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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...

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 quick overview of the implications of two rules (1. recent final rule for primary PM2.5, and 2. the final PA (policy assessment) for secondary NOxSOxPM ) on total atmospheric deposition of N and S. The is given to the USFS critical loads group as part of their monthly s...

A fire whirl technique was tested for its ability to improve the combustion efficiency of in situ oil burns at sea. The oil burns on water tests were conducted at Texas A&M Engineering Extension Service’s (TEEX) Brayton Fire Training facility located in College Station, Texas. Em...

Chemical concentration versus time (CvT) data is commonly used to characterize the toxicokinetic (TK) properties of chemical substances. However, obtaining in vivo CvT data requires scientific labor and use of animal subjects. To reduce or eliminate new animal testing, it remains...

EPA announced the availability of the final report, <em>Integrated Science Assessment ISA for Lead Pb</em>. This document represents a concise synthesis and evaluation of the most policy-relevant science and will provide the scientific basis for EPA’s review of the National Ambie...

In recent years, the emission of particles and gaseous pollutants from 3D printing has attracted much attention due to potential health risks. This study investigated the generation of environmentally persistent free radicals (EPFRs, organic free radicals stabilized on or inside ...

Collocation of air quality sensors at existing regulatory air monitoring sites allows sensor data comparison against quality-assured reference data and is a cost-effective method for understanding the performance of lower-cost air sensors. In some cases, collocations can allow fo...

Solutions-driven research is a transdisciplinary approach that incorporates diverse forms of expertise to identify solutions to stakeholder-identified environmental problems. This qualitative evaluation of early solutions-driven research projects provides transferable recommendat...

Air pollution remains an important contributor to adverse health outcomes in the U.S. Currently, 121 million people, or one third of the U.S. population, live where National Ambient Air Quality Standards are violated.&lt;span style='mso-element:field-begin'&gt; ADDIN EN.CITE &lt;...

Differentiated primary human bronchial epithelial cell (dpHBEC) cultures grown&nbsp;under air-liquid interface (ALI) conditions exhibit key features of the human&nbsp;respiratory tract and are thus critical for respiratory research as well as efficacy&nbsp;and toxicity testing of...

Abstract for invited SOT 2024 session &quot;Practical applications of machine learning for gaining mechanistic insights in toxicology&quot; Monitoring of chemical occurrence in various environmental media is gold-standard information for characterizing the mechanisms by which hum...

Per- and polyfluoroalkyl substances (PFAS) consist of &gt;4,000 man-made compounds. Due to their water-repellant and non-stick properties, PFAS are used as coatings on cookware, outdoor apparel, textiles, and in personal care products. Some PFAS are associated with negative healt...

Atmospheric water harvesting can provide a high-quality water source for potable or non-potable applications.  However, like other water sources, collected condensate must be managed appropriately to prevent microbial growth.  Of particular concern are opportunistic pathogens suc...

Atmospheric nitrate is a key atmosphere component with implications for air quality, nutrient deposition, and climate.&nbsp; However, accurately representing atmospheric nitrate concentrations within atmospheric chemistry models is a persistent challenge.&nbsp; A contributing fac...

The use of air sensors continues to grow for a variety of air monitoring applications. However, the data quality still remains highly variable. In 2021, the U.S. EPA published reports outlining recommended testing protocols to evaluate the performance of ozone air sensors for non...

Industrial and waste management facilities can emit air pollutants and odorous compounds from fugitive leaks, process malfunctions, and area sources that are difficult to predict, quantify, and manage. These sources can produce a range of environmental and life quality impacts an...

The fugitive emissions of volatile organic compounds (VOCs) from industrial processes are currently managed through in-person leak detection and repair (LDAR) efforts that are costly and occur periodically. These emissions are not rigorously accounted for in current emissions inv...

This is a public presentation on the potential effects of nutrients in smoke on downwind cyanobacteria blooms. Wildfire activity is increasing in the continental U.S. and can be linked to climate change effects, including rising temperatures and more frequent drought conditions. ...

The presentation reviews technologies using infrared and mass spectrometry. The lack of online techniques that are suitable for PFAS monitoring is shown to indicate that more research is needed in this area.

This presentation will be given at Air &amp; Waste Management Association's The Science of PFAS Conference. It provides a general overview of Other Test Method 50, a recently released method for analyzing volatile fluorinated compounds from sources. The method's applicability, sa...

The use of air sensors continues to grow for a variety of air monitoring applications. However, the data quality still remains highly variable. In 2021, the U.S. EPA published reports outlining recommended testing protocols to evaluate the performance of fine particulate matter a...

Members of the Puente Jobos community in Puerto Rico shared with EPA concerns they have about particulate&nbsp;matter in their community and whether the location of the regulatory air monitoring site represents the community's&nbsp;exposure. EPA developed a research study design ...

Members of the Puente Jobos community in Puerto Rico shared with EPA concerns they have about&nbsp;particulate matter in their community and whether the location of the regulatory air monitoring site&nbsp;represents the community's exposure. EPA developed a research study design ...

Members of the Puente Jobos community in Puerto Rico shared with EPA concerns they have about particulate matter in their community and whether the location of the regulatory air monitoring site represents the community's exposure. EPA developed a research study design that invol...