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Emissions from PFAS users and treatment methods pose a threat to human health and the environment. Methods are needed to destroy PFAS by breaking all the strong carbon fluorine bonds. Here an alumina based catalyst developed for the electronics industry to destroy perfluorocarbon...

The Energy Modeling Forum (EMF) 37 study on deep decarbonization and high electrification analyzed a set of scenarios that achieve economy-wide net-zero carbon dioxide (CO2) emissions in North America by mid-century, exploring the implications of different technology evolutions, ...

We examined the impact of dimethylsulfide (DMS) emissions on sulfate concentrations over the continental U.S. by using the Community Multiscale Air Quality (CMAQ) model version 5.4 and performing annual simulations without and with DMS emissions for 2018. DMS emissions enhance su...

This paper describes the results of a four-day&nbsp;next generation emission measurement (NGEM) demonstration study conducted at a midwestern U.S. chemical facility that uses ethylene oxide (EtO), a hazardous air pollutant, in the production of industrial surfactants. The abstrac...

In April of 2018, a two-week measurement campaign was conducted to characterize methane and other gas emissions from 15 unconventional oil and natural gas production sites (well pads targeting shale) operated by Southwestern Energy in Ohio County, West Virginia. The sites were su...

Cookstove emissions are a significant source of indoor air pollution and have been associated with various acute and chronic illnesses in children and adults. Polycyclic aromatic compounds (PACs), ubiquitous environmental contaminants, are associated with exposure to woodsmoke em...

In April of 2018, an optical gas imaging (OGI) and full flow sampler (FFS) emissions measurement study of pneumatic controllers (PCs) at 15 oil and natural gas production sites in West Virginia was conducted. A total of 391 PC systems supporting 66 working wells were found. All w...

Volatile chemical products (VCPs) and other non-combustion-related sources have become important for urban air quality, and bottom-up calculations report emissions of a variety of functionalized compounds that remain understudied and uncertain in emissions estimates. Using a new ...

The volatility distribution of organic emissions from biomass burning and other combustion sources can determine their atmospheric evolution due to partitioning/aging. The gap between measurements and models predicting secondary organic aerosol has been partially attributed to th...

Wildland fires are a major source of gases and aerosols, and the production, dispersion, and transformation of fire emissions have significant ambient air quality impacts and climate interactions. The increase in the wildfire area burned and severity across the US and Canada in r...

Experimental fenceline sensor pods (SPods) fitted with 30 second duration canister grab sampling (CGS) systems were deployed at a site near chemical facilities in Louisville, KY from June 4, 2018, to January 5, 2020. The objective of the study was to better understand lower cost ...

Alfalfa hay that was grown on a field treated with a methyl bromide and chloropicrin pesticide (at a 98/2 weight ratio) resulted in animal sickness, posing a disposal issue for the harvested feed. In consideration of disposal options, emissions and residues from burning treated a...

Several locations across the United States in noncompliance with the national standard for ground-level ozone (O3) are thought to have sizable influences from distant extra-regional emission sources or natural stratospheric O3, which complicate the design of local emission contro...

Although commercial polychlorinated biphenyl (PCB) production was banned in 1979 under the Toxics Substance Control Act, inadvertent generation of PCBs through a variety of chemical production processes continues to contaminate products and waste streams. In this research, a tota...

Startling images of smoke-filled skies have filled the news and social media in recent years during major wildfires in the U.S. (Figure 1). In 2020, over 10 million acres burned from nearly 59,000 wildland fires, including wildfires and prescribed fires (National Interagency Coor...

The COVID-19 pandemic created an extreme natural experiment in which sudden changes in human behavior and economic activity resulted in significant declines in nitrogen oxide (NOx) emissions, immediately after strict lockdowns were imposed. Here we examined the impact of multiple...

The atmosphere contains a diverse reservoir of microbes but the sources contributing to the spatiotemporal variability of microbial assemblages have not been well constrained. To characterize wildland fire smoke as a microbial aerosol point source, we examined high-intensity fore...

Nitrogen oxides (NOx=NO2NO2) play a crucial role in the formation of ozone and secondary inorganic and organic aerosols, thus affecting human health, global radiation budget, and climate. The diurnal and spatial variations in NO2 are functions of emissions, advection, deposition,...

Studies during the past 50 years have characterized the carcinogenicity and mutagenicity of extractable organic material (EOM) of particulate matter (PM) in ambient air and from combustion emissions.&nbsp; We have summarized conclusions from these studies and present data support...

Anthropogenic nitrogen oxide (NOx) and volatile organic compound (VOC) emissions in the U.S. have declined substantially over the last decade, altering the NOx-VOC chemistry and ozone (O3) production characteristics of many areas. In this work we use multiple air quality analysis...

EPA Program, Regional Offices, State, Local, and Tribal organizations have requested information about PFAS air emissions and atmospheric fate and transport to better understand potential human exposures. This product broadly addresses the importance of considering PFAS-related ...

The Lake Michigan Ozone Study 2017 (LMOS 2017) in May and June 2017 enabled study of transport, emissions, and chemical evolution related to ozone air pollution in the Lake Michigan airshed. Two highly instrumented ground sampling sites were part of a wider sampling strategy of a...

Volatile chemical products (VCPs) are a significant source of reactive organic carbon emissions in the United States with a substantial fraction (&gt;20% by mass) serving as secondary organic aerosol (SOA) precursors. Here, we incorporate a new nationwide VCP inventory into the C...

We conduct the first 4D-Var inversion of NH3&nbsp;accounting for NH3&nbsp;bi-directional flux, using CrIS satellite NH3&nbsp;observations over Europe in 2016. We find posterior NH3&nbsp;emissions peak more in springtime than prior emissions at continental to national scales, and ...

Airborne particulate matter (PM) is a pollutant of concern not only because of its adverse effects on human health but also on visibility and the radiative budget of the atmosphere. PM can be considered as a sum of solid/liquid species covering a wide range of particle sizes with...