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You searched for subject:(coastal aerosol). Showing records 1 – 3 of 3 total matches.

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University of Ghana

1. Bempong-Manful, E. Assessment Of Atmospheric Aerosol Content In Abuesi: A Suburban Coastal Community In Ghana .

Degree: 2013, University of Ghana

Airborne particulate matter (APM) composition has been studied at the Abuesi area. Aerosol samples in two size fractions were collected over a period of 3 months using the Gent stacked filter unit (SFU). Energy Dispersive X-ray Fluorescence Spectroscopy (EDXRF) was used to measure concentrations of up to 28 elements at the INFN-Accelerator Laboratory, University of Florence, Italy for the coarse fraction which accounted for 53.84 % of PM10 aerosols in the Abuesi area. Mean values of 41.890 μg/m³, 22.469 μg/m³ and 19.422 μg/m³ were measured for Inhalable Particulate Matter (IPM/PM10), Coarse mode Particulate Matter (CPM) and Fine mode Particulate Matter (FPM) respectively and these were within the World Health Organisation (WHO) guidelines. Chlorine is established as an important component of the aerosol in Abuesi, originating mainly from sea spray. It accounted for 32.13 % of the total coarse mode aerosol elemental concentration. Characterisation of aerosols in the study area was performed using Principal Component Analysis (PCA) with VARIMAX rotation. Six factors score accounted for the three main identified APM sources (i.e. crustal material/soil dust, marine/sea spray and mechanical operations) in the area with crustal material/dust representing the dominant source. Enrichment Factor (EF) values also showed no enrichment for about 86 % of the measured elements with only Na which resulted predominantly from sea spray recording a moderate enrichment score of EF=3.386. The results obtained suggest that ambient air quality in the Abuesi area is safe. There is, however, the need to conduct further studies to estimate the black carbon concentrations of both fine and coarse aerosol fractions and, as well, investigate the elemental source profile of the various APM sources in the study area.

Subjects/Keywords: Atmospheric Aerosol Content; Abuesi; Suburban Coastal Community; Ghana

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Bempong-Manful, E. (2013). Assessment Of Atmospheric Aerosol Content In Abuesi: A Suburban Coastal Community In Ghana . (Masters Thesis). University of Ghana. Retrieved from http://ugspace.ug.edu.gh/handle/123456789/23650

Chicago Manual of Style (16th Edition):

Bempong-Manful, E. “Assessment Of Atmospheric Aerosol Content In Abuesi: A Suburban Coastal Community In Ghana .” 2013. Masters Thesis, University of Ghana. Accessed July 09, 2020. http://ugspace.ug.edu.gh/handle/123456789/23650.

MLA Handbook (7th Edition):

Bempong-Manful, E. “Assessment Of Atmospheric Aerosol Content In Abuesi: A Suburban Coastal Community In Ghana .” 2013. Web. 09 Jul 2020.

Vancouver:

Bempong-Manful E. Assessment Of Atmospheric Aerosol Content In Abuesi: A Suburban Coastal Community In Ghana . [Internet] [Masters thesis]. University of Ghana; 2013. [cited 2020 Jul 09]. Available from: http://ugspace.ug.edu.gh/handle/123456789/23650.

Council of Science Editors:

Bempong-Manful E. Assessment Of Atmospheric Aerosol Content In Abuesi: A Suburban Coastal Community In Ghana . [Masters Thesis]. University of Ghana; 2013. Available from: http://ugspace.ug.edu.gh/handle/123456789/23650

2. Στεφανής, Νικόλαος-Αλέξιος. Η επίδραση της εν ξηρώ απόθεσης των θαλασσίων αερολυμάτων στους δομικούς λίθους των μνημείων.

