A5064729668- Toxic Organic Pollutants Impact
- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Thermochemical Biomass Conversion Processes
- Fire effects on ecosystems
- Industrial Gas Emission Control
- Catalytic Processes in Materials Science
- Fire dynamics and safety research
- Coal and Its By-products
- Mercury impact and mitigation studies
- Vehicle emissions and performance
- Effects and risks of endocrine disrupting chemicals
- Carcinogens and Genotoxicity Assessment
- Combustion and Detonation Processes
- Energetic Materials and Combustion
- Environmental remediation with nanomaterials
- Mass Spectrometry Techniques and Applications
- Catalysis and Oxidation Reactions
- Laser-induced spectroscopy and plasma
- Atmospheric and Environmental Gas Dynamics
- Chemical Looping and Thermochemical Processes
- Recycling and Waste Management Techniques
- Microbial bioremediation and biosurfactants
- Air Quality Monitoring and Forecasting
- Oil Spill Detection and Mitigation
Environmental Protection Agency
2014-2024
Research Triangle Park Foundation
2014-2024
VA Office of Research and Development
2017
Instituto Nacional de Ecología y Cambio Climático
2009
Oak Ridge Institute for Science and Education
2000-2009
Pusan National University
2007
Agricultural Research Service
2006
Zhejiang University
2006
State Key Laboratory of Clean Energy Utilization
2006
Arcadis (United States)
2006
The open burning of waste, whether at individual residences, businesses, or dump sites, is a large source air pollutants. These emissions, however, are not included in many current emission inventories used for chemistry and climate modeling applications. This paper presents the first comprehensive consistent estimates global emissions greenhouse gases, particulate matter, reactive trace toxic compounds from waste burning. Global CO2 relatively small compared to total anthropogenic CO2;...
Emissions from the in situ burning of oil Gulf Mexico after catastrophic failure Deepwater Horizon drilling platform were sampled for polychlorinated dibenzodioxins and dibenzofurans (PCDD/PCDF). A battery-operated instrument package was lofted into plumes 27 surface fires over a period four days via tethered aerostat to determine characterize emissions PCDD/PCDF. single composite sample resulted an emission factor 2.0 ng toxic equivalency (TEQ) per kg carbon burned, or 1.7 TEQ determined by...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSorption of Elemental Mercury by Activated CarbonsS. V. Krishnan, Brian K. Gullett, and Wojciech. JozewiczCite this: Environ. Sci. Technol. 1994, 28, 8, 1506–1512Publication Date (Print):August 1, 1994Publication History Published online1 May 2002Published inissue 1 August 1994https://pubs.acs.org/doi/10.1021/es00057a020https://doi.org/10.1021/es00057a020research-articleACS PublicationsRequest reuse permissionsArticle...
A growing number of epidemiological studies conducted worldwide suggest an increase in the occurrence adverse health effects populations living, working, or going to school near major roadways. study was designed assess traffic emissions impacts on air quality and particle toxicity a heavily traveled highway. In attempt describe complex mixture pollutants atmospheric transport mechanisms affecting pollutant dispersion this near-highway environment, several real-time time-integrated sampling...
Water above 374 °C and 22.1 MPa, becomes supercritical, a special state where organic solubility increases oxidation processes are accelerated. Supercritical water (SCWO) has been previously shown to destroy hazardous substances such as halogenated compounds. Three separate providers of SCWO technology were contracted test the efficacy systems reduce per- poly-fluoroalkyl (PFAS) concentrations from solutions dilute aqueous film-forming foam (AFFF). The findings all three demonstration...
