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  • Organization = [ORD]
  • Record Type = Publications.
Records 26 to 50 of 86337

Microplastics from source to the environment: detection and characterization in urban watersheds
(PRESENTATION) [Presented : Aug 17, 2023]
This Subproduct will be preparing quarterly Fact Sheets, Summaries, Presentations, International updates. These quarterly meetings will be held with representatives of OITA, ORCR, and regional offices to provide updates on new development in Plastics research in terms of manageme...
U.S. EPA International and National Priorities - 2023
(PRESENTATION) [Presented : May 01, 2023]
International Workshop Presentations and Materials: Environmental exposures and public health.  John will be presenting on the broad topic of Environmental priorities and intervention strategies.  The attached presentations will be provided to the international audience...
Exploring CO2(aq) limitation in temperate seagrass species: interspecific variability and biomass dependency
(PRESENTATION) [Presented : Jun 21, 2024]
Seagrasses are often touted for their ability to remove CO2 from the water and sequester it in the sediments as “Blue Carbon”.  Further, seagrasses have been hypothesized to be refugia for calcifying organisms that are sensitive to coastal acidification.  Ho...
Gulf ribbed mussels increase plant growth, primary production, and soil nitrogen cycling potential in salt marshes
(JOURNAL) [Published : May 12, 2022]
Smooth cordgrass Spartina alterniflora and Atlantic ribbed mussels Geukensia demissa have a mutualism whereby S. alterniflora provides substrate and shade for G. demissa while G. demissa enhances S. alterniflora growth a...
Integrative Monitoring Strategy for Marine and Freshwater Harmful Algal Blooms and Toxins Across the Freshwater-to-Marine Continuum
(JOURNAL) [Published : May 01, 2023]
Many coastal states throughout the USA have observed negative effects in marine and estuarine environments caused by cyanotoxins produced in inland waterbodies that were transported downstream or produced in the estuaries. Estuaries and other downstream receiving waters now face ...
A multi-tiered approach to assess fecal pollution in an urban watershed: Bacterial and viral indicators and sediment microbial communities
(JOURNAL) [To be published : Oct 01, 2024]
Development of effective pollution mitigation strategies require an understanding of the pollution sources and factors influencing fecal pollution loading. Fecal contamination of Turkey Creek in Gulfport, Mississippi, one of the nation's most endangered creeks, was studied throug...
Distribution of Cyanobacteria and Microcystin in Lakes of the U.S. Driven by Combination of Lake, Watershed, and Climate Characteristics
(PRESENTATION) [Presented : Jun 07, 2024]
With increasing concerns about freshwater cyanobacteria blooms, there is a need to identify which waterbodies are at risk for developing these blooms, especially those that produce cyanotoxins. To address this concern, we developed spatial statistical models using the US National...
Supercritical Water Oxidation for Aqueous Phase Treatment of Concentrated PFAS Aqueous Foam Forming Fluid
(PRESENTATION) [Presented : Mar 30, 2023]
Supercritical Water Oxidation (SCWO) process for hazardous waste destruction uses the temperature and pressure of water above the critical point (374 oC, and 22.1 MPa) to degrade hazardous organic pollutants into CO2, water, SO2, and other benign compounds. Using SCWO technology ...
Economic Impacts of Brownfields Cleanup and Redevelopment in Fulton County, GA
(PRESENTATION) [Presented : Apr 09, 2024]
This study assessed the impact of brownfield sites, categorized by cleanup and redevelopment status, on nearby property values in Fulton County GA.  Data on location and status of brownfield sites were obtained from EPA’s Assessment, Cleanup and Redevelopment Exchange ...
Quantifying Error Introduced by Spatiotemporal Mismatches in Satellite and In-Situ Data Acquisition in Ocean Color Algorithm Development.
(PRESENTATION) [Presented : Jun 07, 2024]
In-situ measurements of optically active indicators of water quality are used to develop and validate spatiotemporally robust and cost-effective satellite remote sensing algorithms. Outputs from water quality algorithms routinely inform policymaker decisions that impact environme...
Calibration using R-programming and parallel processing at the HUC12 subbasin scale in the Mid-Atlantic region: Development of national SWAT hydrologic calibration
(JOURNAL) [Published : May 31, 2024]
The first phase of a national scale Soil and Water Assessment Tool (SWAT) model calibration effort at the HUC12 (Hydrologic Unit Code 12) watershed scale was demonstrated over the Mid-Atlantic Region (R02), consisting of 3036 HUC12 subbasins. An R-programming based tool was devel...
Analysis of Legacy and Novel Neutral Per- and Polyfluoroalkyl Substances in Soils from an Industrial Manufacturing Facility
(JOURNAL) [Published : Jun 18, 2024]
Per- and polyfluoroalkyl substances (PFASs) have been detected in an array of environmental media due to their ubiquitous use in industrial and consumer products as well as potential release from fluorochemical manufacturing facilities. During their manufacture, many fluorotelome...