Degree: 2008, University of the Aegean; Πανεπιστήμιο Αιγαίου

The purpose of the present research is the study of the deposition of marine aerosol which follows the atmospheric pathway on the surface of historic buildings. The study was based on a field experiment that was conducted in the Medieval City of Rhodes, Greece. A monitoring network was organised on the fortifications of the city. Suspended particles were collected using a cascade impactor - MOUDI (Micro Orifice Uniform Deposit Impactor) - during twelve sampling events spread over a one-year period. Meteorological data were also collected in order to correlate them with the aerosol production and transportation phenomena. Freshly quarried stone samples were placed on the fortifications to study both the aerosol deposition and stone weathering rate. Stone samples from dated buildings, having different orientation, were collected to study the factors that affect the quantity of deposited halite. The morphology and chemical composition of the suspended and deposited particles were studied with SEM/EDX. The microphotographs acquired were processed by Image-Pro Discovery software to study the physical characteristics of particles. The chloride content of the stone samples was determined by potentiometric titration of aqueous solutions. Suspended and deposited particles present similarities. Halite’s crystal habits depend on the prevailing meteorological conditions at the time of deposition. It was observed that north winds in Rhodes produce fine detrital and marine particles which can be transferred in long distances. The most susceptible buildings are those that lie with 100 m from the coast. The weathering effect of marine aerosol was verified on the fresh stone samples that were exposed for one year. The stone mass loss and the halite crystallisation pressure were calculated. The pressure that halite crystals exert on the stone pores is capable of producing severe damage. The results were correlated with the experimental data in order to establish the weathering effect of marine aerosol

Ο στόχος της εργασίας είναι η μελέτη της τροφοδοσίας των δομικών λίθων με διαλυτά άλατα τα οποία ακολουθούν την ατμοσφαιρική οδό οδηγώντας στην διάβρωση των ιστορικών κτιρίων. Η μελέτη στηρίχθηκε σε ένα πείραμα πεδίου που πραγματοποιήθηκε στη μεσαιωνική πόλη της Ρόδου. Ένα δίκτυο παρακολούθησης οργανώθηκε στις οχυρώσεις της μεσαιωνικής πόλης. Τα αιωρούμενα σωματίδια συλλέχθηκαν με το MOUDI (Micro Orifice Uniform Deposit Impactor) κατά τη διάρκεια δώδεκα κύκλων δειγματοληψίας αερολυμάτων κατανεμημένων σε ένα ημερολογιακό έτος. Συγχρόνως, συλλέχθηκαν μετεωρολογικά δεδομένα για τη συσχέτιση των φαινομένων της παραγωγής και της απόθεσης των αερολυμάτων με τις επικρατούσες μετεωρολογικές συνθήκες. Ειδικά διαμορφωμένα δοκίμια λίθου τοποθετήθηκαν στα οχυρωματικά τείχη της πόλης για τη μελέτη του ρυθμού απόθεσης των σωματιδίων και της έντασης της διάβρωσής τους. Επίσης δείγματα δομικού λίθου από χρονολογημένα μνημεία με ποικίλο προσανατολισμό και απόσταση από την ακτή, ελήφθησαν ώστε να μελετηθούν οι παράγοντες που επηρεάζουν την αποτιθέμενη…

Subjects/Keywords: Παράκτιο περιβάλλον; Θαλάσσια αερολύματα; Αιωρούμενα σωματίδια; Αλίτης; Απόθεση; Μνημεία; Βιοκλαστικός ασβεστόλιθος; Διάβρωση; Coastal environments; Marine aerosol; Suspended particles; Halite; Deposition; Monuments; Bioclastic limestone; Weathering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Στεφανής, . . (2008). Η επίδραση της εν ξηρώ απόθεσης των θαλασσίων αερολυμάτων στους δομικούς λίθους των μνημείων. (Thesis). University of the Aegean; Πανεπιστήμιο Αιγαίου. Retrieved from http://hdl.handle.net/10442/hedi/24407

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Στεφανής, Νικόλαος-Αλέξιος. “Η επίδραση της εν ξηρώ απόθεσης των θαλασσίων αερολυμάτων στους δομικούς λίθους των μνημείων.” 2008. Thesis, University of the Aegean; Πανεπιστήμιο Αιγαίου. Accessed July 09, 2020. http://hdl.handle.net/10442/hedi/24407.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Στεφανής, Νικόλαος-Αλέξιος. “Η επίδραση της εν ξηρώ απόθεσης των θαλασσίων αερολυμάτων στους δομικούς λίθους των μνημείων.” 2008. Web. 09 Jul 2020.

