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Records 1 to
25
of 37 records from author Ralph Ludwig
2021
Wilkin, Richard T., Tony R. Lee, Ralph D. Ludwig, C. Wadler, William Brandon, B. Mueller, E. Davis, D. Luce, AND T. Edwards. Rare-Earth Elements as Natural Tracers for In-situ Remediation of Groundwater. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 55:1251-1259, (2021). https://doi.org/10.1021/acs.est.0c06113
Wilkin, Rick, A. Williams, V. Zartarian, L. Wyatt, N. Tulve, K. Bradham, R. Devereux, D. Cutt, F. Barnett, R. Ludwig, E. Barth, T. Luxton, B. Butler, F. Kremer, A. Hall, B. Schumacher, AND J. Zimmerman. SHC BOSC Topic 1 Review of Research Areas 2, 3, 4 and Lead. SHC Topic 1 BOSC SC Meeting, N/A (Virtual), N/A (Virtual), March 30 - April 01, 2021.
2018
Wilkin, Richard T., R. Ludwig, AND T. Lee. Rare Earth Elements: Potential Natural Tracers for In-situ Remediation of Groundwater. 2018 Chlorinated Conference, Palm Springs, California, April 08 - 12, 2018.
2017
Huling, J., Scott G. Huling, AND R. Ludwig. Enhanced adsorption of arsenic through the oxidative Treatment of Reduced Aquifer Solids. WATER RESEARCH. Elsevier Science Ltd, New York, NY, 123:183-191, (2017). https://doi.org/10.1016/j.watres.2017.06.064
2015
Ludwig, R., D. Beak, Rick Wilkin, AND C. Ruybal. Retrospective Case Study in Northeastern Pennsylvania, Study of the Potential Impacts of Hydraulic Fracturing On Drinking Water Resources. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-14/088, 2015.
2012
Ludwig, R., Richard T. Wilkin, Steve Acree, R. Ross, AND K. Higgins-Coltrain. Performance Monitoring: Evaluating an Organic Carbon-Limestone PRB for Treatment of Heavy Metals and Acidity. IN: Technology News & Trends, U.S. EPA Office of Superfund Remediation and Technology Innovation, Washington, DC, (60):5-7, (2012).
2011
SU, C., R. D. LUDWIG, AND R. PULS. Chemical Reductive Treatment of Groundwater Chromate and Chlorinated Ethenes: Tests at Two Field Sites. Presented at 2011 International Conference on Groundwater Contamination and Water System Security, Beijing, CHINA, December 01 - 02, 2011.
LUDWIG, R. D., C. SU, AND R. T. WILKIN. Permeable Reactive Barriers for Treatment of Cr6. Presented at 4th International Contaminated Site Remediation Conference, Adelaide, AUSTRALIA, September 11 - 15, 2011.
2009
LUDWIG, R. D., D. J. Smyth, D. W. Blowes, L. E. Spink, R. T. WILKIN, D. G. JEWETT, AND C. J. Weisener. Treatment of Arsenic, Heavy Metals, and Acidity Using a Mixed ZVI-Compost PRB. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 43(6):1970-1976, (2009).
2008
LUDWIG, R. D., D. G. JEWETT, AND ANN AZADPOUR-KEELEY. TREATMENT OF METALS IN GROUND WATER USING AN ORGANIC-BASED SULFATE-REDUCING PERMEABLE REACTIVE BARRIER. Presented at 2008 Annual Meeting of the Society for Industrial Microbiology, San Diego, CA, August 10 - 14, 2008.
LUDWIG, R. D., C. SU, T. R. LEE, R. T. WILKIN, AND B. M. SASS. IN SITU SOURCE TREATMENT OF CR(VI) USING A FE(II)-BASED REDUCTANT BLEND: LONG-TERM MONITORING AND EVALUATION. JOURNAL OF ENVIRONMENTAL ENGINEERING. American Society of Civil Engineers (ASCE), Reston, VA, 134(8):651-659, (2008).
LUDWIG, R. D., C. SU, P. J. CLARK, F. P. BECK, AND T. R. LEE. Use of a Ferrous Sulfate - Sodium Dithionite Blend to Treat a Dissolved Phase Cr(VI) Plume. Presented at The Sixth International Conference, Remediation of Chlorinated and Recalcitrant Compounds, Monterey, CA, May 19 - 22, 2008.
2007
LUDWIG, R. D., D. G. JEWETT, ANN KEELEY, STEVE ACREE, F. P. BECK, P. J. CLARK, D. BLOWES, L. SPINK, AND D. SMYTH. GROUND WATER ARSENIC AND METALS TREATMENT USING A COMBINATION COMPOST-ZVI PRB (ABSTRACT ONLY). In Proceedings, Fifth International Conference on Remediation of Chlorinated and Recalcitrant Compounds, Monterey, CA, May 22 - 25, 2006. Battelle Press, Columbus, OH, C-31, ISBN1574771574, (2006).
