Flotation, a process originating from the minerals industry, is finding its way as a separation process for dilute aqueous solutions, with particular interest in metal ions recovery. The present paper reviewes the several flotation techniques available in this area, with certain illustrative laboratory examples. Metals investigated are the following : chromium, copper, zinc, arsenic, lead, iron and germanium. The various parameters affecting the process are examined and attention is paid towards the selectivity of the process.
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Matis et al. (1991) studied this question.
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