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This work investigated the suitability of three non-hazardous food dyes as PFAS simulants during wastewater treatment with powdered activated carbon (PAC). Data from batch experiments with PAC revealed equilibrium constants (Log Kd) and pseudo first-order adsorption rate constant...

Permafrost soils store &sim;50% of terrestrial C, with Yedoma permafrost containing &sim;25% of the total C. Permafrost is undergoing degradation due to thawing, with potentially hazardous effects on landscape stability and water resources. Complicating ongoing efforts to project...

Background and Purpose Biosolids are treated sewage sludge produced as a byproduct of the wastewater treatment process, often applied to land or disposed of in landfills. Under the Clean Water Act, the US EPA Office of Water (OW) has the responsibility to protect human health and...

Modeling large-scale hydrological impacts brought about by site-level green and gray stormwater remediation actions is difficult because urbanized areas are extremely complex dynamic landscapes that include engineered features that, by design, expedite urban runoff to streams, ri...

Presentation to Southwest Ohio Water Environment Association Industrial Waste Seminar.&nbsp; Overview of the Renewable Fuel Standard and its relation to wastewater utility biogas production.

Whole Effluent Toxicity (WET) test methods for measuring the toxicity of effluents and receiving waters are found in 40 CFR Part 136. Short-term chronic freshwater toxicity test methods include the use of three species &ndash; a cladoceran (Ceriodaphnia. dubia), the fathead minno...

The purpose of the study on health effects and toxicity is to develop data, methods, and tools to advance the understanding of adverse health impacts among people, other animals and plants that are associated with exposure to harmful algal blooms (HABs) from both planktonic and b...

Presentation that outlines the process for developing a research plan for a BILS funded research project that is designed to develop validatable methods for detection and quanitation of emerging and historically important pathogens in raw and treated wastewater.

Presentation outlining prospective dissertation research on the Fate and Transport of wastewater linked contaminants. Research investigates the environmental, spatial, temporal, and laboratory methodological trends in monitoring wastewater impacts to surface water.

The purpose of this lecture is to provide a summary of the EPA's research activities with regards to waterborne protozoa with specific emphasis on methods development to detect Cryptosporidium Giardia, and Toxoplasma gondii.

Wastewater is a source for many contaminants of emerging concern (CECs) and surface waters receiving wastewater discharge often serve as source water for downstream drinking water treatment plants. Non-targeted analysis and suspect screening methods were used to characterize chem...

An analysis was conducted of the Chicago metropolitan region using the following integrated metrics: Fisher Information, Green Net Metropolitan Product, Net Energy, Ecological Footprint, Human Well Being Index, and Emergy. Data were aggregated as they were available, over a multi...

This is a presentation to Oregon State University's Water Resources Engineering Department on the spmodel R package.

Under a warmer future climate, thermal refuges could facilitate the persistence of species relying on cold-water habitat. Often these refuges are small and easily missed or smoothed out by averaging in models. Thermal infrared (TIR) imagery can provide empirical water surface tem...

It is becoming a necessity to provide resource constrained small public water utilities with diverse, cost-effective, low-technology and sustainable alternatives for removing arsenic and other contaminant clusters in order to provide safe drinking water.Chitosan-coated Diatomaceo...

Climate-related changes to drought, fire, and insect outbreak regimes have raised concerns that western United States forests, once disturbed, may not return or reattain prior structure and composition.&nbsp; Many post-fire recruitment studies have documented absence or low densi...

Human and ecological health have been threatened by the increase of cyanobacteria harmful algal blooms (cyanoHABs) in freshwater systems. Successful mitigation of this risk requires understanding the factors driving cyanoHABs at a broad scale. To inform management priorities and ...

In the US, there are 80,000 transient non-community (TNC) public water systems. These are small water systems that have at least 15 service connections or serve on average at least 25 people for at least 60 days. This water supply can be found at gas stations, campgrounds or rest...

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...

With the declining tailpipe emissions from the US and worldwide motor vehicle fleet, impacts of tire and brake wear are an increasingly important area of interest.&nbsp; Recent research has shown the compound 6PPD used in tires as an anti-degradation chemical reacts with ozone to...

This is a presentation to students at UC to familiarize them with the basics of EPA's Stormwater Management Model. I will give one presentation over two days. One day we will just do demonstrations of SWMM without any slides and the second day we will take a deep dive into SWMM a...

Background/Objectives. Targeted chemical analyses, non-targeted analyses, and bioanalytical tools each provide a unique but incomplete understanding of the chemicals in a sample.  The US Environmental Protection Agency and US Geological Survey are collaborating to examine the sou...

Previously, we showed that prophylactic addition of glucose to Harsha Lake water samples could inhibit cyanobacteria growth, at least for a short period of time. The current study tested cyanobacterial control with glucose for the entire Harsha Lake bloom season. Water samples (1...

The EPA’s Office of Research and Development constructed a permeable pavement demonstration site at the Edison Environmental Center, NJ in 2009. Infiltration testing of three original permeable parking rows from December 2009 through August 2012 indicated that clogging occurred f...

The normal probability density function (PDF) is widely used in parameter estimation in the modeling of dynamic systems. The values of random variables that obey the normal PDF are distributed at assumed infinite intervals. However, in practice, these random variables are usually...