Vancouver:

Στεφανής . Η επίδραση της εν ξηρώ απόθεσης των θαλασσίων αερολυμάτων στους δομικούς λίθους των μνημείων. [Internet] [Thesis]. University of the Aegean; Πανεπιστήμιο Αιγαίου; 2008. [cited 2020 Jul 09]. Available from: http://hdl.handle.net/10442/hedi/24407.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Στεφανής . Η επίδραση της εν ξηρώ απόθεσης των θαλασσίων αερολυμάτων στους δομικούς λίθους των μνημείων. [Thesis]. University of the Aegean; Πανεπιστήμιο Αιγαίου; 2008. Available from: http://hdl.handle.net/10442/hedi/24407

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Queensland University of Technology

3. Johnson, Graham Richard. The Formation and Growth of Marine Aerosols and the Development of New Techniques for their In-situ Analysis.

Degree: 2005, Queensland University of Technology

Marine aerosols have attracted increasing attention over the past 15 years because of their potential significance for global climate modelling. The size distribution of these aerosols extends from super-micrometer sea salt mode particles down through 150 nm accumulation mode particles, 40 nm Aitken mode particles and nucleation mode particles which extend from 25 nm right down to clusters of a few molecules. The process by which the submicrometer modes form and grow and their composition have remained topics of debate throughout this time in large part because of the difficulties associated with determining their composition and relating it to proposed models of the formation process. The work compared the modality of marine aerosol influencing the South-east-Queensland region with that of other environmental aerosols in the region. The aerosol was found to be consistent with marine aerosols observed elsewhere with concentrations below 1000 cm-3 and frequently exhibiting the distinct bimodal structure associated with cloud processing, consisting of an Aitken mode at approximately 40 nm, an accumulation mode in the range 100-200 nm and a coarse mode attributed to sea salt between 600 and 1200 nm. This work included the development of two new techniques for aerosol research. The first technique measures aerosol density using a combination of aerosol size distribution and gravimetric mass concentration measurements. This technique was used to measure the density of a number of submicrometer aerosols including laboratory generated NaCl aerosol and ambient aerosol. The densities for the laboratory generated aerosols were found to be similar to those for the bulk materials used to produce them. The technique, extended to super-micrometer particle size range may find application in ambient aerosol research where it could be used to discriminate between periods when the aerosol is dominated by NaCl and periods when the density is more representative of crustal material or sulfates. The technique may also prove useful in laboratory or industrial settings for investigating particle density or in case where the composition is known, morphology and porosity. The second technique developed, integrates the existing physicochemical techniques of volatilisation and hygroscopic growth analysis to investigate particle composition in terms of both the volatilisation temperatures of the chemical constituents and their contribution to particle hygroscopic behaviour. The resulting volatilisation and humidification tandem differential mobility analyser or VH-TDMA, has proven to be a valuable research tool which is being used in ongoing research. Findings of investigations relating the composition of the submicrometer marine aerosol modes to candidate models for their formation are presented. Sea salt was not found in the numerically dominant particle type in coastal nucleation mode or marine Aitken and accumulation modes examined on the Southeast…

Subjects/Keywords: Aerosol size distribution; modality; environmental aerosols; marine aerosols; aerosol density; ambient aerosol; VH-TDMA; particle hygroscopic growth; volatility; iodine oxides; non sea salt sulfate; sea salt aerosols; coastal aerosol; marine biota; algae; photolysis; photochemical; thermal decomposition; volatilisation and humidification tandem differential mobility analyser; ultra fine particles.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Johnson, G. R. (2005). The Formation and Growth of Marine Aerosols and the Development of New Techniques for their In-situ Analysis. (Thesis). Queensland University of Technology. Retrieved from https://eprints.qut.edu.au/16117/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Johnson, Graham Richard. “The Formation and Growth of Marine Aerosols and the Development of New Techniques for their In-situ Analysis.” 2005. Thesis, Queensland University of Technology. Accessed July 09, 2020. https://eprints.qut.edu.au/16117/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Johnson, Graham Richard. “The Formation and Growth of Marine Aerosols and the Development of New Techniques for their In-situ Analysis.” 2005. Web. 09 Jul 2020.

Vancouver:

Johnson GR. The Formation and Growth of Marine Aerosols and the Development of New Techniques for their In-situ Analysis. [Internet] [Thesis]. Queensland University of Technology; 2005. [cited 2020 Jul 09]. Available from: https://eprints.qut.edu.au/16117/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Johnson GR. The Formation and Growth of Marine Aerosols and the Development of New Techniques for their In-situ Analysis. [Thesis]. Queensland University of Technology; 2005. Available from: https://eprints.qut.edu.au/16117/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.