Superfund Research Program
- 307 - Clay Layers May Worsen Arsenic Contamination -- van Geen
Release Date: 07/08/2020
Layers of clay are widely thought to protect groundwater aquifers from above-ground contaminants. But according to a new NIEHS Superfund Research Program (SRP) study, these clay layers may play a role in increasing groundwater arsenic contamination.
- 291 - Passive Samplers Tackle PCB Flux -- Hornbuckle
Release Date: 03/06/2019
Researchers from the University of Iowa Superfund Research Program (SRP) Center have developed a method to measure the movement, or flux, of polychlorinated biphenyls (PCBs) from water to air using passive sampling devices.
- 285 - Why Shallow Lake Food Webs May Have More Arsenic -- Neumann
Release Date: 09/05/2018
Lake properties impact the amount of arsenic that transfers from sediments into the aquatic food web, according to a new SRP study. Researchers discovered high concentrations of arsenic in the water and plankton of well-mixed shallow lakes.
- 282 - Dust from Mine Waste in Navajo Nation May Harm Lungs and Heart -- Campen
Release Date: 06/06/2018
Particles in dust from abandoned uranium mines may be damaging to the lungs and heart, according to new research from the University of New Mexico Superfund Research Program (UNM SRP) Center. The researchers showed that exposure to particles less than 10 micrometers in diameter (PM10) from an old uranium mine, compared to PM10 from an area not impacted by a mine, led to increased pulmonary and cardiac toxicity in mice, as well as higher levels of inflammation and oxidative stress in cells.
- 261 - Importance of Young Dissolved Organic Carbon to the Release of Arsenic in Aquifers -- Bostick
Release Date: 09/07/2016
Carbon from relatively new sources of organic material on the surface, or young carbon, can stimulate microbial communities deep in aquifers, leading to the release of arsenic into water, according to a recent field study by Columbia University Superfund Research Program (SRP) Center researchers. The researchers found that near-surface sources of organic carbon are central in microbial metabolism, even in aquifers that are far below and separated from the land where carbon is derived.
- 257 - Using Field Data and Numerical Modeling to Assess Vapor Intrusion Risk -- Pennell
Release Date: 05/04/2016
A recent Superfund Research Program (SRP) study reveals that measurements of chemical concentrations in groundwater may not be a good indicator of whether the chemicals are seeping into buildings and contaminating indoor air. The findings provide insight into how an approach incorporating multiple lines of evidence, including soil gas measurements and a 3-D model, can be used to better evaluate exposure risks from vapor intrusion into homes and buildings.
- 246 - River Algae Affects Mercury Pollution at Superfund Site -- Chen
Release Date: 06/03/2015
A new study has shown that periphyton -- a community of algae, bacteria, and other natural material living on submerged surfaces -- is helping to transform mercury from a Superfund site into methylmercury, a more toxic form. The study, led by Dartmouth College Superfund Research Program (SRP) researchers, also found lower than anticipated levels of methylmercury in small fish located downstream from a former chemical plant, despite elevated levels of methylmercury in sediment, water, and periphyton.
- 245 - Using Lead Isotopes to Identify Sources of Metal and Metalloid Contaminants -- Betterton
Release Date: 05/06/2015
By sampling wind-blown dust and aerosol, researchers from the University of Arizona Superfund Research Program (UA SRP) have measured airborne metal and metalloid contaminant dispersion patterns from mining operations. While using an existing technique in a new way, the UA SRP researchers measured the extent of soil contamination near a mine and smelter while verifying the use of lead isotope analysis to identify contaminant sources.
- 238 - Measuring Vapor Intrusion to Estimate Underground Contamination -- Suuberg
Release Date: 10/01/2014
Scientists from the Brown University Superfund Research Program (Brown SRP) have taken a step toward providing a simpler, accurate screening method to determine whether chemicals in underground sources are seeping into buildings and contaminating indoor air. Led by Eric Suuberg, Sc.D., P.E., the researchers developed process models, basically numerical equations, to predict the concentrations of vapors that enter indoor environments. Published in a series of three papers, results from the process models were consistent with advanced computer modeling techniques.
- 236 - Developments toward Low-Cost, Unattended Vapor Intrusion Monitoring -- Patel
Release Date: 08/06/2014
NIEHS Superfund Research Program (SRP)-funded scientists from the chemical sensor company Seacoast Science are developing an inexpensive vapor intrusion monitoring system. The system can operate repeatedly without user intervention and detect typical vapor intrusion chemicals at low detection limits, allowing many more sites to be monitored over longer periods.
- 234 - Gold Nanoparticles Offer a Simple and Inexpensive Way to Detect Mercury -- Koshland
Release Date: 06/04/2014
Researchers led by Catherine Koshland, Ph.D., from the University of California, Berkeley Superfund Research Program (SRP) have developed an inexpensive, easy to use, and highly sensitive sensor to measure how much mercury is in liquid or aqueous samples. The sensor uses a film of gold nanoparticles to measure mercury concentrations down to 1.5 nanograms per liter.
