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Showing 1 to 20 of 129 for “"Particulate matter(PM)"”.
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Emission projection and uncertainty analysis of primary particulate matter (PM) from the transportation sector
Item reinstated by Sarah Shreeves (sshreeve@illinois.edu) on 2014-06-28T10:00:24Z Item was in collections: Dissertations and Theses - Civil and Environmental Engineering (ID: 672) Graduate Theses and Dissertations at Illinois (ID: 204) No. of bitstreams: 3 Yan_Fang.pdf: 3383882 bytes, checksum: …
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Assessing the distribution, composition and potential human health implications of metal-bearing particulate matter in the Saldanha Bay Municipality
Air pollution through the emission of particulate matter (PM) can have a significant impact on the surrounding environment. PM2.5 and PM10 is of particular concern as it is known to reduce the quality of air and can cause adverse health effects on surrounding communities. The overarching aim of …
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Street Dust : implications for stormwater and air quality, and management through street sweeping.
… also demonstrated that as much as 85% of ambient particulate matter (PM₁₀), exposure to which is associated with several health effects, can arise from resuspension of accumulated street dust. The objectives of this study were to: (1) Critically review the available literature regarding street …
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Assessment of Ambient Air Particulate Matter in the New Orleans Historic District
Particulate matter in the ambient air of down-town New Orleans, LA, is not currently recorded by any government, state, or private organization. This research quantified particulate matter (PM) and its metal concentration in ambient air of the New Orleans Historic District. Both, PM10 (PM less than …
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Laboratory studies of the multiday oxidative aging of atmospheric organic aerosol
Fine particulate matter (PM, or "aerosol") in the atmosphere affects the Earth's radiative balance and is one of the most important risk factors leading to premature mortality worldwide. Thus, understanding the processes that control the loading and chemical composition of PM in the atmosphere is …
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Characterization of in-use emissions from marine engines
… of nitrogen (NOx), carbon dioxide (CO2), and particulate matter (PM) emissions were measured using on-board emission measurement systems developed at the Engine and Emissions Research Laboratory (EERL), West Virginia University. The NOx emissions were reduced by approximately 11%--17% with …
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Measurement of particulate matter size, concentration and mass emissions from in-use heavy duty vehicles
… advancements lower heavy duty vehicle particulate matter (PM) mass emission rates, there is concern that these improvements are increasing the toxicity of the PM by virtue of a subsequent reduction in particle size. These ultrafine particles are able to better penetrate the alveolar …
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Measuring Change in PM2.5 Emissions as Nextgen Operational Procedures are Implemented at Large U.S. Airports
The aviation industry is a contributing source of particulate matter (PM), a pollutant known to negatively impact human health. The NextGen program has a focus on reducing aviation fuel burn. Since PM is a direct byproduct of jet fuel combustion, this study evaluated whether the operational …
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Spatial trends in surface-based carbonaceous aerosol measurements during DISCOVER-AQ in Houston, TX.
Carbonaceous aerosol (both fine particulate matter (PM₂.₅) and total suspended particulate (TSP)) were collected during NASA's DISCOVER-AQ (Deriving Information on Surface Conditions from Column and Vertically Resolved Observations Relevant to Air Quality) in Houston, TX during September 2013. Four …
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Reduction of natural gas engine emissions using a novel aftertreatment system
… aftertreatment system to reduce gaseous and particulate matter emissions from natural gas fueled vehicles. Specific objectives of this study were to evaluate and characterize emissions from a natural gas fueled vehicle powered by a Cummins C8.3G+ engine with and without the particulate matter …
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Comparison of heavy-duty diesel engine emissions between an on-road route and engine dynamometer simulated on-road cycle
… compounds of oxides of nitrogen (NOx) and particulate matter (PM). As a means of emissions control, engine dynamometer certification is currently employed. Current certification cycles provide for standardized comparisons, but may not be indicative of real-world emissions. Accurate in-use …
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Influence of weekdays, weekends, bandhas and weather conditions on particulate matter (PM10) concentrations in the Kathmandu Valley in Nepal
Particulate matter (PM) exposure has been associated with a variety of adverse health effects. Quantifying the relative source contribution of PM is important as it provides policymakers critical information needed to formulate successful pollution reduction programs. The aim of this study was to …
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Qualitative and quantitative assessment of UCM in PM2.5 of Bakersfield, CA.
Fine particulate matter (PM ₂.₅ ) was collected in Bakersfield, CA during the CalNex 2010 field experiment and was analyzed for primary organics using a gas chromatograph – mass spectrometer (GC-MS). Substantial presence of unresolved complex mixture (UCM) was observed in the collected PM ₂.₅ . To …
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Evaluation of opacity, particulate matter, and carbon monoxide from heavy-duty diesel transient chassis tests
… showed little correlation with filter-captured particulate matter (PM). It was also observed that the snap-acceleration test did not identify PM due to engine load, which is a significant contributor to PM formation. The relation between opacity and carbon monoxide (CO) and PM and CO was also …
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Design and development of a microwave-enhanced diesel soot oxidation system
Diesel particulate matter (PM) emissions have created considerable concern because PM is a suspected carcinogen. Up to this point, improved engine and fuel system design and control schemes have made the use of diesel particulate aftertreatment systems unnecessary for most applications in the …
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Emissions and operational aspects of methanol as an alternative fuel in a stationary gas turbine
… of nitrogen (NOx), total hydrocarbons (HC), and particulate matter (PM). During operation on methanol significant reductions in NOx and HC emissions were observed. Without significant change in turbine inlet temperature, this observation can only be explained by a significant reduction in primary …
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Determination of the effectiveness of a Hot Tube igniter for initiating HCCI combustion
… and dramatically reduced nitrous oxide (NOJ and particulate matter (PM) emissions when compared to current spark ignition (SI) and compression ignition (CI) engine technologies. In its simplest form, HCCI can be described as lean autoignition of a homogeneous fuel/air mixture that occurs without …
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Study of particulate matter formation and evolution in near-field aircraft plumes using a one-dimensional microphysical model
… effort to investigate and characterize the particulate matter (PM) emissions from aircraft engines. This thesis presents a one-dimensional microphysics and chemical kinetics model that is used to study the formation and evolution of particulate matter in near field aircraft plumes at ground …
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The Decay of Aerosol Concentration as a Function of Time Comparing the Effects of AHPCO and Bi-Polar and an Analysis of Aeroallergens, Fungal Spores and Pollen in the Texas Panhandle Area
… air pollution is the aerosols in the form of Particulate Matter (PM), also known as particulate pollution. The most dangerous particulate matters are those which are less than 10 micrometers, because when inhaled, they can reach deep down into our lungs and even into our bloodstreams (U.S …
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