Wildland fire is a major global driver in the exchange of aerosols between terrestrial environments and atmosphere. This commonly quantified using emission factors or mass pollutant emitted per fuel burned. However, for microbes aerosolized by have yet to be determined. Using bacterial cell concentrations collected on unmanned aircraft systems over forest fires Utah, USA, we determine (BEFs) first time. We estimate that 1.39 × 10
Efforts to discern the role of an activated carbon's surface functional groups on adsorption elemental mercury (Hg0) and mercuric chloride demonstrated that chlorine (Cl) impregnation a virgin carbon using dilute solutions hydrogen leads increases (by factor 2-3) in fixed-bed capture these species. A commercially available (DARCO FGD, NORITAmericas Inc. [FGD])was Cl-impregnated (Cl-FGD) [5 lb (2.3 kg) per batch] tested for entrained-flow, short-time-scale Hg0. In entrained flow reactor,...
Past research has suggested that the presence of sulfur (S) in municipal waste combustors (MWCs) can decrease downstream formation chlorinated organic compounds, particularly polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs). Thus, co-firing a MWC with coal, because S species from may reduce PCDD PCDF emissions. Experiments were carried out to test this hypothesis determine role S. A field-sampled fly ash was injected into EPA's pilot-scale reactor, doped hydrogen chloride...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of sulfur dioxide on the formation mechanism polychlorinated dibenzodioxin and dibenzofuran in municipal waste combustorsBrian K. Gullett, Kevin R. Bruce, Laura O. BeachCite this: Environ. Sci. Technol. 1992, 26, 10, 1938–1943Publication Date (Print):October 1, 1992Publication History Published online1 May 2002Published inissue 1 October 1992https://pubs.acs.org/doi/10.1021/es00034a009https://doi.org/10.1021/es00034a009research-articleACS...
Emissions from residential fireplace and woodstove appliances burning fuels available the San Francisco Bay area were sampled for polychlorinated dibenzodioxins dibenzofurans (PCDDs/Fs), biphenyls (PCBs), hexachlorobenzene (HxCBz), particulate matter (PM), polycyclic aromatic hydrocarbons (PAHs), oxygenated PAHs, monosaccharide levoglucosan. Emission factors these pollutants determined, first known characterization of this extent. Common California natural firewoods manufactured artificial...
This work reports on the first known field study determining emission factors for polychlorinated and polybrominated dibenzodioxins/dibenzofurans (P[C/B]DDs/Fs) diphenyl ethers (PBDEs) from open burning of domestic waste. Two waste dump sites in Mexico were sampled using high-volume samplers mounted to a mobile sampling boom. Concurrent measurements CO CO(2) allowed determination via carbon balance method. PCDD/F averaged 823 ng toxic equivalency (TEQ)/kg C(burned) (N = 8, 68% relative...
Aerial- and ground-sampled emissions from three prescribed forest burns in the southeastern U.S. were compared to laboratory open burn tests using biomass same locations. A comprehensive array of emissions, including PM2.5, black carbon (BC), brown (BrC), dioxide (CO2), volatile organic compounds (VOCs), polychlorinated dibenzo-p-dioxins (PCDDs) dibenzofurans (PCDFs) sampled ground-based aerostat-lofted platforms for determination emission factors. The PM2.5 factors ranged 14 47 g/kg...
Abstract The atmosphere contains a diverse reservoir of microbes but the sources and factors contributing to microbial aerosol variability are not well constrained. To advance understanding emissions in wildfire smoke, we used unmanned aircraft systems analyze aerosols above high-intensity forest fires western United States. Our results show that samples smoke contained ~four-fold higher concentrations cells (1.02 ± 0.26 × 105 m−3) compared background air, with 78% inferred be viable....
An extensive investigation was conducted to understand polychlorinated dibenzo-p-dioxin and furan (PCDD/F) formation mechanisms their relationship with other organic compounds. PCDD/F, chlorophenols (ClPhs), chlorobenzenes (ClBzs), polyaromatic hydrocarbons (PAHs), naphthalenes (PCNs) were analyzed in the boiler exit gases of a field-scale municipal solid waste incinerator under various operating conditions. The TEQ value concentration target compounds changed Low mass PAHs 246-triClPh...