School of Physical Sciences (Phys-Sciences) Collectionshttp://hdl.handle.net/10570/1942024-03-29T10:39:04Z2024-03-29T10:39:04ZA 3d basin modelling approach to the assessment of hydrocarbon potential of Lake Edward basin, western UgandaAtwebembeire, Conscenthttp://hdl.handle.net/10570/121202023-09-12T06:28:37Z2023-09-06T00:00:00ZA 3d basin modelling approach to the assessment of hydrocarbon potential of Lake Edward basin, western Uganda
Atwebembeire, Conscent
Lake Edward basin is a rift basin located in the extreme south of the Ugandan portion of the western arm of the East African Rift System (EARS), popularly known as the Albertine Graben. 3D basin modelling approach was applied to Lake Edward basin with the objective of gaining an understanding of its hydrocarbon potential. The approach utilized 2D Seismic data, well data,
geochemical data and well completion reports from Lake Edward basin. 2D seismic data were integrated with well log data to define stratigraphic framework of the basin, onto which heat flow and geochemical characterization was undertaken to establish the possible potential source rocks of the basin.
The integrated 3D basin modelling revealed the burial history, including the development of potential entrapment and source rock maturation. The major structures responsible for the hydrocarbon migration and entrapment in the field as interpreted are fault structures especially tilted faults blocks and normal faults. PetroMod software (version 2018.2) produced hydrocarbon
maturation and generation model of the Lake Edward basin.
The model shows that the source rock, Lower Ngaji Formation is currently at temperatures between 50oC-80oC. According to the model, the source rock, Lower Ngaji with typical characteristics of a mixture of Type II and III kerogen is immature with respect to petroleum generation.
The research has provided a better understanding of key controls on hydrocarbon potential of Lake Edward basin and has enhanced the understanding of the timing and extent of hydrocarbon generation in Lake Edward basin and so the petroleum exploration risk can be potentially reduced This is useful for the oil and gas industry in the country as the findings are helpful in setting the
next drilling phase of future exploration activities.
A dissertation submitted to the directorate of graduate research and training in partial fulfillment of the
requirements for the award of Master of Science degree in Petroleum Geosciences of Makerere University.
2023-09-06T00:00:00ZAbundance and some aspects of breeding biology of African Catfish (Clariasgariepinus) in Kafu Riverine wetlandKikonyogo, Francis Exavierhttp://hdl.handle.net/10570/59062018-02-13T21:20:24Z2017-01-01T00:00:00ZAbundance and some aspects of breeding biology of African Catfish (Clariasgariepinus) in Kafu Riverine wetland
Kikonyogo, Francis Exavier
Various studies on the ecology and biology of Clarias gariepinus have been carried out elsewhere by different scholars but not specific to Kafu Riverine wetland, because of its intraspecific ecological variations, fisheries resource management decisions that have been taken have not helped to address the environmental and human induced problems in the river catchment areas, therefore information generated from this study will help to address the above problems. This riverine wetland has two habitat types (open pools of water and closed wetland) this support a variety of fish species including Clarias gariepinus which account for 82% of the fishery of river Kafu.
In this study, fish samples were caught using various fishing gears such as basket traps gillnets and hooks. This was done once every fortnight and average catch per unit effort derived. The relations of fecundity to standard length (cm), total weight (g) and gonadal weight (g) were determined by regressionPearson‟s statistics.Results of this study revealed that, the abundance of Clarias gariepinusper day was significantly higher in the open than in the closed wetland type, the abundance was6.19±0.65and 3.0±0.65 fish in the open and closed wetlands respectively (P< 0.008). Within seasons, a significant difference in abundance of this species per day was 6.75±0.612and 2.43±0.612in the wet and dry seasons, respectively(P<0.042).Clarias gariepinus exhibited a weak
positive linear relationship with total length and somatic weight. However, a strong positive linear relationship was found between fecundity and gonadal weight: y = 366.3x + 7982, (r2=0.721, N = 157, p< 0.01). Therefore, gonadal weight was the best indicator of fecundity accounting for 72% of the variation in fecundity of Clarias gariepinus in Kafu riverine wetland. Gonadal somatic index (GSI) values of both females and males were at their highest during the months of October and November respectively and eventually started declining in mid-November which indicated the
spawning activity. Therefore, November was presumed to represent the spawning period of Clarias gariepinus in Kafu riverine wetland. Males matured earlier (L50=33.7cm) than females (50= 33.7cm). Despite of C.gariepinus enormous contribution to the livelihood of the people especially in its catchment area, it is being threatened by human activities such as over fishing and environmental fluctuations which have caused changes in the abundance and reproduction of this specie Therefore information from this study will help to update managers especially in the affected districts on the key aspects of ecology and reproduction that needs attention for sustainable management of the fisheries resources.
