Superfund Research Program
- 309 - Toxic Breakdown Products Formed During Contaminant Clean-Up -- Sedlak
Release Date: 09/02/2020
Chemical oxidation is a process commonly used to treat water contaminated with aromatic compounds like benzene. But, unexpected and potentially harmful breakdown products may result from this treatment process, according to a recent study from the NIEHS-funded University of California, Berkeley Superfund Research Program Center.
- 304 - Electrochemical System Degrades PCE in Groundwater -- Alshawabkeh
Release Date: 04/01/2020
An electrochemical system can effectively break down tetrachloroethylene (PCE) in groundwater, according to a new study from the NIEHS-funded Northeastern University Superfund Research Program (SRP) Center. After testing different design parameters to determine the best conditions for degrading PCE, the researchers achieved 86% removal of the contaminant from groundwater sources.
- 292 - Nitrous Oxide Halts Breakdown of Chlorinated Compounds -- Loeffler
Release Date: 04/03/2019
A new Superfund Research Program (SRP) study showed that nitrous oxide (N2O), a groundwater contaminant commonly generated from agricultural runoff, inhibits bacterial degradation of certain chlorinated contaminants, including tetrachloroethene (PCE). The study may explain why bioremediation, or the use of bacteria to break down compounds, can stall at some hazardous waste sites.
- 290 - Promising Membrane Technology Reduces Chlorobenzene in Groundwater -- Alshawabkeh, Bhattacharyya
Release Date: 02/13/2019
A new Superfund Research Program collaboration has developed a promising groundwater cleanup technology that provides an efficient, low-maintenance method of removing chlorobenzene and other compounds from water. The method integrates electrochemical oxidation, which uses electricity to transform contaminants into non-toxic substances, and membranes containing palladium (Pd), a metal used as a catalyst in many industrial chemical synthesis applications and groundwater treatment.
- 286 - Siderophores Reduce Asbestos Toxicity in Soil -- Willenbring, Christofidou-Solomidou
Release Date: 10/03/2018
Researchers have discovered that natural compounds released from bacteria and fungi in soil, known as siderophores, can decrease the toxicity of asbestos fibers. According to the authors, their results support the feasibility of asbestos bioremediation, or using organisms such as bacteria to degrade contaminants at waste sites.
- 280 - Toxic Byproducts Formed During UV Water Treatment -- Sedlak
Release Date: 04/04/2018
Common water treatment methods that remove phenols and other hazardous compounds may produce low levels of toxic byproducts, according to a new study by the University of California (UC), Berkeley Superfund Research Program (SRP) Center.
- 275 - Activated Carbon Reduces the Effects of TCDD on the Immune System and Gut Microbiome in a Mammalian Model -- Boyd, Hashsham
Release Date: 11/01/2017
Breakthroughs from the Michigan State University Superfund Research Program (MSU SRP) Center provide new evidence that activated carbon may be used to reduce health risks resulting from dioxin contamination.
- 274 - Endophytes Help Poplar Trees Clean Up TCE on Superfund Site -- Blaylock
Release Date: 10/04/2017
Poplar trees can capture and remove trichloroethylene (TCE) from the soil and degrade it. Now, a method using endophytes, symbiotic microbes that live within a plant, has been successfully shown to boost the speed and effectiveness of this natural degradation process. Researchers led by Edenspace Systems Corporation, a Superfund Research Program (SRP)-funded small business, conducted the first large-scale experiment on a Superfund site using poplar trees fortified with a microbial endophyte to clean up TCE-contaminated groundwater.
- 260 - Identifying Mechanisms for Regulating Gas Exchange in Plants -- Schroeder
Release Date: 08/03/2016
Superfund Research Program (SRP) researchers at the University of California, San Diego (UCSD) are identifying important mechanisms that plants use to respond to changes in the environment. They recently discovered molecular mechanisms that enhance the activity of proteins essential to closing stomata, or pores found on the surface of leaves, in response to environmental stressors.
- 259 - Phytostabilization of Mine Tailings with Compost-Assisted Direct Planting -- Maier
Release Date: 07/06/2016
Amending mine waste with compost is a viable and promising alternative to the expensive process of covering an entire site with a thick soil or rock cap followed by seeding, according to research from the University of Arizona Superfund Research Program (UA SRP) Center. The trial was based on successful results from preliminary greenhouse studies, which scaled effectively to the field.
- 255 - The Effect of Corrinoid Co-factors on Bioremediation of Chlorinated Compounds -- Loeffler
Release Date: 03/02/2016
Specific modifications to helper molecules, or co-factors, play an important role in how efficiently some bacteria can degrade toxic chlorinated pollutants. In a new study, researchers from the University of Tennessee found that specific chemical modifications to corrinoid co-factors, a group of molecules that includes vitamin B12, can affect how well bacteria degrade chlorinated pollutants such as tetrachloroethene (PCE) and trichloroethene (TCE). These findings could help improve cleanup of chlorinated contaminants at hazardous waste sites.
