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Assessing the potential of modified rice husk-based Silica adsorbent for the removal of Atrazine from wastewater
(Kyambogo University (Unpublished work), 2025-08) Cweke, Patrick
Atrazine (6-chloro-N2-ethyl-N4-isopropyl-1,3,5-triazine-2,4-diamine) or (2-chloro-4-(ethylamino)-6-(isopropylamino)-1,3,5-triazine) is a very common herbicide used on large scale farming to control weeds by farmers and it must be removed from the wastewater because of the serious harm it causes to the environment and its health risk to human. This research aimed at the use of modified rice husk derived silica adsorbent from waste agricultural biomass for atrazine removal from wastewater. The adsorbent was made by the process of pyrolysis, chemically activated with 7.5% Potassium Hydroxide. The characterisation results by the Scanning Electron Microscopy (SEM) and Fourier Transform Infrared (FTIR) spectroscopy showed that the modified rice husk-based silica adsorbent has good pore structure, oxygen containing functional groups and silica properties. The influence of contact time, adsorbent dosage, initial concentration and pH were investigated by use of a UV-Vis spectroscopy analysis. The adsorption studies were conducted in batch mode, and the results showed that the modified rice husk-based silica adsorbent exhibited high adsorption capacity for atrazine. The adsorption data were fit to several isotherm models such as Langmuir and Freundlich, and kinetic models such as pseudo-first order and pseudo-second-order reactions. The experiments showed that the adsorption process obeyed the Freundlich isotherm and pseudo-second order kinetic model, which means it followed a multi-layer adsorption mechanism and chemisorption which showed sharing of electrons between the adsorbate and the adsorbent. The highest adsorption capacity obtained was 702 mgg-1, which is like other reported adsorbents in the literature. The adsorbent was also discovered to be recyclable, suffering only a small decrement in adsorption capacity after five adsorption-desorption cycles. UV-visible spectrophotometer analysis confirmed the efficient removal of atrazine from wastewater using the modified rice husk-based silica adsorbent. In general, this research shows that the modified rice husk-based derived silica adsorbent can be used as a cheap and environmentally friendly material for the removal of atrazine from wastewater.
Performance appraisal practices and quality teaching in selected government-aided primary schools in Nyakayojo division Mbarara city, Uganda
(Kyambogo University (Unpublished work), 2025-11) Chandiru, Christine
This quantitative study examined the influence of performance appraisal practices of teachers on the quality of teaching in government-aided primary schools in Nyakayojo division, Mbarara city. Study assesed Study sough to determine the influence of goal setting, feedback practices and Performance Monitering on the quality of teaching in governmentaided primary schools in Nyakayojo Division, Mbarara City Council. Guided by a quantitative research design, data was collected using a structured questionnaire from 89 primary school teachers selected from 5 schools. The descriptive, pearson correlatiion and multiple regression results revealed that; (i) Goal clarity (r=.33, β =0.413, p < 0.05), had a significant contribution to the quality of teaching, for school leaders, provided supportive and transformational guidance to teachers about performance goals, teachers understood their expectations and were motivated to effectively do their teaching roles, (ii) Formal Feedback (β =-0.258, p < 0.05) had a negative influence on the quality of teaching. Though feedback was given to teachers on how to improve their skills for better performance and how to apply the feedback to improve their performance, it actually decreased the quality of teaching.
Teachers had average attachment to the teaching profession, since their schools, lacked a positive work environment that endears an employee to improve his career. ; (iii) Both Training (β =0.642, p < 0.05) and promotion (β =0.265, p < 0.05) good positive influences on the quality of teaching. Teachers were more concerned with professional development than promotion. The study concluded that performance appraisal practices a play a pivotal role in bridging the gap between school expectations and quality of teaching. The school heads who exhibited transactional employee management traits in their leadership improved the role performance of their teachers. The study recommended that School leadership in primary schools should be made by MOES a professional development practice rather than standards enforcement activity of government, so that teachers can fully benefit from it in terms of appropriate goal setting, feedback and performance management.
