Browsing Masters Theses and Dissertations [MEWES] by Title
Now showing items 56-74 of 74
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The removal of arsenic from synthetic solution using a sand filter coupled with zero valent iron
(NM-AIST, 2024-07)Contamination of groundwater with arsenic (As) poses a serious risk to public health, demanding the development of effective remediation technology. This study investigated the use of sand filters coupled with of ... -
Removal of heavy metals from water by capacitive deionization electrode materials derived from chicken feathers
(NM-AIST, 2019-03)Capacitive deionization (CDI) is an emerging desalination technology based on the principle of electrical double layer capacitors. When the voltage is applied to the surface of the electrodes, electrodes become oppositely ... -
Removal of hydrogen sulfide and ammonia from biogas using Oldoinyo Lengai Volcanic ash
(NM-AIST, 2019-02)Oldoinyo Lengai mountain located in Northern Tanzania is the only active natrocarbonatite volcano with unusually alkali-rich natrocarbonatites which are not found elsewhere in the world. Volcanic ash formed earlier during ... -
Removal of hydrogen sulfide from biogas using red rock materials
(NM-AIST, 2020-03)In this study, the potential of red rock materials for the removal of hydrogen sulfide from biogas was studied. The rock samples were collected, sieved and organized in various particle size ranges such as 0.32 - 250 µm, ... -
Removal of hydrogen sulfide from biogas using sweet potato’s leaves derived activated carbon
(NM-AIST, 2020-04)Hydrogen sulfide gas contained in biogas is both corrosive and poisonous. In this study a performance of sweet potato leaves activated carbon for hydrogen sulfide removal from biogas was evaluated. The samples were ... -
Rheological and physicochemical analysis of non- edible oils used for biodiesel production
(NM-AIST, 2023-07)The knowledge of the physicochemical and rheological flow characteristics of biodiesel feedstock is used for quality control in production, storage and transportation processes. Moreover, the knowledge is applied in ... -
Risk of heavy metals exposure through consumption of rice from Kahama and Geita districts
(2016-04)Heavy metals exposure is associated with various human health problems. This research aimed at determining the levels of heavy metals in paddy soils and in polished rice from villages around the artisanal gold mining areas ... -
Risks of sanitation facilities to groundwater pollution in Babati town, Tanzania
(NM-AIST, 2019-03)Despite of its importance for human consumption groundwater resource is under threat of overexploitation and pollutions. The study to assess the risks of sanitation facilities to groundwater pollution was carried out in ... -
Simulation, performance analysis and improvements of solar farm installation in Tanzania
(NM-AIST, 2019-04)With the environmental advantages of solar energy, the use of solar photovoltaic (PV) in electricity generation is encouraged by Tanzanian governments, however, the number of institutions that are benefiting from installing ... -
Sources and hydro-geochemical characteristics of lake Duluti waters, Tanzania
(NM-AIST, 2019-11)Water chemistry, and stable isotopes of oxygen and hydrogen ( 18O and 2H), were used collectively to characterize and quantify Lake Duluti (L. Duluti) – groundwater interaction. Physico-chemical parameters including ... -
Strength and durability properties of concrete blended with pumice and scoria under combined attack of sulphate and chloride
(NM-AIST, 2021-11)Concrete structures suffer serious deterioration under corrosive environment. Consequently, the safety of these concrete structures is decreased. The influence of natural pumice (NP) and natural scoria (NS) as supplementing ... -
Sustainability assessment of existing septic systems in residential buildings: a case study of Mwanza city, Tanzania
(NM-AIST, 2022-07)Septic system (SS) is the oldest anaerobic wastewater treatment system still widely employed today in suburban and urban areas. The sustainability of SS in developing countries, including Tanzania, is restricted by ... -
Synthesis of mesoporous carbon from non-biodegradable plastic bags for water purification: methylene blue removal
(NM-AIST, 2017-12)In the present work, the mesoporous carbon materials with pore diameter of 14.2 nm and specific surface areas of 15.18 (m2g-1) identified by Brunauer, Emmett, and Teller (BET) were synthesized from non-biodegradable ... -
Theoretical and experimental studies of combination of synthetic dye (indoline d131) and natural dye (lawsone) for dye sensitized solar cells applications
(NM-AIST, 2019-02)Dye sensitized solar cells (DSSCs) convert visible sunlight to electricity using a wide band semiconductor. The DSSCs have attracted many researchers due to their environmental friendliness, low manufacturing cost and ... -
Theoretical and experimental studies of imidazolium based ionic liquids for supercapacitors application
(2020-03)The theoretical study of neutral ion pairs of 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF4]) and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][NTf2]) has been performed. The formation ... -
Theoretical study of structural and thermodynamic properties of gaseous metal hydrides m2xh4 (m = li, na; x = be, mg)
(2016-04)This study aimed to explore the properties of the complex hydrides which seem to be the promising candidates for hydrogen storage materials. The geometrical structure, vibrational spectra and thermodynamic characteristics ... -
The use of pesticidal plants as environmental friendly Practice for field and storage pests’ management in Common beans and cowpeas
(2016-04)Infestation caused by insect pests on legumes has been witnessed to cause losses in the fields during cultivation as well as during storage. Use of pesticidal plants is seen as an alternative option although it is not used ... -
Water quality variation and pollutants transformation in the Nadosoito dam of Arkatani village, Monduli district
(NM-AIST, 2019-02)The study aimed at assessing seasonal dynamics of water quality parameters, transformation of selected pollutants and seasonal diversity of selected microorganisms (Cyanobacteria) in Nadosoito dam of Arkatani Village, ... -
Water use and crop water productivity in farmer managed irrigation schemes across agro ecological zones of usa river catchment
(NM-AIST, 2021-11)The Usa River Catchment is the potential area dealing with traditional irrigated agriculture. This study aims to estimate the amount of water abstracted for and yield that reflect water values to enhance crop water ...