Distribution of Antibiotic Resistance in a Mixed-Use Watershed and the Impact of Wastewater Treatment Plants on Antibiotic Resistance in Surface Water
(JOURNAL) [Published : Nov 02, 2023]
The aquatic environment has been recognized as a source of antibiotic resistance (AR) that factors into the One Health approach to combat AR. To provide much needed data on AR in the environment, a comprehensive survey of antibiotic-resistant bacteria (ARB), antibiotic resistance...
A Faster, Greener Approach to Thyroid Hormone Analysis in Brain
(PRESENTATION) [Presented : Jun 26, 2024]
Thyroid hormones (TH) are important to numerous bodily functions such as development and homeostasis and can be useful bellwethers for identifying biologically disruptive compounds. Research into the effects of environmental pollutants such as pesticides and other endocrine disru...
Mining, refining, and QSAR analysing the nanoinformatics in EPA NaKnowBase
(JOURNAL) [Published : Apr 17, 2024]
Concerns about the safety of manufacturing and using engineered nanomaterials (ENMs) have been increasing as the technology continues to expand. Efforts have been underway to investigate the potentially harmful effects of ENMs without carrying out the challenging empirical studie...
Patterns in phytoplankton and benthic production on the shallow continental shelf in the northeastern Gulf of Mexico
(JOURNAL) [Published : May 15, 2019]
Shallow continental shelves support productive pelagic and benthic communities. This study examined primary productivity at a shallow shelf region in the northeastern Gulf of Mexico focusing on the effect of light on water column and benthic productivity at water depths between 1...
Small Drinking Water Systems Research and Outreach
(PRESENTATION) [Presented : Oct 29, 2014]
This webinar was presented as part of the EPA-ORD Water Research webinar series on October 29, 2014. Dr. Tom Speth and Dr. Darren Lytle provided an overview of EPA’s small-system’s research and outreach efforts to communities, including topics like harmful algal blooms treatment,...
Nitrogen Cycling Genes and Biogeochemistry of Three Small Eutrophic Lakes
(PRESENTATION) [Presented : Jun 24, 2019]
Our previous work has shown that the Jackson Lakes, in the Bayou Chico Watershed in NW FL, USA, are biogeochemically different and have different microbial communities, despite their proximity and common origin. All three lakes are polymictic, but the NE lake is fully freshwater,...
Analysis of microcystins in alum water treatment sludges: holding times, temperatures, linearity of response, and sensitivity to pre-coagulation cell titers
(JOURNAL) [Published : May 09, 2024]
The ELISA assay is a potential tool to screen for dissolved or cell bound microcystins in drinking water treatment plant sludges.  In order to evaluate this potential more thoroughly, a series of experiments were performed to: (1) evaluate the impacts of storage times and te...
Impact of water quality and operational factors on microcystin removal by powdered activated carbon
(JOURNAL) [Published : May 31, 2024]
A financially and technically accessible method for screening powdered activated carbons for control of HAB toxins in water treatment.
Using genus-level taxonomy and traits for efficient ecological assessments of diatom condition.
(PRESENTATION) [Presented : Jun 06, 2024]
Develop genus level, trait based multimetric diatom index (MMI) to assess ecological condition of rivers/streams across U.S. Compliment NRSA Macroinvertebrate/Fish MMIs.
Differential transcriptomic alterations in nasal versus lung tissue of acrolein-exposed rats
(JOURNAL) [Published : Nov 27, 2023]
Introduction: Acrolein is a significant component of anthropogenic and wildfire emissions, as well as cigarette smoke. Although acrolein primarily deposits in the upper respiratory tract upon inhalation, patterns of site-specific injury in nasal versus pulmonary tissues are not w...
Prescribed Fires, Smoke Exposure, and Hospital Utilization Among Heart Failure Patients
(JOURNAL) [Published : Dec 13, 2023]
Background: Prescribed fires often have ecological benefits, but their environmental health risks have been infrequently studied. We investigated associations between residing near a prescribed fire, wildfire smoke exposure, and heart failure (HF) patients' hospital utilizat...
Progress toward developing DNA-based diatom indicators for stream monitoring in the United States: watershed to national scale efforts
(PRESENTATION) [Presented : Jun 06, 2024]
Benthic diatoms are highly responsive to changes in environmental conditions associated with human activities. Their changes in assemblage structure can be used to develop stressor-response relationships, metrics, and indices that can help identify effects of pollution and inform...
A workflow for the detection of Vibrio spp. in a tropical estuarine environment via enrichment dependent high throughput sequencing and qPCR methods
(PRESENTATION) [Presented : Jun 17, 2024]
Identification of potential pathogens that present risks to human health in recreational waters is necessary to advance in-depth water quality assessments. Despite the application of PCR techniques for environmental pathogen detection, only limited information is usually availabl...