- 227 - Lead Discovered at Higher Levels Below the Soil Surface -- Thompson, Boekelheide
Release Date: 11/06/2013
Measuring lead soil contamination at the surface may miss higher concentrations just below the ground, according to a new study from the Brown University Superfund Research Program (SRP). Researchers analyzed hundreds of soil samples from residential properties around six water tower sites in southern Rhode Island and found that even when lead levels on the surface are low, concentrations can be greater at depths down to a foot.
- 226 - Environmentally Persistent Free Radicals and Their Lifetime in Ambient Fine Particulate Matter -- Dellinger, Gehling
Release Date: 10/21/2013
For the first time, an expansive study into the concentration and extended decay behaviors of environmentally persistent free radicals (EPFRs) in ambient fine particulate matter revealed the ways in which EPFRs decompose in the environment. EPFRs can cause cell damage and induce an inflammatory response which can lead to a wide range of biological damage.
- 219 - Arsenic Uptake in Homegrown Vegetables from Mining-Affected Soils -- Maier, Ramirez-Andreotta
Release Date: 03/06/2013
Arsenic uptake from soil into some plants presents a potential health hazard that may affect home gardeners near contaminated sites. When combining results from a greenhouse and a home garden study, the amount of arsenic accumulated in the edible portion of the plant in certain vegetable families was associated with the arsenic soil concentration.
- 218 - Marine Mercury: From Sources to Seafood -- Chen, Rardin
Release Date: 02/06/2013
Mercury released into the air and then deposited into oceans contaminates seafood commonly eaten by people in the U.S. and globally, according to findings from the Coastal and Marine Mercury Ecosystem Research Collaborative (C-MERC).
- 209 - PAHs Before and After the Deepwater Horizon Oil Spill -- Anderson
Release Date: 05/02/2012
Oregon State University SRP scientists used their novel passive sampling devices to make before-and-after comparisons of polycyclic aromatic hydrocarbons (PAHs) at four sites affected by the Deepwater Horizon oil spill. Their results suggest a continued need for monitoring of residual oil and dissolved PAHs in the Gulf of Mexico.
- 197 - Poplars are Choosy about PCBs -- Schnoor
Release Date: 05/04/2011
Could trees be the world's biggest vacuum cleaners? Scientists study how poplar trees help clean up some polychlorinated biphenyls (PCBs) and reduce the risk of human exposures.
- 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.
- 189 - Use of Spatial and Temporal Analyses to Provide Insights into the Environmental Etiology of Cancer -- Aschengrau, Webster
Release Date: 09/01/2010
Scientists are investigating what individuals in geographic "hot spots" for cancer have in common to reveal possible routes of exposure to environmental carcinogens.
- 179 - Scaling up from Local Deterministic Measurement to a Regional Probabilistic Model -- Young, Sanborn
Release Date: 11/04/2009
- 164 - New Nanomaterials to Capture Mercury Vapor Released from Compact Fluorescent Lamps -- Hurt
Release Date: 08/06/2008
- 146 - Groundwater Contamination by Perchlorate from Brines -- Hunt
Release Date: 02/07/2007
- 136 - Mobilization of Arsenic in Sediments -- Di Toro
Release Date: 04/05/2006
- 128 - Identifying Predictors of Mercury Burdens in Fish -- Folt, Chen
Release Date: 08/02/2005
- 117 - Analysis of PAHs in Air Samples Collected After the WTC Disaster and Estimation of Increase in Lifetime Cancer Risk -- Rappaport
Release Date: 09/01/2004
- 108 - Use of Sediment Core Analyses in Site Characterization -- Bopp
Release Date: 12/03/2003
- 98 - Arsenic Mobilization in Bangladesh Groundwater -- Zheng, van Geen, Stute
Release Date: 02/05/2003
- 89 - Clues to Methylmercury Levels in Freshwater Fish -- Folt
Release Date: 05/01/2002
- 68 - Investigating the Transport of Heavy Metals in a Polluted Aquifer -- Conklin
Release Date: 07/12/2000
- 47 - Investigating the Mass Transfer and Persistence of Nonaqueous Phase Liquids in the Subsurface Environment -- Abriola
Release Date: 06/02/1999
- 43 - Fate and Transport of Metals in the Aberjona River Watershed -- Hemond
Release Date: 04/07/1999
- 32 - Understanding the Physical Processes Involved in Metal Transport in the Upper Mystic Lake -- Nepf
Release Date: 10/28/1998
- 29 - The Persistence of Polychlorinated Biphenyls in Hudson River Sediments -- Chillrud
Release Date: 08/16/1998
- 20 - Use of Space/Time Analysis For Improved Exposure Assessment -- Christakos
Release Date: 05/13/1998
- 18 - Characterization of Contaminants in New York City -- Chillrud, Bopp
Release Date: 04/15/1998