Now showing items 1-20 of 100

    • Thermoelectric cooling for microwave transmitters located at remote sites 

      Pietersen, Richard Gordon (Cape Technikon, 1992)
      An investigation into the use of thermoelectric cooling energised by photovoltaic (PV) panels for removing sensible heat from electronic telecommunications equipment. The thermoelectric cooler consists of a solid-state ...
    • Development and application of ultrafiltration and reverse osmosis membranes 

      Malherbe, Gideon Francois (Cape Technikon, 1993)
      Various experimental and established membranes were tested on industrial effluents. Ultrafiltration, reverse osmosis and nanofiltration membranes were used in various applications. Research was done on aspects such as ...
    • The effect of the particle size distribution on non-Newtonian turbulent slurry flow in pipes 

      Thorvaldsen, Gary Sven (Cape Technikon, 1996)
      The handling of solid-liquid suspensions is an important concern within the chemical and processing industries and many theoretical models have been proposed to try and explain and predict turbulent flow behaviour. ...
    • Recovery of metal cyanides using a fluidized bed of resin 

      Nesbitt, Allan Bernard (Cape Technikon, 1996)
      Metal cyanide complexes are a toxic pollutant in waslewater originating from various industrial and mining activities. The removal/retrieval ofcyanide and metal cyanide complexes has been studiedby researches for many ...
    • The adsorption of gold from iodide solutions 

      Teirlinck, Peter Albert Maria (Cape Technikon, 1996)
      With the increasing awareness ofpreserving the environment, the need for other lixiviants in leaching processes has escalated. The investigation for lixiviants, especially for gold, has entailed mostly the halogen group. ...
    • The ion exchange phenomenon of acetylene black 

      Coetzee, Johannes Wilhelm (Cape Technikon, 1996)
      Acetylene Black IACB) IS a pure form of carbon which is used in the battery, plastics, printing and rubber industries. It is extensively used in the battery industry to absorb electrolyte and to lower the electrical ...
    • The removal of heavy metals from dilute aqueous streams by the use of ion exchange resins 

      Dietrich, Theo Henry (Cape Technikon, 1998)
      Ion exchange resins are widely used to remove or concentrate heavy metals from aqueous solutions or slurries.This thesis attempts to properly evaluate the interaction between ion exchange resins and heavy metals at trace ...
    • Development of a non-monochromatic lightwave sensor for applications in smart structures research 

      Kahn, Mohammed Tariq Ekeramodien (Peninsula Technikon, 1998)
      The purpose of this study was to perform an investigation into advances in the field of opto-electronics and to develop a suitable lightwave sensor, for application in smart structures research. Included in the scope of ...
    • A quantitative study into carbon-in-pulp adsorption operations 

      Gray, Diane Elizabeth (Cape Technikon, 1999)
      Carbon-in-pulp (CIP) and carbon-in-leach (CIL) remain the most effective, and widely used processes for gold recovery from cyanided pulps. The extensive use of carbon in such processes have prompted many researchers to ...
    • An environmentally sound gold recovery process for small-scale gold mining 

      Bouwer, Wendy (Cape Technikon, 1999)
      The gold mining industry has mainly relied upon the use of a highly polluting chemicals, such as mercury and cyanide, to recover gold from its ores. As environmental legislation has become more stringent in all countries ...
    • Transport of gases across membranes 

      Mokrani, Touhami (Peninsula Technikon, 2000)
      Oxygen transport across biofilms and membranes may be a limiting factor in the operation of a membrane bio-reactor. A Gradostat fungal membrane bio-reactor is one in which fungi are immobilized within the wall of a ...
    • Solar energy for domestic use 

      Van Zyl, GHC (Cape Technikon, 2000)
      The demand for pool heating has increased dramatically over the last few years. This is ascribed to the idea that a swimming pool is expensive and can only be used for four months of the year. Therefore, a need for a ...
    • Inhibition of the pregrobbing phenomenon in gold ores 

      Van den Berg, Rudolf (Cape Technikon, 2000)
      In a typical gold-recovery plant, it is estimated that a substantial amount of the gold in residues may be in the form that is recoverable by cyanidation. The gold in residues can be ascribed broadly to (l) the presence ...
    • The recovery of metal cyanides by ion exchange resins 

      Strangfeld, Vinzenz Klaus (Cape Technikon, 2000)
      Cyanide is used extensively in the mining industry to leach gold and silver from their ores. Cyanide, in the form of sodium or potassium cyanide, is added in excess to that required theoretically due to equilibrium and ...
    • The interaction between free cyanide and silver impregnated activated carbon in a column configuration 

      Dippenaar, Francois (Cape Technikon, 2000)
      Due to equilibrium constraints and the relatively slow kinetics of the cyanidation of gold ores, calcium or potassium cyanide is added to the leaching stage in excess to that required theoretically. This, in many situations, ...
    • Recovery of impregnated gold from waste mine timber through biological degradation 

      Martin, W. (Cape Technikon, 2000)
      The large quantities of wood chips produced at mines from damaged underground timber contain gold that cannot be completely recovered by cyanidation. A fungus that can degrade a portion of the wood matrix will allow the ...
    • Flotation as a separation technique in the coal gold agglomeration process 

      Moses, Lucian Benedict (Cape Technikon, 2000)
      Internationally, there is an increase in the need for safer environmental processes that can be applied to mining operations, especially on a small scale, where mercury amalgamation is the main process used for the recovery ...
    • Membrane bioreactor production of lignin and manganese peroxidase 

      Solomon, MS (Cape Technikon, 2001)
      The white-rot fungus (WRF), Phanerochaete chrysosporium, is a well known microorganism which produces ligninolytic enzymes. These enzymes can play a major role in the bioremediation of a diverse range of environmental ...
    • Water stabilisation through a limestone mediated sidestream process 

      Tsotsi, Ciciyela Mlungisi (Cape Technikon, 2001)
      Approximately 40% of the surface waters of South Africa, and the surface waters of Lesotho, are soft and acidic with low calcium, alkalinity and carborrate species concentration. Distribution of such waters results in ...
    • Equilibrium shift of gold adsorption in a batch reactor 

      Burnett, Hannelene Jo-Anne (Cape Technikon, 2001)
      Over the years the carbon-in-pulp technology has been refined to become the highly efficient process that is used in our present-day system of recovering dissolved gold from cyanide leached pulps. The efficiency of a ...