A5089005144- Geochemistry and Geologic Mapping
- Thermochemical Biomass Conversion Processes
- Polymer crystallization and properties
- Mine drainage and remediation techniques
- Recycling and Waste Management Techniques
- Thermal and Kinetic Analysis
- Thermodynamic properties of mixtures
- Chemical Thermodynamics and Molecular Structure
- Religion, Society, and Development
- Phase Equilibria and Thermodynamics
- Mining Techniques and Economics
- Fusion materials and technologies
- Advanced ceramic materials synthesis
- Plasma Diagnostics and Applications
- Plasma Applications and Diagnostics
- Polymer Nanocomposites and Properties
- Aluminum Alloys Composites Properties
- Recycling and utilization of industrial and municipal waste in materials production
- Hydrology and Watershed Management Studies
- Nuclear Materials and Properties
- Flood Risk Assessment and Management
- Silicone and Siloxane Chemistry
- Laser-induced spectroscopy and plasma
- Radioactive element chemistry and processing
- Graphite, nuclear technology, radiation studies
South African Nuclear Energy Corporation (South Africa)
2012-2024
North-West University
2004-2019
Abstract The 2022 Roadmap is the next update in series of Plasma Roadmaps published by Journal Physics D with intent to identify important outstanding challenges field low-temperature plasma (LTP) physics and technology. format same as previous representing visions 41 leading experts 21 countries five continents various sub-fields LTP science In recognition evolution field, several new topics have been introduced or given more prominence. These emphasis highlight increased interests...
The Limpopo Province in South Africa is richly endowed with thermal springs. Some have been developed for recreational, tourism or other purposes, while a number remain completely undeveloped. If the full economic potential of springs can be realised sustainable manner, they could make substantial contribution to local even regional economy. optimal use spring largely dependent upon its physical and chemical characteristics. This article focuses on temperature features 8 selected located...
The pyrolysis of used tires, UT, and natural rubber (Hevea brasiliensis), NR obtained from Nigerian NIG800 clonal tree, was performed the effects process conditions on product yield were investigated. An optimum attained at operating temperature 600°C, a heating rate 15°C min−1, for feed size 6 mm. UT gave maximum pyrolytic oil 34.40 75.93 wt%, respectively. characterized using Fourier transform infrared, nuclear magnetic resonance, gas chromatography–mass spectrometry (GC–MS). Results...
Tailings deposits from gold and uranium (U) mining in the Witwatersrand basin often contain elevated levels of radioactive chemo-toxic heavy metals. Through seepage, dissolved U other metals migrate tailings via groundwater into adjacent fluvial systems. The subsequent transport through flowing surface water is one most effective pathways distributing contaminants throughout biosphere. Mechanisms diffuse stream contamination, as well aqueous transportation were investigated. In this paper,...
The gasification of rubber chunks under CO 2 is a two-step process: first pyrolysis – popping open the bulk materials into charred fragments; followed by surface reaction with these fragments to form reverse-Boudouard reaction.
Abstract A continuous process is described whereby waste PTFE was converted into tetrafluoroethylene (C 2 F 4 , TFE), hexafluoroethane 6 HFE), hexafluoropropylene 3 HFP), and octafluorocyclobutane (c‐C 8 OFCB). The depolymerized inside a reactor that heated by radiofrequency induction generator. capable of operating at various temperatures (600–900°C) as well reduced pressures (5–80 kPa). depolymerization reaction conditions could be changed while the in operation order to manipulate product...
Surface water resources (the Vaal River and its tributaries) in the Vredefort Dome World Heritage Site (VDWHS), South Africa, have been over extended future development will rely solely on groundwater. Hence, being at a critical point balance, groundwater VDWHS require careful management protection to ensure sustainability equitable access. An assessment of geohydrological character was therefore done order develop resource plan. Five units were delineated measures for each unit developed...
Once dissolved uranium (U) from tailings deposits enters adjacent streams, subsequent downstream transport is affected by the rate at which U immobilised in sediments, thereby lowering its concentration stream water. For aqueous phases immobilisation includes adsorption onto sediments and suspended solids, as well precipitation co-precipitation insoluble compounds, all mechanisms being largely controlled pH redox potential (Eh) of Using real-time situ measurements pronounced diurnal...
Abstract In the 1960s, Malmani dolomite landscape of Transvaal Sequence on Far West Rand experienced ground subsidence in form sudden catastrophic sinkhole formations and extensive development dolines by gradual subsidence. The management gold mines had decided to dewater some dolomitic compartments allow their workers extract gold‐bearing ore underlying Witwatersrand Supergroup economically safely. Several have now reached end life span are due be decommissioned. Dewatering will...
Isothermal vapor–liquid equilibrium data are presented for the 1,1,2,2-tetrafluoroethylene and 1,1,2,3,3,3-hexafluoroprop-1-ene binary system at (248.14, 263.01, 282.89) K, with pressures ranging from (0.12 to 2.35) MPa. An apparatus based on "static–analytic" method, equipped a movable rapid online sampler–injector (ROLSI), was used undertake measurements. The combined expanded uncertainties estimated 0.11 4 kPa, 0.012 0.009 temperature, pressure, liquid vapor mole fractions, respectively....
Abstract A new method for beneficiating unfilled as well filled polytetrafluoroethylene (PTFE) waste has been developed. This process does not use any carrier gas while forming the depolymerization products. It enables polymer manufacturers and end‐users to reuse adds value fluorocarbon waste. The filler material was qualified by means of scanning electron microscopy thermogravimetric analysis success inside a rotating kiln proved visual observation. PTFE depolymerized kiln‐type reactor...
High pressure vapor–liquid equilibrium data are presented for the 1,1,2,2-tetrafluoroethene + 1,1,2,2,3,3,4,4-octafluorocyclobutane binary system. The isothermal measurements were undertaken at (248.3, 263.0, and 282.9) K, with pressures ranging from (0.040 to 2.340) MPa. A static–analytical apparatus was used carry out measurements. liquid vapor phases sampled using a movable rapid on-line sampler–injector (ROLSI). uncertainties in less than 0.1 1.5 kPa, 0.007 temperature, pressure, phase...
Development on dolomite poses a risk to people and their assets living it. Although development in the Tlokwe City Council (TCC) broadly took cognisance of presence dolomite, some parts township had been developed dolomite. Therefore, since is accountable for safe within its jurisdiction, Dolomite Risk Management Programme (DRMPr) should be put place according prevailing legislation, standards guidelines. For long-term mitigation measures implemented successfully, DRMPr integrated aligned...