracellular reduction of U(VI) by MR-1 is facilitated by several c-type cytochromes (MtrA, MtrC, and OmcA) and a related membrane protein (MtrB), while other mtr deletions (mtrD-, mtrE-, or mtrF-) had little effect on U(VI) reduction.E. In MR-1, extracellular co-localization of U with Fe and P was present on extended fiber-like biostructures; the composition of the biostructures and their high reactivity for U implied that they were lipid-containing features (e.g., lipid bilayers, membrane extensions) that contained c-type cytochromes. In contrast, only periplasmic UO2(s) was observed in MtrC-/OmcA- cells.3. Implications Active uranium(IV) reduction occurs within the periplasm and on extended cytochrome-containing biostructures with MR-1. These points of enzymatic reduction regulate the size of the uranite precipitates to a narrow range (e.g., 3-7 nm), for reasons as yet unknown. The T2S system appears responsible for extracellular transport of periplasmic UO2(s), as a possible detoxification response, and/or localization of U(VI)-reducing cytochromes to the outer surfaces of the cells. The association of nano-crystalline UO2(s) with the extracellular biostructures may have an important influence on their long term stability and transport in the environment. Preliminary studies indicate that this form of uranite is particularly resistant to oxidation, a beneficial attribute for bioremediation.John M. Zachara, Ph.D. Sr. Chief Scientist for Environmental Chemistry Fundamental Sciences Directorate Pacific Northwest National Laboratory PO Box 999; MS K8-96 Richland, WA 99352 E-Mail: [email protected] Phone: (509) 376-3254 Fax: (509) 376-3650 |
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3rd Quarter Measures | Report results of Old Rifle field experiments and compare to previous laboratory studies. |
3rd Quarter Results | From: Long, Philip E [mailto:[email protected]] Sent: Wednesday, June 29, 2005 1:43 AM To: Kuperberg, Michael Cc: Bayer, Paul; Anderson, Todd Subject: ESRD Third Quarter FY-2005 Performance MeasureTo: Dr. J. Michael Kuperberg Acting Director Environmental Remediation Sciences Division Office of Biological and Environmental Research SC-75/Germantown Building U.S. Department of Energy 1000 Independence Avenue, SW Washington, D.C. 20585-1290Subject: ERSD (now CESD) FY05 Third Quarter Performance MeasureDear Dr. Kuperberg,In the third quarter of 2005, sampling and analysis of groundwater continued at the Old Rifle field site in Rifle, CO. Evaluation and publication of results is ongoing (see publication list, http://www.pnl.gov/nabir-umtra/pubs.stm). ERSD (now CESD) FY05 Third Quarter Performance Measure entitled “Report results of Old Rifle field experiments and compare to previous laboratory studies” was successfully met by these activities.Recent analyses and data include1) U(VI) removal rates for field experiments and laboratory incubations 2) Observation of dissolved oxygen (DO) stratification in the Old Rifle alluvial sediments during spring runoff and its relationship to increases in U(VI) concentration 3) Progress in reactive transport modeling that accounts for bioreduction of U(VI), mineral equilibria, and groundwater flux and dispersion, including the concept of adapting the reactive transport model to modeling of bottle incubations.Overall, the results show that removal of U(VI) in field experiments is approximately an order of magnitude slower than in bottle incubations. This is expected since bottle incubations are closed systems and field experiments are open systems with flowing groundwater. The difference in U(VI) removal rates underscores the importance of field experiments for measuring key in situ rate parameters in systems undergoing bioreduction of variable redox contaminants. Monitoring of U concentrations during high spring runoff at the Rifle site has now shown a positive correlation between rising, oxygenated groundwater and U(VI) concentration. We anticipate using lab-scale experiments to constrain the mechanistic processes involved in a way that will enable us to better predict the behavior of bioreduced U(IV) under oxidizing conditions. Finally, reactive transport modeling is beginning to match observed field data. As this research progresses we will incorporate all the significant hydrologic, geochemical, and microbial processes into the model, fully rationalizing field and laboratory experimental results.For the full report on this performance measure, please see http://www.pnl.gov/nabir-umtra/monitor.stmPRINCIPAL INVESTIGATOR: Philip E. Long Phone: 509 372-6090 FAX: 509 372-6089 Pacific Northwest National Laboratory Mail Stop K9-33; P.O. Box 999, Richland, WA 99352 E-mail:[email protected]: Derek R. Lovley(1), Kelly Nevin(1), Regina O’Neil(1), C. T. Resch(2), Aaron Peacock(3), Helen Vrionis(1), Yun-Juan Chang(3), Dick Dayvault(4), Irene Ortiz-Bernad(1), Ken Williams(5), Susan Hubbard(5), Steve Yabusaki(2), Yilin Fang(2), and D. C. White(2)1: University of Massachusetts, Amherst, MA; 2: Pacific Northwest National Laboratory, Richland, WA; 3: University of Tennessee, Knoxville, TN; 4: S. M. Stoller Corporation, U.S. Department of Energy, Grand Junction, CO; 5: Lawrence Berkeley National Laboratory, Berkeley, CA. |
4th Quarter Measures | Report results of Hanford field experiments and compared to previous laboratory studies. |
