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Records 1 to 25 of 24354

To Burn or Not to Burn: An Empirical Assessment of the Impacts of Wildfires and Prescribed Fires on Trace Element Concentrations in Western US Streams
(JOURNAL) [To be published : Mar 01, 2023]
The use of low-severity prescribed fires has been increasingly promoted to reduce the impacts from high-severity wildfires and maintain ecosystem resilience. However, the effects of prescribed fires on water quality have rarely been evaluated relative to the effects of wildfires....
The Unit Emergy Value (UEV) Library for Characterizing Environmental Support in Life Cycle Assessment
(PRESENTATION) [Presented : Jan 14, 2023]
Life cycle assessment (LCA) has been extensively used to assess the potential environmental impacts of goods and services over their full life cycles.  The traditional environmental impacts in LCA have been focused on impacts of emissions with limited information regarding the im...
Comparing Equilibrium Concentrations of Polychlorinated Biphenyls Based on Passive Sampling and Bioaccumulation in Water Column Deployments
(JOURNAL) [To be published : Feb 01, 2023]
Biomonitoring at contaminated sites undergoing cleanup, including Superfund sites, often uses bioaccumulation of anthropogenic contaminants by field-deployed organisms as a metric of remedial effectiveness. Bioaccumulation studies are unable to assess the equilibrium status of th...
PFAS Issues for POTWs
(PRESENTATION) [Presented : Jan 19, 2023]
PFAS are a class of chemicals that are drawing the attention of researchers and regulators.  This session will provide an overview of PFAS, their health and environmental concerns, including their sources and levels in municipal wastewater.  An overview of U.S. EPA acti...
Overview of Research to Inform Safe, Effective Adoption of Fit-for-Purpose Water Reuse
(PRESENTATION) [Presented : Nov 05, 2022]
Increasing water shortages and aging infrastructure have broadened interest in using alternative source waters for a range of end uses. Developing fit-for-purpose treatment approaches requires consideration of both the proximal risks of reuse-related exposures and the more distal...
X-ray absorption near edge structure spectroscopy reveals phosphate minerals at surface and agronomic sampling depths in agricultural Ultisols saturated with legacy phosphorus
(JOURNAL) [Published : Dec 01, 2022]
Legacy phosphorus (P) soils have received excessive P inputs from historic manure and fertilizer applications and present unique management challenges for protecting water quality as soil P saturation leads to increased soluble P to waterways. We used P K-edge X-ray absorption ne...
Development of a standardized adsorbable organofluorine screening method for wastewaters with detection by combustion ion chromatography
(JOURNAL) [Published : Aug 22, 2022]
This research project was conducted in house by Jody Shoemaker and Jenifer Jones in CESER/WID with guidance from Adrian Hanley and Sarah Burket in OW/OST/EAS/TAS.  This manuscript describes the investigation of adsorbable organofluorine (AOF) with detection by combustion ion chro...
Tidal Flushing Rather Than Non-Point Source Nitrogen Pollution Drives Nutrient Dynamics in A Putatively Eutrophic Estuary
(JOURNAL) [Published : Jan 01, 2023]
The effects of nonpoint source nutrients on estuaries can be difficult to pinpoint, with researchers often using indicator species, monitoring, and models to detect influence and change. Here, we made stable isotope measurements of nitrogen and carbon in sediment, water column pa...
Utilizing Smart Water Networks to Manage Pressure and Flow for Reduction of Water Loss and Pipe Breaks
(PUBLISHED REPORT) [Published : Sep 14, 2022]
The objectives of this research include: •Using smart water network solutions to help water utilities better manage pressures and flows in their water distribution networks to extend the life of the piping network •Developing case studies for at least four water utilities using...
Filters, Do They Really Work - Data From Three Communities With Lead Action Level Exceedances
(PRESENTATION) [Presented : Nov 17, 2022]
The sub-product provides some background on certification of POU and pitcher filters for lead reduction from drinking water. The effectiveness of these filters will be demonstrated through a review of previous work.
Determining Viral Disinfection Efficacy of Hot Water Laundering
(JOURNAL) [Published : Jun 21, 2022]
In response to the SARS-CoV-2 pandemic, a laboratory protocol was developed to test the viral disinfection efficacy of hot water laundering of cloth face coverings, cotton scrubs, and denim pants. The Phi6 virus (bacteriophage) was used as the organism to test disinfection effica...
A high-throughput, automated technique for microplastics detection, quantification, and characterization in surface waters using laser direct infrared spectroscopy
(JOURNAL) [Published : Dec 01, 2022]
A high-throughput approach to detecting, quantifying, and characterizing microplastics (MPs) by shape, size, and polymer type using laser direct infrared (LDIR) spectroscopy in surface water samples is demonstrated. Three urban creeks were sampled for their MP content near Cincin...
Development and Implementation of a Quantitative Hazard, Risk, and Toxicological Evaluation Tool (QHRTET) for Regionally Focused Issues
(PRESENTATION) [Presented : Dec 07, 2022]
Presentation to the New Mexico Produced Water Research Consortium on the development of computational tools tailored to address produced water characterization needs.  It includes background context on the risk and toxicology assessment of produced water, a high-level overvi...
