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Showing 1 to 20 of 40 for “"source apportionment"”.
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The Source Apportionment of PM=10 in South Chicago
Made available in DSpace on 2017-07-06T18:59:30Z (GMT). No. of bitstreams: 3 Wlaschin_William_J_MS.pdf: 44488679 bytes, checksum: 8fe6555976b987cb10441361c59a8518 (MD5) Wlaschin_William_J_MS_ABS.pdf: 398473 bytes, checksum: 795e07500f43ce639987b1f43f9df941 (MD5) license.txt: 4813 bytes, checksum: …
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Bayesian and Positive Matrix Factorization approaches to pollution source apportionment
… Positive Matrix Factorization (PMF) in pollution source apportionment (PSA) is examined and illustrated. A study of its settings is conducted in order to optimize them in the context of PSA. The use of a priori information in PMF is examined, in the form of target factor profiles and pulling …
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Fine particulate matter source apportionment of the brown haze in Cape Town
"Brown Haze" is a term used to describe a brown-coloured smog found predominantly in the wintertime in the Cape Town region. It occurs. mostly from April to September due to strong) temperature inversions and windless conditions that can occur during these months, which lead to the build-up of …
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EXPLOITING ADVANCED ATMOSPHERIC AEROSOL CHARACTERISATION TO DEVELOP CUTTING-EDGE APPROACHES FOR SOURCE APPORTIONMENT
… systems due to the huge variety of emission sources, size distributions, chemical properties, and transformation processes. Although the characterisation of atmospheric aerosols is still challenging, their study is essential since they have different impacts both at global and local scales. …
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SET-UP OF INNOVATIVE EXPERIMENTAL METODOLOGIES FOR THE ATMOSPHERIC AEROSOL CHARACTERISATION AND SOURCE APPORTIONMENT
… for the atmospheric aerosol characterisation and apportionment. Many issues are still open in aerosol science. Among them, the identification and quantification of PM sources and the separation between natural and anthropogenic contributions were explored in this work. To improve the …
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Characterization, seasonality and source apportionment of fine particulate organic matter at urban an d rural sites
To better understand the sources of organic PM and the effect of secondary organic aerosols (SOA) on PM levels, samples of fine particulate matter were collected outside Durham, NC in the Duke Research Forest as part of the CELTIC study in July 2003. Among compounds analyzed, oxidation products of …
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Pedogenic carbonates in loess formation rates, formation conditions and source apportionment assessed by isotopes and molecular proxies
… stable C isotope composition indicated C3 source vegetation for organic matter (OM) of both loess and rhizoliths, but lipid molecular proxies revealed grass biomass as origin of loess OM, and shrub or tree roots as source of rhizoliths. Moreover, OM in loess adjacent to rhizoliths was …
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Characterization and source apportionment of ambient PM2.5 in Atlanta, Georgia: on-road emission, biomass burning and SOA impact
Characterization and Source Apportionment of Ambient PM2.5 in Atlanta, Georgia: On-Road Emission, Biomass Burning and SOA Impact Bo Yan 260 Pages Directed by Drs. Armistead G. Russell and Mei Zheng Various airborne PM2.5 samples were collected in the metropolitan Atlanta and surrounding areas, …
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Measurement, Characterization, and Source Apportionment of the Major Chemical Components of Fine Particulate Material, Including Semi-Volatile Species
… sampler data in the application of source apportionment was elucidated. Local aerosols are often impacted by short-term pollution episodes that cannot be temporally resolved using integrated samplers. One-h averaged data applied to source apportionment models was shown to increase …
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Characterization, Speciation, and Source Apportionment of Particles inside and from the Exhaust of Public Transit Buses Fueled With Alternative Fuels
… compositions. Factor analysis suggested possible sources of indoor particle levels in public transit bus as motor vehicles, outdoor soil and secondary particle formation. The conclusion is that SEM methodology is a valuable tool for studying the distribution of particulates.</p><p>A part of this …
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Development of novel high-resolution instruments to measure the real-time oxidative potential of ambient particulate matter and their application in source apportionment
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01
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Air Quality in Mexico City: Spatial and Temporal Variations of Particulate Polycyclic Aromatic Hydrocarbons and Source Apportionment of Gasoline-Versus-Diesel Vehicle Emissions
… PAH and AS concentrations, to gain insight into sources of PAHs, and to quantify the relationships between PAHs and other pollutants. We observed that the highest measurements were generally found at sites with dense traffic networks. Also, PAH concentrations varied considerably in space. An …
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ADVANCING METHODS FOR APPORTIONING THE SOURCES OF SEDIMENT IN RIVERS: COMBINING SPECTROSCOPY AND STABLE ISOTOPES WITH BAYESIAN MIXING MODELS
… contributions from various eroding terrestrial sources to fluvial sediment load via a mixing model approach. However, there remain significant shortcomings in sediment fingerprinting practice, specifically relating to difficulties in producing high-temporal resolution apportionment estimates, …
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Nature and origin of black carbon in Ireland
… and meteorological parameters to determine the sources of the particles observed at the monitoring sites. The mean eBC concentrations measured in Killarney and Enniscorthy were higher than those in Dublin during the winter months, while the concentrations in Birr were only marginally lower. The …
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Particle Class Balance for Apportioning Aerosol Mass
… in a short analysis time. To exploit CCSEM as a source apportionment receptor modeling technique, it is important to define the membership of each particle in a well defined particle class. Various clustering methods were examined to obtain possible members of homogeneous particle classes. An …
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Demonstration of Direct-on-filter FTIR to Estimate Silica, Kaolinite, and Calcite Mineral Fraction in Respirable Coal Mine Dust Samples
… be of particular interest in the context of RCMD source apportionment. In this thesis, the DOF FTIR method is used to estimate silica, kaolinite, and calcite mineral fraction in RCMD samples collected in 16 coal mines, and in the laboratory using dust source materials from those same mines. The …
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CMB7 receptor modelling of airborne particulate matter in the Vaal Triangle
… Monitoring (YAM) programme was to do a one year source apportionment study of airborne particulate matter in the Vaal Triangle. The V AM programme was undertaken by Mintek, in South Africa. Three receptor sites were set up, oneea.ch in the Central Business District (CBD) of Vereeniging, …
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