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Browsing Theses and Dissertations (Chemistry) by Issue Date

Browsing Theses and Dissertations (Chemistry) by Issue Date

Now showing items 1-20 of 73

Determination of volatile organic compounds in ambient air by using thermal desorber, sorbent tubes, canister and GC-MS

Mkhwanazi, Sipho Sydney (2009-06)

The dissertation deals with volatile organic compounds that evaporate from the water-oil separate in the refinery, which causes bad odour around the neighbouring communities, the existence of these compounds are being ...
Reduction of ferric and ferrous compounds in the presence of graphite using mechanical alloying

Moloto, Ledwaba Harry (Vaal University of Technology, 2011-05)

Many oxidic iron compounds—iron oxides; oxy-hydroxides and hydroxides—not only play an important role in a variety of disciplines but also serve as a model system of reduction and catalytic reactions. There are more than ...
Separation and recovery of selected transition-metal catalyst systems using membrane processes

Xaba, Bongani Michael (2011-06-06)

Membrane separation processes offer a promising alternative to energy-intensive separation processes such as distillation and solvent extraction. NF and RO are among the most investigated membrane processes with a potential ...
Identification and quantification of selected pesticides in surface water in Southern Gauteng region

Bucibo, Malesole Nontutu Gadihele (2011-06-10)

The increased production and application of pesticides for agricultural and non-agricultural purposes has caused the pollution of air, soil, ground and surface water. This has a negative impact on the environment as well ...
Effects of oxidation states of Copper (Cu), Nickel (Ni), Palladium (Pd) and Silver (Ag) on rejection by nanofiltration membranes

Brooms, Thabo John (2011-08-10)

Mining industry produces metals which are economical and serve as high valuable commodities in South Africa. This country is regarded as the world leading producer of precious metals such as platinum group metals (PGMs). ...
Synthesis and characterization of cobalt and copper sulfide nanoparticles with reproducible stoichiometry using sulfur containing single-source precursors

Sibokoza, Simon Bonginkosi (2012)

Complexes of alkyldithiocarbamate and thiuram have been extensively explored for various applications in the medical field. Thiuram and dithiocarbamate ligands were used to prepared complexes of cobalt and copper. The high ...
Synthesis and characterization of graphene and carbon nanotubes for removal of heavy metals from water

Thema, Force Tefo (Vaal University of Technology, 2012-06)

The commercial flake graphite was prepared into functionalized graphite oxide (GO) by adopted chemical treatment. After the exfoliation and intercalation of graphite into functionalized graphene oxide that formed stable ...
Impact of metallurgical industries on water

Matsie, Simon Sello (Vaal University of Technology, 2012-07)

The increase in industrial activities has contributed towards an increase in environmental pollution problems. Many ecosystems have deteriorated as a result of an accumulation of pollutants including heavy metals contained ...
Competitive biosorption of a mixture of cationic dyes from a multicomponent solution using modified pine cone powder

Ngema, Silindile Lucia (Vaal University of Technology, 2012-07)

The biosorption of methyl violet and methylene blue onto modified pine cone powder was studied. Single and binary component systems studies were carried out for the biosorption of methyl violet and methylene blue onto raw, ...
Development of a simple technique for selective removal of cesium in wastewater in the presence of mixed alkali metals

Pholosi, Agnes (Vaal University of Technology, 2012-08)

Amongst treatment technologies, adsorption is rapidly gaining prominence because it can remove metal pollutants at low concentrations, economical, ease of operation, and the adsorbent can be regenerated for reuse. This ...
Isolation and characterization of bioactive compound from Combretum erythrophyllum leaf extracts

Ledwaba, I.P (Vaal University of Technology, 2012-08)

Combretum erythrophyllum has been used for medicinal purposes and several studies have been carried out to investigate the bioactive compounds present in the leaves of this plant. The World Health Organization reported ...
Modification of glassy carbon electrode (GCE) with prussian blue as a mediator on carbon nanotube materials through sequential deposition

Abdullahi Mohamed, Farah (Vaal University of Technology, 2012-08)

Prussian blue (PB) nanoparticles were synthesized from FeCl3.6H2O, K4[Fe(CN)6].3H2O, and from Fe(NO3)3.9H2O and K4[Fe(CN)6].3H2O, and then characterized by Fourier transform infrared (FT-IR), Ultraviolet-visible spectroscopy, ...
Synthesis and characterization of carbon nanomaterials using BIS(acetylacetonato)oxovanadium(IV), Manganese(III) Acetylacetonate, Co-Zn and CoAI as catalyst precursors.

Ndwandwe, Silindile Nomathemba. (2012-11-01)

Bis(acetylacetonato)oxovanadium(IV), Manganese(III) acetylacetonate, Co-Zn and Co-Al were prepared as catalyst precursors for the synthesis of carbon materials in a catalytic chemical vapor deposition (CCVD) reactor. The ...
Evaluation of biological activities of nine anti-inflammatory medicinal plants and characterization of antimicrobial compounds from Pomaria sandersonii and Alepidea amatymbica

Muleya, Eddwina (2013)

Medicinal plants provide valuable alternative sources of drugs and drug discovery because many have been used in traditional practices for centuries to manage or treat various forms of ailments. The aim of this study was ...
Development and optimization of selective leaching processes for the extraction of calcium from steel slag in view of sequestering carbon dioxide

Kotoane, Alice Mpho (2013-05)

Several technologies are currently being developed to mitigate the greenhouse gas CO2. One of these promising processes is industrial mineral carbonation whereby alkaline industrial wastes are taken as raw material. The ...
Determination of the antibacterial, antioxidant activity, isolation and characterisation of active compounds from the leaves of Rhys Leptodictia plant

Matamela, Tshifhiwa (2014-02)

Rhus leptodictya commonly known as a mountain karee belongs to the family Anacadeceae and has been used since antiquity in tradition medicine. In the present study antimicrobial and antioxidant potentials of the leaves of ...
Method development and Validation for the determination of selected Polycyclic Aromatic Hydrocarbons (PAHs) in water by Solid Phase Extraction and High Performance Liquid Chromatography

Xoliswa, Madlanga (Vaal University of Technology, 2014-02-12)

Polycyclic Aromatic Hydrocarbons (PAHs) are one of the pollutants in the environment. They are organic compounds that consist of more than one aromatic ring (Kanchanamayoon & Tatrahun 2008). Due to less information forthcoming ...
TiO₂-supported dealuminated clinoptilolite: synthesis characterisation and kinetic studies for enhanced photo catalytic degradation of volatile organic compounds

Sanni, Saheed Olalekan (2014-06)

Advanced oxidation processes (AOPs) are supposedly effective means for removal of low concentration of organic pollutants from waste water as compared to conventional treatment methods. However, TiO2 metal semiconductor ...
Synthesis, characterization and anti-bacterial studies or Hydrazide Schiff bases of Acetylacetonate metal complexes

Dikio, Charity Wokwu (2014-06)

Infectious diseases, a group of illnesses caused by specific pathogens or its toxins is a leading cause of death globally. Treatment with antibiotics is a key intervention in the control and management of many infectious ...
Synthesis of cross-linked pine cone biosorbent and its applications in industrial wastewater treatment

Kupeta, Albert Jerry Kafushe (2014-11)

The widespread use of phenols and phenolic derivatives in industrial applications has resulted in their discharge as part of industrial wastewater. These chemicals are toxic and need to be removed from the aqueous environment. ...