Browsing by Subject "Limestone"

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    Limestone dissolution kinetics in upflow reactor systems
    (1995) Kornmüller, Ulrich Christopher Robin; Loewenthal, Richard Eric
    Waters derived from the Table Mountain sandstones are soft and acidic. Consequently they tend to be highly aggressive to cement materials and corrosive to metals. Full stabilization is normally effected using lime and carbon dioxide, this however is expensive and inappropriate in many rural areas. Partial stabilization effected by passing the water through limestone (calcium carbonate) granules appears to be a practical means of reducing aggression and corrosion problems associated with these waters. In this process calcium carbonate into the water increases the pH and the Alkalinity and calcium content. Feasibility of the process in part depends on the rate at which limestone dissolves into the water. This investigation addresses the problem of modelling the kinetics of the dissolution process and calibrating the model by experimentation.