Health Research Products in the Science Inventory
Records 1 to
25
of 1950
Peer Review for EPA’s Biologically Based Dose-Response (BBDR) Model for Perchlorate (CRITERIA DOCUMENT)
EPA is developing a regulation for perchlorate in drinking water. As part the regulatory process EPA must develop a Maximum Contaminant Level Goal (MCLG). FDA and EPA scientists developed a biologically based dose-response (BBDR) model to assist in deriving the MCLG. This mode...
Holistic blue water use and life cycle cost savings of domestic and agricultural rainwater harvesting at the watershed scale in the Southeast US (PRESENTATION)
According to the U.S. Global Change Research Program, from 1970 to 2007 most of the Southeast U.S. received heavy downpours in recent autumns while moderate-to-severe drought increased in spring and summer (12% and 14%). Rainwater harvesting (RWH) is getting attention due to rece...
Sustainability analysis and life-cycle ecological impacts of rainwater harvesting systems using holistic analysis and a modified eco-efficiency framework (PRESENTATION)
Background/Question/Methods A sustainability paradigm is being recognized globally as a path forward for human prosperity and ecological health in the face of climate change and meeting challenges of the water-energy-food nexus. Rainfall shortages for drinking water and crop pro...
Removal of Strontium by Ion Exchange and Lime Softening (PRESENTATION)
Presentation to be given at the AWWA International Symposium on Inorganics, Detroit, MI.
An Ultra-Sensitive Method for the Analysis of Perfluorinated Alkyl Acids in Drinking Water using a Column Switching High-Performance Liquid Chromatography Tandem Mass Spectrometry (JOURNAL)
In epidemiological research, it has become increasingly important to assess subjects' exposure to different classes of chemicals in multiple environmental media. It is a common practice to aliquot limited volumes of samples into smaller quantities for specific trace level chemi...
Efforts to estimate pesticide degradation rates in subsurface vadose and aquifer materials (PRESENTATION)
When pesticides are used in real-world settings, the objective is to be effective in pest eradication at the site of application, but also it is desired that the pesticide have minimal persistence and mobility as it migrates away from the application site. At the site of applicat...
Holistic impact assessment and cost savings of rainwater harvesting at the watershed scale (JOURNAL)
We evaluated the impacts of domestic and agricultural rainwater harvesting (RWH) systems in three watersheds within the Albemarle-Pamlico river basin (southeastern U.S.) using life cycle assessment (LCA) and life cycle cost assessment. Life cycle impact assessment (LCIA) categori...
Uptake of Nickel by Synthetic Mackinawite (JOURNAL)
The uptake of aqueous Ni(II) by synthetic mackinawite (FeS) was examined in anaerobic batch experiments at near-neutral pH (5.2 to 8.4). Initial molar ratios of Ni(II) to FeS ranged from 0.008 to 0.83 and maximum Ni concentrations in mackinawite, expressed as the cation mol fract...
Development of LC/MS/MS Methods for Implementation in US EPA’s Drinking Water Unregulated Contaminant Monitoring Regulations (PRESENTATION)
Well-characterized and standardized methods are the foundation upon which monitoring of regulated and unregulated contaminants in drinking water are based. To obtain reliable, high quality data for trace analysis of contaminants, these methods must be rugged, selective and sensit...
Removal of Inorganic Contaminants of Concern: Strontium and Nitrate (PRESENTATION)
The objectives of this presentation are to present a brief overview of full scale demonstration studies on ion exchange and lime softening treatment for ground water systems.
Ground Water Technical Support Center (GWTSC) Annual Report Fiscal Year 2015 (SUMMARY)
The Ground Water Technical Support Center (GWTSC) is part of the Ground Water and Ecosystems Restoration Division (GWERD), which is based in the Robert S. Kerr Environmental Research Center in Ada, Oklahoma. The GWERD is a research division of U.S. EPA’s National Risk Management ...
Pilot-Scale Demonstration of In-Situ Chemical Oxidation Involving Chlorinated Volatile Organic Compounds - Design and Deployment Guidelines (Parris Island, SC, U.S. Marine Corp Recruit Depot, Site 45 Pilot Study) (PUBLISHED REPORT)
A pilot-scale in situ chemical oxidation (ISCO) demonstration, involving subsurface injections of sodium permanganate (NaMnO4), was performed at the US Marine Corp Recruit Depot (MCRD), site 45 (Parris Island (PI), SC). The ground water was originally contaminated with perchloroe...
