Abstract
This paper discusses the application of a foam fractionating column operating strictly in simple mode. The system chosen was zinc and sodium lauryl sulphate. Using the correct way of operating a foam fractionating column in simple mode, as was discussed in a separate paper by the same author, the combined influence of collector and metal ion concentrations on zinc surface excess was studied. Even a small amount of collector was found to be sufficient to saturate the bubble surface. However, for higher bulk zinc concentrations a higher collector concentration was required to maximize the zinc surface excess. The bulk zinc concentration and solution pH mutually affected the zinc surface excess. White a bulk zinc concentration of 0.15 mol/m3 was found to be optimum to maximize the zinc surface excess, a pH of 4.0 provided optimum surface excess for any bulk zinc concentration.
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