• Determining the extent of de facto water re-use in South Africa : the case of wastewater treatment plants in Gauteng, KwaZulu-Natal and Western Cape provinces 

  Swana, Umhle Unathi (2022-01-26)

  The water quality of South African rivers is greatly impacted by insufficiently treated wastewater effluents (de facto reuse). Although de facto reuse serves as an alternative water supply it poses potential threats to ...
• Application of chlorine dioxide as an alternative pre-oxidant in the treatment of eutrophic raw water 

  Strydom, Willem Frederick (2017-10)

  The Vaalkop water treatment works (WTW) abstracts water from the Vaalkop Dam, which is situated in the Crocodile West/Marico Water Management Area of South Africa. The bulk of the inflow into the dam is through a canal fed ...
• Synthesis and characterization of hybrid iod exchange resins embedded with hydrous ferric oxide nanoparticles for the removal of metal ions from acid mine drainage 

  Sodzidzi, Zizikazi (2020-10)

  Acid mine drainage (AMD) is a serious water pollutant that contaminates freshwater sources such as rivers, lakes, ground water and even sediments with heavy metals which include Cr(VI), Cd(II) and Pb(II). In this study a ...
• Metal supported on carbon based materials for adsorptive desulphurisation of fuels 

  Mguni, Liberty Lungisani (2021-09-19)

  The transport industry is one of the biggest contributors to air pollution, with the major air pollutants being COx, NOx, and SOx. SOx is produced by the combustion of the organic sulphur compound found in fuels, e.g. ...
• Characterization and properties of sulfonated chitosan membrane for direct methanol fuel cell 

  Modau, Livhuwani Elsie (2023-04-11)

  This dissertation examines the structure and properties of chitosan membranes regarding their applicability in fuel cells. The objective of this work is to synthesize a polymer membrane with improved properties such as ...
• Process synthesis and experimental analysis of waste tire thermochemical conversion processes 

  Mavukwana, Athi-Enkosi (2023-04-11)

  The thermochemical conversion of waste tires for chemicals and power production is investigated using process synthesis techniques and experimental analysis. Pyrolysis and gasification technologies were evaluated in terms ...
• Functional characterization of lignin modifying enzymes produced by white rot fungi for their mycoremediation potential of petroleum (xenobiotic) polluted soil 

  Heri, Sylvie Mauwa (2022-12-19)

  Industrialization has resulted in the introduction of xenobiotics into the environment. These chemicals have polluted soil, water, and air, causing significant health concerns. White rot fungi possess the capability to ...
• Sustainability of municipal wastewater treatment plants operations in Ethekwini municipality 

  Mavuso, Precious Itumeleng (2023-01)

  Municipal wastewater pollution in developing countries is a great concern due to partially treated or untreated wastewater. Inflow and Infiltration (I/I) is a challenge in municipalities that receive stormwater as it impacts ...
• Development of greener sample preparation methods for extraction and spectrometric determination of metals in selected fuel samples 

  Mdluli, Njabulo Simanga (2022-02)

  Crude oil is an unrefined petroleum which forms because of dead organisms buried under mud over a long period of time (million years). The mud is then converted to sedimentary rocks, which create intense heat and pressure, ...
• Process simulation of the co-gasification of biomass and polythlene 

  Khumalo, Nomadlozi Lucy (2021-12)

  The aim of this study was to determine the effects of the feedstock composition, such as biomass, polyethylene and their respective blend ratios, -gasifying agents and operating conditions on the product gas composition, ...
• Nitroxide polymer mediated oxidation of cellulose : preparation and applications 

  Sun, Tingting (2022-03)

  2, 2, 6, 6-Tetramethylpiperidine-N-oxyl radical (TEMPO) is a stable nitroxyl radical, as well as a highly efficient selective oxidation catalyst. It can efficiently catalyze the selective oxidation of C6 primary hydroxyl ...
• The combined solar-photovoltaic electricity and solar-themal heat application in power to chemicals process schemes: consideration of optimal solar photovoltaic surface area fractions 

  Llane, Maphala Ephraim (2021-09)

  Power-to-chemicals processes hold tremendous potential to enable the widespread adoption of renewable sources of energy and to open many avenues to the green hydrogen economy. These processes will play a critical role ...
• Conceptual design of a glycerol biorefinery 

  Mukeru, Bahizire Martin (2021-12)

  Glycerol is considered as the major waste from biodiesel production since every 1L of biodiesel produced is accompanied by 0.1 L of glycerol by-product. Utilizing this waste as a biorefinery feedstock will not only ...
• Fischer-Tropsch synthesis fixed bed reactor intensification 

  Shen, Jianqi (2021-12)

  A 2D pseudo-homogeneous fixed bed reactor model was developed using ANSYS Fluent, based on an actual bench-scale Fischer-Tropsch reactor. The single-tube reactor had a diameter of 0.05m, which is representative of the ...
• Reduced graphene oxide supported cobalt catalysts for hydroformylation and Fischer-Tropsch synthesis 

  Chang, Jianli (2021-12)

  Reduced graphene oxide (RGO) supported cobalt based catalysts with or without rhodium promotion, Rh-Co/RGO (RCG) and Co/RGO (CG), were successfully synthesized and evaluated in both Fischer Tropsch synthesis (FTS) and ...
• The role of cobalt species in Fischer Tropsch synthesis: effects of support characteristics and reducing conditions 

  Shiba, Nothando Cynthia (2021-07-20)

  The industry’s great interest is to intensify the cobalt-based Fischer-Tropsch synthesis (FTS) process by increasing the per-pass conversion and the production of long chain hydrocarbons. To achieve this goal, it is ...
• Adsorptive desluphursation of diesel fuel on unprocessed amarula (sclerocarya birrea) wastes or synthesized activated carbons from biomass wastes 

  Kabi, Tsepiso Regina (2020-10)

  Diesel fuel has been found to contain highly concentrated organo-sulphur compounds which have bad impact economically, environmentally, and health-wise. Adsorptive desulphurization (ADS) is one of the promising processes ...
• Transition metal oxides supported on activated carbon for adsorptive desulfurization of diesel fuels 

  Nkomzwayo, Thulisile Nombuso (2020-11-30)

  In this study, period four transition metal oxides (Zn, Cr, Mn, Co, Fe, Cu, Ni), acting as intermediate Lewis acids, were supported on activated carbon (AC) and used in the adsorptive desulfurization (ADS) of model and ...
• Ethylene activity and Fischer-Tropsch synthesis: new perspectives in reaction mechanism 

  Zhang, Yusheng (2021-01)

  With the aim of studying the reactivity of ethylene and consequently understanding and elucidating aspects of the Fischer-Tropsch (FT) reaction mechanism, a large number of experiments were conducted using feed gas ...
• A theoretical analysis of the implications of comminution practices on open pit mine planning 

  Thage, Rorisang Gomolemo (2020-12)

  The implications of comminution practices on the planning of a typical open pit mine was investigated in this study by means of computer simulation. The objective was to assess the effects of mining costs as well as ...

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