Per- and Polyfluoroalkyl Substances (PFAS): Sampling Studies and Methods Development for Water and Other Environmental Media (COMMUNICATION PRODUCT)
Per- and polyfluoroalkyl substances (PFAS) are a large group of manufactured compounds used in a variety of industries, such as aerospace, automotive, textiles, and electronics, and are used in some food packaging and firefighting materials. For example, they may be used to make ...
Evaluating Potential Exposures to Ecological Receptors Due to Transport of Hydrophobic Organic Contaminants in Subsurface Systems (Final Report) (ASSESSMENT DOCUMENT)
EPA's Ecological Risk Assessment Support Center (ERASC) announced the release of the final report, <i>Evaluating Potential Exposures to Ecological Receptors Due to Transport of Hydrophobic Organic Contaminants in Subsurface Systems</i>. This technical paper recommends several ty...
Examining the impacts of increased corn production on groundwater quality using a coupled modeling system (JOURNAL)
This study demonstrates the value of a coupled chemical transport modeling system for investigating groundwater nitrate contamination responses associated with nitrogen (N) fertilizer application and increased corn production. The coupled Community Multiscale Air Quality Bidirect...
EPA Technical Support Centers (TSC): FY14 Lessons Learned (SUMMARY)
EPA’s Technical Support Centers (TSC) included in ORD’s Safe and Healthy Communities (SHC) Research Action Plan fill the need for supplying subject-matter experts to continually assess state-of-the-art research and practices and channel this information to users in both direct ap...
Technical Support for Contaminated Sites (PRESENTATION)
In 1987, the U.S. Environmental Protection Agency’s (EPA) Office of Research and Development (ORD), Office of Land and Emergency Management, and EPA Regional waste management offices established the Technical Support Project. The creation of the Technical Support Project enabled...
Release and toxicity comparison between industrial- and sunscreen-derived nano-ZnO particles (JOURNAL)
Many consumer products containing ZnO have raised concern for safety in regards toenvironmental impact and the public health. Widely used sunscreens for protectingagainst UV and avoiding sunburns represent a great exposure to nano-ZnO, one of theingredients commonly applied in su...
Role of solution chemistry in the retention and release of graphene oxide nanomaterials in uncoated and iron oxide-coated sand (JOURNAL)
Upon increasing production and use of graphene oxide nanoparticles (GONPs), concerns agitate over their potential impacts and risks to the environment, ecosystem, and human health. An improved understanding of the fate and transport including remobilization of GONPs in the subsur...
Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature (JOURNAL)
This review focus on environmental implications and applications of engineered magnetite (Fe3O4) nanoparticles (MNPs) as a single phase or a component of a hybrid nanocomposite that take advantages of their superparamagnetism and high surface area. MNPs are synthesized via co-pre...
Effects of titanium dioxide nanoparticles derived from consumer products on the marine diatom Thalassiosira pseudonana (JOURNAL)
Increased manufacture of TiO2 nano-products has caused concern about the potential toxicity of these products to the environment and in public health. Identification and confirmation of the presence of TiO2 nanoparticles derived from consumer products as opposed to industrial TiO...
Potential Aquifer Vulnerability in Regions Down-Gradient from Uranium In Situ Recovery (ISR) Sites (JOURNAL)
Sandstone-hosted roll-front uranium ore deposits originate when U(VI) dissolved in groundwater is reduced and precipitated as insoluble U(IV) minerals. Groundwater redox geochemistry, aqueous complexation, and solute migration are instrumental in leaching uranium from source rock...
Evidence of sulfate-dependent anaerobic methane oxidation within an area impacted by coalbed methane-related gas migration (JOURNAL)
The rapid development of unconventional gas resources has been accompanied by an increase in public awareness regarding the potential effects of drilling operations on drinking water sources. Incidents have been reported involving blowouts (e.g., Converse County, WY; Lawrence Tow...
Journal: Efficient Hydrologic Tracer-Test Design for Tracer-Mass Estimation and Sample Collection Frequency, 1 Method Development (JOURNAL)
Hydrological tracer testing is the most reliable diagnostic technique available for the determination of basic hydraulic and geometric parameters necessary for establishing operative solute-transport processes. Tracer-test design can be difficult because of a lack of prior knowl...
Journal: A Review of Some Tracer-Test Design Equations for Tracer-Mass Estimation and Sample Collection Frequency (JOURNAL)
Determination of necessary tracer mass, initial sample-collection time, and subsequent sample-collection frequency are the three most difficult aspects to estimate for a proposed tracer test prior to conducting the tracer test. To facilitate tracer-mass estimation, 33 mass-estima...