4th Quarter Results | From: Hazen Terry C. [mailto:[email protected]] Sent: Friday, September 16, 2005 8:26 PM To: Kuperberg, Michael Cc: Bayer, Paul; Anderson, Todd; Faybishenko Boris A Subject: 4th Quarter Performance measureDear Dr. Kuperberg,The HRC injection done more than a year ago is still showing that it is stimulating bioactivity in keeping Cr(IV) at undetectable levels. Our most recent data shows that the bioactivity that we are seeing is from the 13C labeled lactate that we originally injected. The summary report for this quarter follows.Kind Regards,TerryTerry C. Hazen, Ph. D. Senior Staff Scientist Head, Ecology Department Head, Center for Environmental Biotechnology Co-Director, Virtual Institute Microbial Stress and Survival Earth Sciences Division, Lawrence Berkeley National Laboratory, University of California MS70A-3317, One Cyclotron Rd. Berkeley, CA 94720 Phone: 510-486-6223, Cell: 707-631-6763 Email: [email protected] URL: www-esd.lbl.gov/ECOField Investigations of Lactate-Stimulated Bioreduction of Cr(VI) to Cr(III) at the Hanford 100-H Area4th Quarter FY05 – summary report- In comparison to previous laboratory studies the electron donor (HRC) has persisted longer then expected. In the laboratory the HRC was depleted in a matter of weeks, while in the field it has persisted more than 12 months. This has kept microbial activity, especially in the less permeable area higher and Cr(VI) at undetectable levels. Previous laboratory tests also showed that the reduced Cr would stay reduced for long periods of time with only minor reoxidation, this trend is also being observed in the field.- Field investigations conducted during the 4th quarter of FY05 aimed at the evaluation of the longevity of HRC in groundwater, which was injected on August 2, 2004.- During the 4th quarter, investigations included collecting water samples for the determination of the microbial populations, Cr and Fe concentrations, and redox conditions in water samples collected before, during, and after the groundwater pumping test that was conducted from June 6-July 11, 2005. Groundwater was withdrawn from the monitoring well 699-96-44.- Water samples were collected from both wells (699-96-44 and 699-96-45) along with on site measurements of pH, DO, electrical conductivity, redox potential, and temperature. Br-tracer test was conducted in conjunction with the pumping test (tracer was added to the injection well 699-96-45).- Geophysical (seismic and radar) cross-borehole measurements were performed to attempt to delineate the spatial distribution of the zone affected by biostimulation.- Microbial analyses of groundwater samples included: Acridine orange direct counts and molecular analyses-PLFA, 16S GeneChip, clone library, and qPCR. Analytical analyses of groundwater samples included bromide, chloride and phosphate (added to HRC), acetate (byproduct of HRC microbial metabolism, nitrate and sulfate (present in background groundwater). Analytical analyses of metals in filtered groundwater samples included Cr(VI), total Cr, and Fe(II) and total Fe.- The initial drop in the DO concentration, redox potential, and soluble Cr(VI) and total Cr concentrations in water samples collected from all water samplers clearly indicates that one year after the HRC injection a small amount of HRC was still present in the Hanford aquifer. As pumping progressed, it is likely that some Cr- contaminated water from the surrounding area mixed with the initial HRC-effected groundwater, causing redox conditions and microbial densities to return to practically background levels. At the same time, the soluble Cr(VI) concentration increased in the pumped water and a water sample at a depth of 42 ft, but did not reach background concentrations. The soluble Cr(VI) concentration in all other water samples from both the injection and monitoring wells remained below the detectable limit (<0.28 mg/L). The total Cr concentration in the monitoring well decreased by a factor of 4 compared to that under background conditions. The preliminary analysis clearly indicates the successful effect of application of HRC for Cr(VI) bioreduction over a period of one year.- To assess a potential effect of Cr(VI) reoxidation under field conditions, we developed a field work plan to continue, including drilling and coring of 3 new wells in the vicinity of existing wells at Hanford 100H site. These wells will then be completed for collecting water samples before and after a new HRC injection test. |
Weight | 20% |
2004
GPRA Goal/Annual Target | (SC GG 5.21.1) Perform combined field/laboratory/modeling to determine how to interpret data at widely differing scales. Quantify contaminant immobilization and remobilization using one or a combination of the following potential pathways: natural microbial mechanisms, chemical reactions with materials, and colloid formation. |
1st Quarter Measures | Publish peer-reviewed results of first field experiment to stimulate microbial communities to immobilize uranium contamination plume at Uranium Mill Tailings Remediation Action (UMTRA) site in Rifle, Colorado |
1st Quarter Results | Yes. Publication in October 2003 issue of Applied & Environmental Microbiology |
2nd Quarter Measures | Initiate push-pull experiments to immobilize uranium with humics at the NABIR Field Research Center |
2nd Quarter Results | Yes. Preliminary results described at March 2004 NABIR PI meeting (pdf) |
3rd Quarter Measures | Complete laboratory microcosm experiments on mechanisms of microbial reoxidation of uranium |
3rd Quarter Results | Yes. Results described at March 2004 NABIR PI meeting (pdf) |
4th Quarter Measures | Conduct field site monitoring to quantify uranium remobilization at the Old Rifle, CO UMTRA site |
4th Quarter Results | Yes. 4th Quarter target and annual target met. Supporting Documentation: Results on NABIR-UMTRA website (http://www.pnl.gov/nabir-umtra/index.stm). |
Weight | 20% |