- 251 - Development of a Sustainable Remediation System to Remove TCE from Groundwater -- Alshawabkeh
Release Date: 11/04/2015
An electrochemical system can effectively remove trichloroethylene (TCE) from groundwater at high flow rates, as demonstrated by researchers at the Northeastern University Superfund Research Program (SRP) Center. They optimized the electrode material and configuration to determine the best conditions to dechlorinate TCE at a flow rate of one liter per minute, which exists in karst aquifers.
- 248 - Cellulose Nanomaterials in Environmental Cleanup Technologies -- Wiesner
Release Date: 08/05/2015
Nanomaterials made of cellulose – a natural polymer used mainly to produce paper – hold great promise in environmental remediation applications and water filtration membranes, according to Duke University Superfund Research Program (Duke SRP) researchers. In a compilation of research findings, Duke SRP researchers led by Mark Wiesner, Ph.D., outline the physical and chemical properties, production costs, and current use of cellulose nanomaterials.
- 244 - Switchgrass and Bacteria Work Together to Remove PCBs from Soil -- Schnoor, Mattes
Release Date: 04/01/2015
Researchers at the University of Iowa Superfund Research Program (Iowa SRP) Center have found that switchgrass, a plant native to central North America, can effectively remove polychlorinated biphenyls (PCBs) from contaminated soil. When PCB-degrading bacteria is added, removal of PCBs from the soil can increase further. This phytoremediation method may be an efficient and sustainable strategy to removing PCBs from hazardous waste sites.
- 239 - Remediation of Contaminated Groundwater by Persulfate -- Sedlak
Release Date: 11/05/2014
Researchers at the University of California (UC) Berkeley Superfund Research Program (SRP) are one step closer to developing more efficient and effective treatment systems to remove organic contaminants from groundwater and soil. Findings from a new study, led by David Sedlak, Ph.D., provide insight into adding persulfate to groundwater to break down organic contaminants, such as polychlorinated biphenyls,1,4-dioxane, and components of petroleum, that may be difficult to treat with other methods and potentially harmful to human health.
- 229 - Comparing Black Carbon Types to Sequester PBDEs in Sediments -- Gan
Release Date: 01/08/2014
Researchers from the University of California (UC), Riverside, found that the addition of black carbon reduces the bioavailability, or the fraction of chemicals that can be taken up by organisms, of polybrominated diphenyl ethers (PBDEs) in sediment. They developed a method to measure PBDE bioavailability in sediment and found that reduction in bioavailability varied greatly depending on the type of black carbon; activated carbon showed the best efficiency compared to biochar or charcoal.
- 222 - Remediation of PCB Contaminated Sediment by Bioaugmentation -- Sowers, May
Release Date: 06/05/2013
A new way to reduce hazardous polychlorinated biphenyls (PCBs) by bioaugmentation, the addition of microorganisms to degrade contaminants, could be an effective and environmentally sustainable strategy to decrease the amount of PCBs in polluted sediment.
- 211 - A New Solar-Powered Approach for Groundwater Decontamination -- Alshawabkeh
Release Date: 07/03/2012
Researchers discover a new treatment combination that delivers a one-two punch to eliminate trichloroethylene (TCE) contamination in groundwater. As an added benefit, the method can be driven by solar power for a greener approach to remediation.
- 205 - Ramping Up Mixed Metals Removal -- Calo
Release Date: 01/04/2012
To remove trace metals from water, two methods may be better than one. Brown University researchers have developed an innovative two-part strategy to safely eliminate metals from water without producing toxic sludge.
- 200 - Celebrating a Significant Milestone in Research Dissemination -- Avakian
Release Date: 08/03/2011
Remember when email was cutting-edge? SRP's Research Briefs have been reaching readers around the globe since those early days. We celebrate the 200th brief with a look at how SRP's science communication has evolved over nearly 15 years.
- 198 - Chlorinated Contaminant Remediation - Dual Function Responsive Membranes -- Bhattacharyya
Release Date: 06/01/2011
A promising new double-stacked filter inspired by membranes found in nature may help tackle trichloroethylene (TCE)the most common organic groundwater contaminant in the United States.
- 196 - Nanoparticles Enhance Imaging of Intracellular Bioreduction of Chromate -- Irudayaraj
Release Date: 04/06/2011
Researchers send tiny gold balls into bacterial cells on a mission to reveal how the cells process Chromium (VI). The bacteria's ability to transform this harmful metal to a less toxic form could make it an important ally in cleaning up Superfund sites.
- 194 - Sediment Caps That Degrade Contaminants -- Reible
Release Date: 02/02/2011
Some Superfund sites may just need a little sizzle. Researchers find that using electricity can stimulate microbial growth and help break down contaminants in underwater sediments.
- 193 - Accelerating Pump-and-Treat Remediation at Arsenic-contaminated Sites -- Chillrud, Stute, Mailloux
Release Date: 01/05/2011
Pumping contaminated groundwater to the surface to filter out toxins is time-consuming and expensive. A new process makes this method more efficient by adding chemicals to stir up toxins while the water still underground.