LUDWIG, R. D., C. SU, T. R. LEE, R. T. WILKIN, STEVE ACREE, R. R. ROSS, AND ANN KEELEY. IN SITU CHEMICAL REDUCTION OF CR(VI) IN GROUNDWATER USING A COMBINATION OF FERROUS SULFATE AND SODIUM DITHIONITE: A FIELD INVESTIGATION. ENVIRONMENTAL SCIENCE AND TECHNOLOGY. American Chemical Society, Washington, DC, 41(15):5299-5305, (2007).
2006
LUDWIG, R. D., D. G. JEWETT, ANN AZADPOUR-KEELEY, STEVE ACREE, F. P. BECK, P. J. CLARK, D. BLOWES, L. SPINK, AND D. SMYTH. GROUND WATER ARSENIC AND METALS TREATMENT USING A COMBINATION COMPOST-ZVI PRB. Presented at Battelle's Fifth Internation Conference on Remediation of Chlorinated and Recalcitrant Compounds, Monterey, CA, May 22 - 25, 2006.
LUDWIG, R. D., D. G. JEWETT, ANN AZADPOUR-KEELEY, STEVE ACREE, F. P. BECK, P. J. CLARK, D. BLOWES, L. SPINK, AND D. SMYTH. GROUND WATER ARSENIC AND METALS TREATMENT USING A COMBINATION COMPOST-ZVI PRB. Presented at Battelle's Fifth International Conference on Remediation of Chlorinated and Recalcitrant Compounds, Monterey, CA, May 22 - 25, 2006.
2005
SU, C. AND R. D. LUDWIG. A MIXED CHEMICAL REDUCTANT FOR TREATING HEXAVALENT CHROMIUM IN A CHROMITE ORE PROCESSING SOLID WASTE. Presented at Annual Soil Science Society of America Meeting, Salt Lake City, UT, November 06 - 10, 2005.
LUDWIG, R. D., D. G. JEWETT, ANN AZADPOUR-KEELEY, F. P. BECK, S. D. ACREE, R. R. ROSS, P. K. JONES, P. J. CLARK, D. BLOWES, D. SMYTH, AND L. SPINKS. TREATMENT OF ARSENIC AND METALS IN GROUND WATER USING A COMPOST-ZVI PRB. Presented at In Situ and On-Site Bioremediation, The Eighth International Symposium, Baltimore, MD, June 06 - 09, 2005.
LUDWIG, R. D., D. G. JEWETT, ANN AZADPOUR-KEELEY, F. P. BECK, S. D. ACREE, R. R. ROSS, P. K. JONES, D. BLOWES, D. SMYTH, AND L. SPINK. TREATMENT OF ARSENIC AND METALS IN GROUND WATER USING A COMPOST-ZVI PRB. Presented at The Eighth International Symposium, In Situ and On-Site Bioremediation, Baltimore, MA, June 06 - 09, 2005.
LUDWIG, R. D. TREATMENT OF GROUND WATER WITH ZERO VALENT IRON (ZVI). Presented at Memphis Defense Depot Superfund Site Public Meeting, Memphis, TN, February 24, 2005.
Su, C. AND R Ludwig*. TREATMENT OF HEXAVALENT CHROMIUM IN CHROMITE ORE PROCESSING SOLID WASTE USING A MIXED REDUCTANT SOLUTION OF FERROUS SULFATE AND SODIUM DITHIONITE. ENVIRONMENTAL SCIENCE AND TECHNOLOGY. John Wiley & Sons, Ltd., Indianapolis, IN, 39(16):6208-6216, (2005).
2004
Ludwig*, R, C. Su, F P. Beck*, P J. Clark*, S Acree*, R R. Ross*, AND P K. Jones*. IN SITU CR(VI) TREATMENT USING A FERROUS IRON-BASED REDUCTANT. Presented at 4th Annual Int'l. Conf. on Remediation of Chlorinated & Recalcitrant Compounds, Monterey, CA, May 24, 2004.
AzadpourKeeley**, A, R Ludwig*, F P. Beck*, AND P J. Clark*. MICROBIAL CHARACTERIZATION OF MANURE BASED PERMEABLE REACTIVE BARRIER. Presented at 2004 Society for Industrial Microbiology and Biotechnology Annual Mtg., Anaheim, CA, July 25 - 29, 2004.
Ludwig*, R, D G. Jewett*, A. AzadpourKeeley*, F P. Beck*, P J. Clark*, S Acree*, R R. Ross*, D. W. Blowes, L. Spink, D. Smyth, AND S. Holcombe. TREATMENT OF ARSENIC AND METALS IN GROUND WATER USING A COMPOST/ZVI PRB.
LUDWIG, R. D., D. G. JEWETT, ANN AZADPOUR-KEELEY, AND F. P. BECK. TREATMENT OF ARSENIC AND METALS IN GROUND WATER USING A COMPOST/ZVI PRB. Presented at Remediation Technologies Development Forum (RTDF) PRB Action Team Meeting, Albuquerque, NM, October 26 - 27, 2004.