Abstract
The application of flotation for the removal of humic acids was investigated in the present study, as a possible post-treatment stage of simulated landfill leachates, i.e., after biological treatment. Several parameters were examined towards the optimization of humic acids removal; the dosage of collector was found to be the major one, controlling the overall efficiency of the process. However, the type and dosage of frother, the solution pH, ionic strength and flotation time were found to be also significant factors, affecting the removal of humic acids. Under optimized conditions, which are mainly determined by initial concentration of humic acids, the treatment performance was found to be very efficient, reaching almost 99%, indicating that flotation can serve as a possible alternative technology for the removal of humic acids.
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