A thesis submitted in partial fulfillment of the requirements for the award of the Masters of Science Degree in Zoology of Makerere University
2017-01-01T00:00:00ZAdsorption behavior of acid-leached clays in bleaching of oilMukasa-Tebandeke, I. Z.Ssebuwufu, P. J. M.Nyanzi, S. A.Nyakairu, G. W.Ntale, M.Lugolobi, F.Schumann, Andreashttp://hdl.handle.net/10570/58962018-02-12T02:45:18Z2015-01-01T00:00:00ZAdsorption behavior of acid-leached clays in bleaching of oil
Mukasa-Tebandeke, I. Z.; Ssebuwufu, P. J. M.; Nyanzi, S. A.; Nyakairu, G. W.; Ntale, M.; Lugolobi, F.; Schumann, Andreas
The available data have shown that acid-leached clays had sites for adsorption of impurities in oils.
Data obtained on residual impurities in cotton and sunflower-seed oils bleached with the same
clay materials produced linear Langmuir and Freundlich isotherms. The increase in constant, k
with increase in both temperature of thermal activation and concentration of acid used to leach
the clay, suggests that bleaching efficiency increased. The value of n decreased with increase in
temperature of activation and concentration of acid used to leach the clay suggesting that bleaching
capacity increased. The mineral compositions of the clays influenced their surface, structural
and bleaching properties.
2015-01-01T00:00:00ZAdvances in carbon dioxide and propylene oxide copolymerization to form poly(propylene carbonate) over heterogeneous catalystsMbabazi, RuthWendt, Ola F.Nyanzi, Steven AllanNaziriwo, BettyTebandeke, Emmanuelhttp://hdl.handle.net/10570/108332022-10-06T07:40:02Z2022-01-01T00:00:00ZAdvances in carbon dioxide and propylene oxide copolymerization to form poly(propylene carbonate) over heterogeneous catalysts
Mbabazi, Ruth; Wendt, Ola F.; Nyanzi, Steven Allan; Naziriwo, Betty; Tebandeke, Emmanuel
Chemical conversion of carbon dioxide (CO2) into value-added products is an attractive industrial process
because it offers several economic and environmental advantages. This review presents advances and challenges
in the CO2 and propylene oxide (PO) co-polymerization using heterogeneous catalysts to form poly (propylene
carbonate) (PPC), an environmentally friendly polymer with several applications. In the co-polymerization
process, CO2 is employed as a green carbon source, an alternative to the toxic phosgene which has numerous
negative environmental impacts. However, this route of polycarbonate production, is hindered by the chemical
inertness of CO2, and to overcome this, various catalysts have been developed. A number of heterogeneous
catalysts including carboxylates, double metal cyanides and composites, have achieved varying success in
activating CO2 in the production of polycarbonates. The effect of different reaction conditions including pressure,
temperature and solvent has been explored. The limitations faced by various heterogeneous catalysts and im-
provements made over the past decades have been highlighted. Mechanistic insights for the production of PPC
from CO2 and PO have been presented and the differences in both the regioselectivity and stereochemistry of the
resultant polymers discussed.
2022-01-01T00:00:00Z