Supplier selection process management and procurement performance : a case study of management training and advisory centre
(Kyambogo University (Unpublished work), 2024-12) Bugabe, Joseph
The topic of study was supplier selection process management and procurement performance a case of Management Training and Advisory Centre. The three objectives of the study were; to establish the relationship between bid evaluation and procurement performance, to evaluate the relationship between supplier selection and procurement performance and to examine the relationship between advertisement methods and procurement performance. The researcher employed a cross-sectional study design incorporating both quantitative and qualitative methods of data collection. The data systematically collected and presented to give explanatory analysis to particular phenomena with emphasis to cover the extent of the problem. The study was based on a sample size of 92 respondents from the total population of 120 employees of MTAC. Both “quantitative and quantitative data was collected and was analyzed using descriptive techniques of percentages and mean. Pearson correlation coefficients were used to determine the relationship between the variables. The findings in the study obtained indicated that there is a statistically significant moderate positive correlation between supplier selection process management and procurement performance, the results further indicated that there is a weak positive correlation between Procurement Performance and Advertising Method and the study further indicates that there is insignificant relationship between advertising method and procurement performance. The study concluded that the principles of fairness, transparency, and ethical conduct are essential to maintain throughout the supplier selection process. The study made the following recommendations; Prioritize Fairness, Transparency, and Ethical Conduct during the supplier selection process. In line with this the researcher concluded that procurement stakeholders at MTAC should follow PPDA Act, guideline and regulations as they are carrying out the process of supplier selection in order to improve procurement performance
Cultural branding: an awareness campaign to link traditional mursik drink with sebei millennials
(Kyambogo University (Unpublised work), 2024-12) Chelangat, Dewos
The purpose of this study was to create an awareness campaign for the Sebei Mursik cultural drink using graphic design approaches to popularize it among Sebei millennials. The study was significant because it bridged the gap between Sebei millennials and Mursik drink through awareness campaign. The objectives of the study were to Establish the attributes and cultural significance of Mursik cultural drink; To explore how the attributes of Mursik Cultural drink can be reconfigured into graphic symbols and design an awareness campaign for Mursik cultural drink through use of reconfigured symbols towards popularizing it among Sebei millennials. The study used ethnographic research design and was carried out in Tegeres, and Amanang in the Kapchorwa and Bukwo districts respectively. A total of 43 respondents including Traditional leaders, millennials, Mursik producers, and graphic designers were purposively selected to participate in the study. Data was collected using in-depth interviews and analysed through studio experimentation. Findings revealed that Mursik is of great significance in the Sebei culture which includes Bridal Purity, Identity, Love and respect, Parenting, Hospitality, Blessing, and stamina among others. Findings further revealed modernization and urbanization greatly eroding Mursik culture hence unpopular among Sebei millennials. finding meant that Mursik was still important in modern life and the study conducted an awareness campaign for Mursik drink through reconfigured symbols to popularize it among Sebei millennials. The study recommends further research on graphic strategies to create awareness of cultural norms and practices keep it popular in modern society through visual communication.
Cell phone usage, parent-child attachment and students’ indiscipline among Kyambogo university undergraduate students
(Kyambogo University (Unpublished work), 2024-10) Biyinzika, Miriam Rose
The study sought to examine the relationships between cell phone usage, parent-child attachment, and students' indiscipline among Kyambogo University undergraduate students. A cross-sectional survey was used as the research design, with undergraduate students from each faculty selected as the sample through proportionate sampling. Data was collected from 349 respondents using a self-administered questionnaire from a population of 30,501 students. Analysis using correlation and regression was performed on the data with SPSS version 22. The results revealed that there was no significant relationship between parent child attachment and students' indiscipline (p = 0.078, >0.050, r = 0.691) but there was a significant relationship between cell phone use and students' indiscipline. Furthermore, cell phone usage significantly contributes to parent child attachment, accounting for 61.7% of the variance. The relationship between cell phone usage and students' indiscipline was examined further using the Sobel test to see if parent-child attachment significantly mediated it. The findings demonstrated that the relationship between students' indiscipline and cell phone use is significantly mediated by parent-child attachment (Z = 3.86, p < .001).
In conclusion, technology impacts on student behavior and parent – child attachment. Therefore, the study recommends implementation of strategies geared toward healthy parent – child attachment and responsible usage of cellphones to avert or minimize acts of indiscipline.