- 192 - Discovery of the Key to Metal Accumulation in Plants -- Schroeder
Release Date: 12/01/2010
Plants that take up hazardous metals can help clean up polluted soils, but they also can become a route of human exposure when edible crops take up pollutants. Researchers are deciphering how plants take up metals in order to better control the process.
- 186 - DEMET - Converting Waste into a Resource -- James
Release Date: 06/03/2010
In a prime example of turning lemons into lemonade, scientists have developed a method for reducing the ecological and health threats from abandoned mines by extracting and selling-at a profit-the residual metals that would otherwise seep from the mine sites into rivers and streams.
- 183 - Sequestration of Dioxin by Clays -- Boyd
Release Date: 03/03/2010
Although the organic matter in soil is often considered best for sequestering contaminants, new evidence shows that clay is as good--and perhaps better--at sequestering dioxins.
- 182 - Can Phytoremediation Work for PCBs? -- Schnoor
Release Date: 02/03/2010
A study offers the first evidence that whole plants can take up and metabolize polychlorinated biphenyls (PCBs), suggesting plants could be used to help clean up PCB-contaminated sites.
- 180 - Tools to Improve Success Rate of Bioremediation of Complex Chemical Mixtures -- Halden
Release Date: 12/02/2009
- 177 - Mechanisms Influencing Long-term Mass Flux of DNAPL Contaminants -- Brusseau
Release Date: 09/02/2009
- 168 - Zero Valent Iron for Passive Treatment of Acid Rock Drainage -- Field
Release Date: 12/03/2008
- 164 - New Nanomaterials to Capture Mercury Vapor Released from Compact Fluorescent Lamps -- Hurt
Release Date: 08/06/2008
- 163 - The Role of Soil Bacteria in Phytostabilization of Mine Tailings -- Maier
Release Date: 07/02/2008
- 160 - High-Performance Carbon-Based Mercury Sorbents -- Hurt
Release Date: 04/02/2008
- 153 - Novel High-Strength Iron Cement Sequesters Pollutants -- Curry
Release Date: 09/05/2007
- 149 - Microwave Technology for Granular Activated Carbon Regeneration -- Cha
Release Date: 05/02/2007
- 147 - Microbial and Photolytic Transformations of Environmental Contaminants -- Schuler, Linden
Release Date: 03/07/2007
- 146 - Groundwater Contamination by Perchlorate from Brines -- Hunt
Release Date: 02/07/2007
- 143 - Toxicological Assessment of Remediated Environmental Chemicals -- Trosko
Release Date: 11/01/2006
- 138 - New Technologies for Remediation of Halogenated Organics -- Arnold, Saez, Betterton
Release Date: 06/07/2006
- 131 - Advances in Photocatalytic Remediation Technology -- Kittrell
Release Date: 11/02/2005
- 123 - Nanosized Metals for Organic Detoxification -- Bhattacharyya
Release Date: 03/02/2005
- 119 - Novel Applications of Microbially-Produced Surfactants -- Maier
Release Date: 11/02/2004
- 109 - Quantifying Enhanced In Situ TCE Biodegradation -- Field
Release Date: 01/07/2004
- 103 - Clay Products in Remediation and Intervention Strategies -- Phillips
Release Date: 07/02/2003
- 90 - The Impact of Chlorine on Hexavalent Chromium Emissions -- Kennedy
Release Date: 06/05/2002
- 87 - Application of Wildlife Biomarker Technologies in Remediation Decision-Making -- Hooper
Release Date: 03/06/2002
- 85 - Enhancing Remediation of DNAPL-Contaminated Subsurface Systems -- Miller
Release Date: 01/02/2002
- 83 - Removal of Arsenic from Domestic Drinking Water Supplies -- Farrell
Release Date: 11/07/2001
- 75 - An Advanced Characterization Study of a Chlorinated Solvent Contaminated Aquifer -- Brusseau
Release Date: 03/07/2001
- 74 - In-situ Ozonation of PAHs - Feasibility, Pathways, and Byproduct Identification -- Masten
Release Date: 02/07/2001
- 61 - Developing Methods for the Remediation of Dense Nonaqueous Phase Liquids -- Miller
Release Date: 12/15/1999
- 56 - Electrolytic Strategies for Remediation of Chlorinated Solvents in Groundwater -- Betterton, Arnold
Release Date: 10/06/1999
- 53 - Supercritical Fluid Research is Leading to a Potential New Process for Remediation of PCB-Contaminated Soils and Sediments -- Tavlarides
Release Date: 08/25/1999
- 37 - Promising Developments are Made in the Real-Time Analysis of Combustion Emissions -- Lucas, Koshland
Release Date: 01/13/1999
- 24 - New Oxidative Technology Shows Promise For Treating Organic Chemical Contaminants in Water -- Scrudato
Release Date: 07/08/1998
- 13 - Research Points to Need for Reassessment of PCB Volatility -- Scrudato
Release Date: 02/10/1998
- 11 - Advances Made in Developing Organoclays for Use in Hazardous Waste Remediation -- Phillips, Boyd
Release Date: 01/07/1998