Toxicological Review of Perfluorobutanoic Acid and Related Compound Ammonium Perfluorobutanoic Acid (PFBA) (Interagency Science Consultation Draft, 2020)
(IRIS ASSESSMENT) [Published : Jun 30, 2020]
In August 2021, the draft <em>Toxicological Review of Perfluorobutanoic Acid and Related Compound Ammonium Perfluorobutanoic Acid (PFBA) (Public Comment and External Review Draft)</em> and the draft charge to external peer reviewers were released for a 60-day public review and co...
Assessing Three Field Analyzers for Lead Quantification in Drinking Water
(PRESENTATION) [Presented : Nov 17, 2022]
Commercially available portable lead field analyzers can be used for lead quantification of non-regulatory drinking water samples. While there are currently numerous devices on the market with manufacturer-provided information on their lead quantification performance, there are l...
Thyroid Hormone Action Controls Cell Signaling in the Developing Ventricular Epithelium
(PRESENTATION) [Presented : Mar 24, 2021]
Developmental thyroid hormone (TH) insufficiency is associated with an array of neurodevelopmental disorders in children, although the precise mechanisms of TH action are often unclear. Previously, we characterized that transient developmental hypothyroidism alters cell adhesion,...
Exposure to Inorganic Arsenic in Rice in Brazil: A Human Health Risk Assessment
(JOURNAL) [Published : Dec 08, 2022]
In certain populations, rice is the main source of exposure to inorganic arsenic (iAs), which is associated with cancer and non-cancer effects. Although rice is a staple food in Brazil, there have been few studies about the health risks for the Brazilian population. The objective...
Stability of Per- and Polyfluoroalkyl Substances in Solvents Relevant to Environmental and Toxicological Analysis
(JOURNAL) [Published : Nov 04, 2021]
Per- and polyfluoroalkyl substances (PFASs) are widely used anthropogenic chemicals. For environmental and toxicological analysis, it is important to understand the stability of PFASs, including novel per- and polyfluoroalkyl ether acids (PFEAs), in commonly used solvents. In thi...
Effects of Bioaugmentation on the Removal of MC-LR and Bacterial Community Structure in Biological Sand Filtration for Drinking Water Treatment
(PRESENTATION) [Presented : Dec 08, 2022]
Evaluate the use of biologically active drinking water filters for removal of HABs-related metabolites as measured using toxicity assays
Clean or Replace? Decontamination Framework for Firefighting Equipment and Hangars - Presentation
(PRESENTATION) [Presented : Jun 07, 2022]
Many aqueous film forming foam (AFFF) delivery systems in aircraft hangars and firefighting vehicles may require thorough cleaning to avoid ongoing environmental impacts from residual per- and polyfluoroalkyl substances (PFAS) within those systems. Though replacement AFFF formula...
Promoting phosphorus recovery at livestock facilities in the Great Lakes region: Analysis of incentive policies
(PAPER IN NON-EPA PROCEEDINGS) [Published : Jun 10, 2022]
Intensive farming activities release large amounts of phosphorus into the environment in the form livestock manure, contributing to the eutrophication of waterbodies, and can lead to algal bloom episodes. This work conducts a study on the design and analysis of incentive policies...
Quantifying coastal ecosystem trophic state at a macroscale using a Bayesian analytical framework
(JOURNAL) [Published : Sep 01, 2022]
One of the goals of coastal ecological research is to describe, quantify and predict human effects on coastal ecosystems. Broad cross-systems assessments to classify ecosystem status or condition have been developed, but are not updated frequently, likely because a lot of informa...
NSF/ANSI 53 Certified Water Filter Efficacy in Benton Harbor, Michigan
(PRESENTATION) [Presented : Nov 17, 2022]
The City of Benton Harbor, MI, initially exceeded EPA&rsquo;s Lead and Copper Rule (LCR) lead action level (AL) of 15 ppb in 2018. The system continued to exceed the Pb AL during five additional monitoring periods from 01/2019 to 06/2021, and the 90th percentile decreased to the ...
A Comparative Review of Passive Sampling to Conventional Metrics for Evaluating Sediment Remediation Efficacy
(PRESENTATION) [Presented : Jan 12, 2023]
Background/Objectives: Contaminated sediments are present at 36% of active National Priority List sites in the United States, and remediation of these sediments to reduce human health or ecological risk can be costly and complex. Over the last few decades, passive sampling device...
PFAS Occurrence Modeling, Research, and Treatment Data Analysis and Modeling – An EPA Research Overview
(PRESENTATION) [Presented : Nov 17, 2022]
Within the EPA PFAS Strategic Roadmap, ORD, OW, and other partners are working more closely together than ever before to reach common goals.&nbsp; The overall objective of this session is to share some of the breadth and depth of ongoing work.&nbsp; Descriptions of the six presen...